The Evolution of TDMA to 3G & 4G Wireless Systems. Nelson Sollenberger AT&T Labs-Research Wireless Systems Research Division
|
|
- Bertram Roberts
- 6 years ago
- Views:
Transcription
1 The Evolution of TDMA to 3G & 4G Wireless Systems Nelson Sollenberger AT&T Labs-Research Wireless Systems Research Division
2 AT&T Wireless Services AT&T serves over 14 million subscribers with digital TDMA technology and some remaining analog technology, and provides packet data service with CDPD technology TDMA European GSM over 250 million North American TDMA ~ 50 million Japanese PDC ~ 50 million CDMA North American CDMA ~ 60 million (including S. Korea) Other TDMA operators - Rogers AT&T - Cingular (SBC & BellSouth) - throughout Mexico, Central & South America
3 Cellular Telephony Handsets Nokia 5160 Nokia 8860 Ericsson PD 328 Motorola StarTAC ST7790 Phone Various TDMA phones available today
4 TDMA parameters 30 KHz channels (like analog & CDPD) 20 msec speech frames 24.3 kbaud symbol rate 3 time-slots/users 7.4 kbps ACELP speech coding 1/2-rate channel coding on important bits interleaved over 2 bursts in 40 msec Differential pi/4-qpsk modulation
5 TDMA Capacity Roadmap Reuse N = 7 N = 5 N = 4 Dual band base Operation at 800 or 1900 MHz. Calls can be set up on either frequency band and handed between them to manage traffic Additional spectrum at 1900 MHz adds directly to capacity of cell Smart Antennas Base station antennas systems that use digital signal processing to cancel interference Dynamic Channel Assignment Network automatically assigns radio frequencies to cell sites for more efficient utilization of frequencies Base Station Power Control Base stations only transmit power required to reach mobile with adequate signal quality resulting in lower interference Discontinuous Transmission Mobiles transmit only during when user is speaking. Lowers interference in the system and increases talk time
6 IS-136 Smart Antenna Test Bed Reuse of 3/9 to 4/12, instead of 7/21, approximately 2x capacity Two dual polarization uplink antennas, downlink multibeam antenna with 4-30 beams Shared linear power amplifier unit with Butler matrices Real-time downlink power control with beam tracking
7 Wireless Data Terminals Sierra PCMCIA CDPD Modem Nokia 9110 The new Ericsson R380 phone, which features wireless data 3COM Palm VII functions Nokia 3G vision
8 WIRELESS COMPUTING WIRELESS GROWTH INTERNET GROWTH - web access - - file transfer - location services - streaming audio & video RF & DIGITAL TECHNOLOGY MOBILE SOFTWARE
9 Macrocellular Wireless Data Evolution & AT&T s Roadmap 5 M Wideband OFDM data rate 1 M HDR 384 k EDGE WCDMA GPRS 64 k IS-136+ IS-95+ PDC 9.6 k GSM IS-136 CDPD IS
10 EDGE Technology Enhanced Data-rates for Global Evolution Evolutionary path to 3G services for GSM and TDMA operators Builds on General Packet Radio Service (GPRS) air interface and networks Phase 1 (Release 99 & 2002 deployment) supports best effort packet data at speeds up to about 384 kbps Phase 2 (Release 2000 & 2003 deployment) will add Voice over IP capability
11 GPRS Airlink General Packet Radio Service (GPRS) Same GMSK modulation as GSM 4 channel coding modes Packet-mode supporting up to about 144 kbps Flexible time slot allocation (1-8) Radio resources shared dynamically between speech and data services Independent uplink and downlink resource allocation
12 EDGE Airlink Extends GPRS packet data with adaptive modulation/coding 2x spectral efficiency of GPRS for best effort data 8-PSK/GMSK at 271 ksps in 200 KHz RF channels supports 8.8 to 59.2 kbps per time slot Supports peak rates over 384 kbps Requires linear amplifiers with < 3 db peak to average power ratio using linearized GMSK pulses Initial deployment with less than 2x 1 MHz using 1/3 reuse with EDGE Compact as a complementary data service
13 GPRS Networks consists of packet wireless access network and IP-based backbone shares mobility databases with circuit voice services and adds new packet switching nodes (SGSN & GGSN) will support GPRS, EDGE & WCDMA airlinks provides an access to packet data networks Internet X.25 provides services to different mobile classes ranging from 1-slot to 8-slot capable radio resources shared dynamically between speech and data services
14 Compact vs Classic Classic 4/12 reuse continuous downlinks on first 12 carriers 2.4 MHz x2 minimum spectrum Compact 1/3 reuse in space frame synchronized base stations reuse of 4 in time for control channels partial loading for traffic channels discontinuous downlinks 600 KHz x2 minimum spectrum
15 EDGE Channel Coding and Frame Structure Burst N 464 bits 1 data block Convolutional Coding Rate = 1/3 Length = 7 Puncture 1392 bits 1392 bits Interleave Burst N+1 Burst N bits/ burst symbols/slot 8PSK Modulate bits Burst Format 348 bits Burst N+3 20 msec frame with 4 time-slots for each of 8 bearers 8 Time Slots Time Slot = µs Tail symbols 3 Data symbols 58 Training symbols 26 Data symbols 58 Tail symbols 3 Guard symbols 8.25 Modulation: 8PSK, 3 bits/symbol Symbol rate: ksps Payload/burst: 348 bits Gross bit rate/time slot: 69.6 kbps - overhead = 59.2 kbps user data
16 EDGE Modulation, Channel Coding & Bit Rates Scheme Modulation Maximum rate [kb/s] Code Rate Family MCS-9 8PSK A MCS A MCS B MCS A MCS B MCS-4 GMSK C MCS A MCS B MCS C
17 EDGE Link Throughput 9
18 EDGE Compact System Performance Probability throughput < = X per timeslot % % X (kb/s) Probability packet delay < = X X (msec) 26 users/sector at 3.5 kbps average load per user
19 EDGE Classic Multi-slot Gain Average User Throughput (kb/s) single-slot Multi-slot Ave. # of users per sector
20 EDGE Evolution Best effort IP packet data on EDGE Voice over IP on EDGE circuit bearers Network based intelligent resource assignment Smart antennas & adaptive antennas Downlink speeds at several Mbps based on wideband OFDM and/or multiple virtual channels
21 Normalized voice capacity (Erlang/Site/MHz) VoIP over EDGE Bearer Performance Focused on GMSK full-rate & 8PSK half-rate EDGE channels with dedicated MAC & random frequency hopping for 7.4 kbps voice coding MHz Spectrum Baseline Enhanced GSM IS-136 EGPRS/GMSK/F EGPRS/8PSK/H * 1/3 reuse * no shadow fading change due to mobility *Signal-based power control is assumed for baseline EGRPS *SINR-based power control & LI-DCA assumed for enhanced *This assumes 30 mph vehicle speed for micro fading * SINR-based power control with adaptive target
22 Smart Antennas for EDGE Key enhancement technique to improve system capacity and user experience Leverage Smart Antennas currently in development/deployment for IS-136 & GSM BEAMFORMER SIGNAL Uplink Adaptive Antenna INTERFERENCE SIGNAL OUTPUT BEAMFORMER WEIGHTS Downlink Switched Beam Antenna SIGNAL BEAM SELECT SIGNAL OUTPUT Aggressive frequency re-use High spectrum efficiency Increased co-channel interference INTERFERENCE Smart antennas provide substantial interference suppression for enhanced performance
23 EDGE Smart Antenna Processing Dual Diversity Receiver Using DDFSE for Joint ISI and CCI Suppression Output Data Viterbi Decoder Receiver Deinterleaver Rx Rx Rx Filter Rx Filter Symbol Timing and Recovery Feed-forward Filter Feed-forward Filter Soft Output DDFSE Equalizer Equalizer Training Jack Winters Hanks Zeng Ashutosh Dixit Simulation results show a 15 to 30 dbimprovement in S/I with 2 receive antennas Real-time EDGE Test Bed supports laboratory and field tests to demonstrate improved performance
24 EDGE 2-Branch Smart Antenna Performance Laboratory Tests Block Error Rate EDGE MCS-5 with Interference Suppression in a Typical Urban Environment 20 db SNR Signal-to-Interference Ratio (db) Laboratory results show a 15 to 30 db improvement in S/I with 2 receive antennas
25 Improvement with Terminal Diversity and Interference Suppression: User Experience Prototype Dual Antenna Handset External Whip Internal Patch Prob. (throughput <=X) (%) No Diversity Simple Diversity Interference Suppression Multi-cell EDGE Compact Simulation X (kb/s) - 1/3 reuse - 18 users per sector kbps average load per user Typical user throughput increased from 30 to 45 kbps per time-slot
26 4G Wireless: One View 4G WOFDM high speed downlink a wireless cable modem Complement to EDGE/UMTS High peak data rates (up to 10 Mb/s) in a 5 MHz channel spectrum MHz to 3 GHz 3G EDGE/WCDMA network for uplink, downlink, control and signalling
27 Path Loss and Fading Challenge Delay Spread Reflected signals arrive spread out over 5 to 20 microsecond Path Loss path loss up to ~ 150 db (that is a 1 followed by 15 zeroes) Rayleigh Fading rapid fading of 20 to 30 db (power varies by 100 to 1000 times in level at rates of about 100 times per second)
28 Cumulative Probability Cellular Interference Challenge 1 Each base station is equipped with three 120 degree directional antennas to reduce interference & improve capacity reuse 2 6 reuse 3 9 reuse 4 12 reuse 7/21 reuse Signal to Interference ratio in db
29 AT&T Labs-Research Work on 4G Smart antennas Multiple-Input-Multiple-Output Systems Space-Time Coding Dynamic Packet Assignment Wideband OFDM
30 MIMO Radio Channel Measurements Multiple antennas at both the base station and terminal can significantly increase data rates with sufficient multipath Ability to separate signals from closely spaced antennas has been demonstrated indoors and in AT&T-Lucent IS-136 field trial Lucent has demonstrated 26 bps/hz in 30 khz channel with 8 Tx and 12 Rx antennas indoors AT&T has performed measurements on 4 Tx by 4 Rx antenna configurations in full mobile & outdoor to indoor environments
31 MIMO Channel Measurement System Transmitter 4 antennas mounted on a laptop 4 coherent 1 Watt 1900 MHz transmitters with synchronous waveform generator Receive System Dual-polarized slant 45 PCS antennas separated by 10 feet and fixed multibeam antenna with 4-30 beams 4 coherent 1900 MHz receivers with real-time baseband processing using 4 TI TMS320C40 DSPs
32 MIMO Measured Channel Capacity Potential Capacity Relative to a Single Antenna System Capacity increase close to 4 times that of a single antenna is possible with 4 transmit and 4 receive antennas Capacity for pedestrians is similar to mobile users
33 Performance Measure Complex channel measurement: H = [ H ij ] for the i th transmit and j th receive antenna Capacity (instantaneous and averaged over 1 second) for 4 TX by 4 RX: C = log 2 (det[i + ( /4)H H]) = log 2 (1 + ( /4) i ) where is the total signal-to-noise ratio per antenna and i is the i th eigenvalue of H H To eliminate the effect of shadow fading, the capacity is normalized to the average capacity with a single antenna: C n = log 2 (1 + ( /4) i ) / (1/16) log 2 (1 + H ij )
34 Multiple Input Multiple Output Wireless RX diversity - HF, terrestrial microwave, cellular. TX frequency offset diversity & simulcasting for paging - 70 s Adaptive array processing in military systems TX diversity - 80 s frequency offset (channel decoding combining) delay (equalizer combining) Optimum combining for cellular (multipath channels) - 80 s Space-division multiple access - 80 s & 90 s angle-of-arrival based multi-path based (supports co-location & multi-channels per user) MIMO - 80 s & 90 s Multiple spatial channels using adaptive antenna arrays BLAST - successive interference cancellation combined with coding Space-Time coding
35 Space-Time Coding How do you enhance TX delay diversity ( a repetition code)?
36 Multiple Antennas increase System Capacity MIMO (BLAST & space-time coding) techniques increase bit rate and/or quality on a link by creating multiple channels and/or enhancing diversity Switched/steered beam antennas for base stations and interference suppression/adaptive antennas for terminals reduce interference, increasing system capacity
37 OFDM for 4G Wireless ~ 800 tones ~ 5 MHz ~ 6 khz Mobile OFDM parameters: ex. OFDM is being increasingly used in high -speed information transmission systems: - European HDTV - Digital Audio Broadcast (DAB) - Digital Subscriber Loop (DSL) - IEEE Wireless LAN 5 MHz channels ~ 6 KHz tones ~ 13/26 MHz sample rate 2048 FFT size (160 usec OFDM blocks) 256/512 sample OFDM block guard time QPSK & 16-QAM modulation adaptive modulation/coding 1 to 2 msec time-slots in 20 to 40 msec frames
38 OFDM Characteristics High peak-to-average power levels Preservation of orthogonality in severe multi-path Efficient FFT based receiver structures Enables efficient TX and RX diversity Adaptive antenna arrays without joint equalization Support for adaptive modulation by subcarrier Frequency diversity Robust against narrow-band interference Efficient for simulcasting Variable/dynamic bandwidth Used for highest speed applications Supports dynamic packet access
39 OFDM Robust Channel Estimation received signals FFT FFT data remove data 2-branch maximal-ratio combining IFFT synch word FFT Estimator 1 Estimator 2
40 Word Error Rate WOFDM 2-Branch Diversity Performance CC, k=9 CC, k=3 RS SNR (db)
41 Spectrum Efficiency Efficiency SNR (db) Synch CDMA Dynamic Channel Allocation with Power Control Dynamic Channel Allocation Source: G. J. Pottie, IEEE Personal Communications, pp , October 1995 Efficiency: IS ; IS ; GSM 0.04
42 Dynamic Packet Assignment 2. Mobile sends measurements of path losses for nearby bases to serving base 4. Bases assign channels to all packets/mobiles 1. Mobile locks to the STRONGEST base 3. Serving base forwards measurements to nearby bases 5. Bases forward channel assignment info to nearby bases ~ 50 % improvement in performance
43 Wideband OFDM Staggered Frame Superframe Superframe 80 ms 80 ms Frame 20 ms Control Slots 16 resources in 1 msec time-slots Control Slots... 4 ms 20 OFDM Blocks 5 Blocks 5 Blocks 5 Blocks 5 Blocks group A group B group C group D 2 B data 1B Sync & data 2 B data
44 Ave. User Packet Delay (msec) WOFDM Performance with Dynamic Packet Assignment & 5 MHz of Spectrum MR, No beam-forming IS, No beam-forming MR, Four beams per sector IS, Four beams per sector Throughput per site (kb/s)
45 OFDM Experimental Program Baseband signal processing based on commercial off-the-shelf DSP hardware with some custom designed components Sony-provided 1900 MHz transceivers Real-time performance measured through RF channel fading simulator Phase 1 parameters: - >384 kb/s end user data rate khz downlink bandwidth - GSM-derived clocks (2.166 MHz sample rate with 512 FFT) kbaud OFDM tones with khz tone spacing - differential detection - Reed-Solomon channel coding
46 Typical Urban channel 800 khz RF A/D FFT RF A/D FFT Demodulator OFDM receiver Erasure detection Decoder Data Intf
47 Summary: Key Features of 4G W-OFDM IP packet data centric Support for streaming, simulcasting & generic data Peak downlink rates of 5 to 10 Mbps Full macro-cellular/metropolitan coverage Asymmetric with 3G uplinks (EDGE) Variable bandwidth - 1 to 5 MHz Adaptive modulation/coding Smart/adaptive antennas supported MIMO/BLAST/space-time coding modes Frame synchronized base stations using GPS Network assisted dynamic packet assignment
Mobile Communication Systems. Part 7- Multiplexing
Mobile Communication Systems Part 7- Multiplexing Professor Z Ghassemlooy Faculty of Engineering and Environment University of Northumbria U.K. http://soe.ac.uk/ocr Contents Multiple Access Multiplexing
More informationECE 476/ECE 501C/CS Wireless Communication Systems Winter Lecture 9: Multiple Access, GSM, and IS-95
ECE 476/ECE 501C/CS 513 - Wireless Communication Systems Winter 2003 Lecture 9: Multiple Access, GSM, and IS-95 Outline: Two other important issues related to multiple access space division with smart
More informationIS-95 /CdmaOne Standard. By Mrs.M.R.Kuveskar.
IS-95 /CdmaOne Standard By Mrs.M.R.Kuveskar. CDMA Classification of CDMA Systems CDMA SYSTEMS CDMA one CDMA 2000 IS95 IS95B JSTD 008 Narrow Band Wide Band CDMA Multiple Access in CDMA: Each user is assigned
More informationPage 1. Overview : Wireless Networks Lecture 9: OFDM, WiMAX, LTE
Overview 18-759: Wireless Networks Lecture 9: OFDM, WiMAX, LTE Dina Papagiannaki & Peter Steenkiste Departments of Computer Science and Electrical and Computer Engineering Spring Semester 2009 http://www.cs.cmu.edu/~prs/wireless09/
More informationRADIO LINK ASPECT OF GSM
RADIO LINK ASPECT OF GSM The GSM spectral allocation is 25 MHz for base transmission (935 960 MHz) and 25 MHz for mobile transmission With each 200 KHz bandwidth, total number of channel provided is 125
More informationHistory of the Digital Mobile Radio Systems in NTT & DoCoMo
History of the Digital Mobile Radio Systems in NTT & DoCoMo The University of Electro-Communications Nobuo Nakajima Progress of the Mobile Radio Systems Every 10 years 1 G Analog 2 G Digital 3 G IMT-2000
More informationWireless Networks: An Introduction
Wireless Networks: An Introduction Master Universitario en Ingeniería de Telecomunicación I. Santamaría Universidad de Cantabria Contents Introduction Cellular Networks WLAN WPAN Conclusions Wireless Networks:
More informationWireless and Mobile Network Architecture. Outline. Introduction. Cont. Chapter 1: Introduction
Wireless and Mobile Network Architecture Chapter 1: Introduction Prof. Yuh-Shyan Chen Department of Computer Science and Information Engineering National Taipei University Sep. 2006 Outline Introduction
More informationWireless and Mobile Network Architecture
Wireless and Mobile Network Architecture Chapter 1: Introduction Prof. Yuh-Shyan Chen Department of Computer Science and Information Engineering National Taipei University Sep. 2006 1 Outline Introduction
More informationK.NARSING RAO(08R31A0425) DEPT OF ELECTRONICS & COMMUNICATION ENGINEERING (NOVH).
Smart Antenna K.NARSING RAO(08R31A0425) DEPT OF ELECTRONICS & COMMUNICATION ENGINEERING (NOVH). ABSTRACT:- One of the most rapidly developing areas of communications is Smart Antenna systems. This paper
More informationEvolution of Cellular Systems. Challenges for Broadband Wireless Systems. Convergence of Wireless, Computing and Internet is on the Way
International Technology Conference, 14~15 Jan. 2003, Hong Kong Technology Drivers for Tomorrow Challenges for Broadband Systems Fumiyuki Adachi Dept. of Electrical and Communications Engineering, Tohoku
More informationReferences. What is UMTS? UMTS Architecture
1 References 2 Material Related to LTE comes from 3GPP LTE: System Overview, Product Development and Test Challenges, Agilent Technologies Application Note, 2008. IEEE Communications Magazine, February
More informationInvestigation on Multiple Antenna Transmission Techniques in Evolved UTRA. OFDM-Based Radio Access in Downlink. Features of Evolved UTRA and UTRAN
Evolved UTRA and UTRAN Investigation on Multiple Antenna Transmission Techniques in Evolved UTRA Evolved UTRA (E-UTRA) and UTRAN represent long-term evolution (LTE) of technology to maintain continuous
More informationThe 5th Smart Antenna Workshop 21 April 2003, Hanyang University, Korea Broadband Mobile Technology Fumiyuki Adachi
The 5th Smart Antenna Workshop 21 April 2003, Hanyang University, Korea Broadband Mobile Technology Fumiyuki Adachi Dept. of Electrical and Communications Engineering, Tohoku University, Japan adachi@ecei.tohoku.ac.jp
More informationCDMA Principle and Measurement
CDMA Principle and Measurement Concepts of CDMA CDMA Key Technologies CDMA Air Interface CDMA Measurement Basic Agilent Restricted Page 1 Cellular Access Methods Power Time Power Time FDMA Frequency Power
More informationAdoption of this document as basis for broadband wireless access PHY
Project Title Date Submitted IEEE 802.16 Broadband Wireless Access Working Group Proposal on modulation methods for PHY of FWA 1999-10-29 Source Jay Bao and Partha De Mitsubishi Electric ITA 571 Central
More informationCROSS-LAYER DESIGN FOR QoS WIRELESS COMMUNICATIONS
CROSS-LAYER DESIGN FOR QoS WIRELESS COMMUNICATIONS Jie Chen, Tiejun Lv and Haitao Zheng Prepared by Cenker Demir The purpose of the authors To propose a Joint cross-layer design between MAC layer and Physical
More informationTechnical Aspects of LTE Part I: OFDM
Technical Aspects of LTE Part I: OFDM By Mohammad Movahhedian, Ph.D., MIET, MIEEE m.movahhedian@mci.ir ITU regional workshop on Long-Term Evolution 9-11 Dec. 2013 Outline Motivation for LTE LTE Network
More informationChapter 5 3G Wireless Systems. Mrs.M.R.Kuveskar.
Chapter 5 3G Wireless Systems Mrs.M.R.Kuveskar. Upgrade paths for 2G Technologies 2G IS-95 GSM- IS-136 & PDC 2.5G IS-95B HSCSD GPRS EDGE Cdma2000-1xRTT W-CDMA 3G Cdma2000-1xEV,DV,DO EDGE Cdma2000-3xRTT
More informationOne Cell Reuse OFDM/TDMA using. broadband wireless access systems
One Cell Reuse OFDM/TDMA using subcarrier level adaptive modulation for broadband wireless access systems Seiichi Sampei Department of Information and Communications Technology, Osaka University Outlines
More informationDifference Between. 1. Old connection is broken before a new connection is activated.
Difference Between Hard handoff Soft handoff 1. Old connection is broken before a new connection is activated. 1. New connection is activated before the old is broken. 2. "break before make" connection
More informationIntroduction to WiMAX Dr. Piraporn Limpaphayom
Introduction to WiMAX Dr. Piraporn Limpaphayom 1 WiMAX : Broadband Wireless 2 1 Agenda Introduction to Broadband Wireless Overview of WiMAX and Application WiMAX: PHY layer Broadband Wireless Channel OFDM
More informationData and Computer Communications
Data and Computer Communications Chapter 14 Cellular Wireless Networks Eighth Edition by William Stallings Cellular Wireless Networks key technology for mobiles, wireless nets etc developed to increase
More informationEC 551 Telecommunication System Engineering. Mohamed Khedr
EC 551 Telecommunication System Engineering Mohamed Khedr http://webmail.aast.edu/~khedr 1 Mohamed Khedr., 2008 Syllabus Tentatively Week 1 Week 2 Week 3 Week 4 Week 5 Week 6 Week 7 Week 8 Week 9 Week
More informationWeek 2. Topics in Wireless Systems EE584-F 03 9/9/2003. Copyright 2003 Stevens Institute of Technology - All rights reserved
Week Topics in Wireless Systems 43 0 th Generation Wireless Systems Mobile Telephone Service Few, high-power, long-range basestations -> No sharing of spectrum -> few users -> expensive 44 Cellular Systems
More informationETSI SMG#24 TDoc SMG 903 / 97. December 15-19, 1997 Source: SMG2. Concept Group Alpha - Wideband Direct-Sequence CDMA: System Description Summary
ETSI SMG#24 TDoc SMG 903 / 97 Madrid, Spain Agenda item 4.1: UTRA December 15-19, 1997 Source: SMG2 Concept Group Alpha - Wideband Direct-Sequence CDMA: System Description Summary Concept Group Alpha -
More information3G TECHNOLOGY WHICH CAN PROVIDE AUGMENTED DATA TRANSFER RATES FOR GSM STANDARTS AND THE MODULATION TECHNIQUES
3G TECHNOLOGY WHICH CAN PROVIDE AUGMENTED DATA TRANSFER RATES FOR GSM STANDARTS AND THE MODULATION TECHNIQUES Mustafa ALKAN Ejder ORUÇ Nur ERZEN Özgür GENÇ malkan@tk.gov.tr eoruc@tk.gov.tr nerzen@tk.gov.tr
More informationBackground: Cellular network technology
Background: Cellular network technology Overview 1G: Analog voice (no global standard ) 2G: Digital voice (again GSM vs. CDMA) 3G: Digital voice and data Again... UMTS (WCDMA) vs. CDMA2000 (both CDMA-based)
More informationSmart Antenna Techniques and Their Application to Wireless Ad Hoc Networks
Smart Antenna Techniques and Their Application to Wireless Ad Hoc Networks Jack H. Winters May 31, 2004 jwinters@motia.com 12/05/03 Slide 1 Outline Service Limitations Smart Antennas Ad Hoc Networks Smart
More informationIEEE c-00/40. IEEE Broadband Wireless Access Working Group <
Project Title Date Submitted Source(s) IEEE 802.16 Broadband Wireless Access Working Group Initial PHY Layer System Proposal for Sub 11 GHz BWA 2000-10-30 Anader Benyamin-Seeyar
More informationSNS COLLEGE OF ENGINEERING COIMBATORE DEPARTMENT OF INFORMATION TECHNOLOGY QUESTION BANK
SNS COLLEGE OF ENGINEERING COIMBATORE 641107 DEPARTMENT OF INFORMATION TECHNOLOGY QUESTION BANK EC6801 WIRELESS COMMUNICATION UNIT-I WIRELESS CHANNELS PART-A 1. What is propagation model? 2. What are the
More informationS.D.M COLLEGE OF ENGINEERING AND TECHNOLOGY
VISHVESHWARAIAH TECHNOLOGICAL UNIVERSITY S.D.M COLLEGE OF ENGINEERING AND TECHNOLOGY A seminar report on Orthogonal Frequency Division Multiplexing (OFDM) Submitted by Sandeep Katakol 2SD06CS085 8th semester
More informationWelcome to SSY145 Wireless Networks Lecture 2
Welcome to SSY145 Wireless Networks Lecture 2 By Hani Mehrpouyan, Department of Signals and Systems, Chalmers University of Technology, hani.mehr@ieee.org Office #6317 1 Copy right 2011 Outline History
More informationMulti-carrier Modulation and OFDM
3/28/2 Multi-carrier Modulation and OFDM Prof. Luiz DaSilva dasilval@tcd.ie +353 896-366 Multi-carrier systems: basic idea Typical mobile radio channel is a fading channel that is flat or frequency selective
More information3G long-term evolution
3G long-term evolution by Stanislav Nonchev e-mail : stanislav.nonchev@tut.fi 1 2006 Nokia Contents Radio network evolution HSPA concept OFDM adopted in 3.9G Scheduling techniques 2 2006 Nokia 3G long-term
More information<3rd generation CDMA wireless systems>
Page 1 Overview What is 3G? A brief overview of IS95 Key design choices for CDMA 3G systems. Bandwidth Modulation Coding Power Control
More informationIEEE Broadband Wireless Access Working Group < Initial PHY Layer System Proposal for Sub 11 GHz BWA
Project Title Date Submitted Source(s) Re: Abstract Purpose Notice Release Patent Policy and Procedures IEEE 802.16 Broadband Wireless Access Working Group Initial PHY Layer System
More informationSC - Single carrier systems One carrier carries data stream
Digital modulation SC - Single carrier systems One carrier carries data stream MC - Multi-carrier systems Many carriers are used for data transmission. Data stream is divided into sub-streams and each
More informationPersonal Communication System
Personal Communication System Differences Between Cellular Systems and PCS IS-136 (TDMA) PCS GSM i-mode mobile communication IS-95 CDMA PCS Comparison of Modulation Schemes Data Communication with PCS
More informationMultiplexing Module W.tra.2
Multiplexing Module W.tra.2 Dr.M.Y.Wu@CSE Shanghai Jiaotong University Shanghai, China Dr.W.Shu@ECE University of New Mexico Albuquerque, NM, USA 1 Multiplexing W.tra.2-2 Multiplexing shared medium at
More informationCHAPTER 10 CONCLUSIONS AND FUTURE WORK 10.1 Conclusions
CHAPTER 10 CONCLUSIONS AND FUTURE WORK 10.1 Conclusions This dissertation reported results of an investigation into the performance of antenna arrays that can be mounted on handheld radios. Handheld arrays
More informationWireless Physical Layer Concepts: Part III
Wireless Physical Layer Concepts: Part III Raj Jain Professor of CSE Washington University in Saint Louis Saint Louis, MO 63130 Jain@cse.wustl.edu These slides are available on-line at: http://www.cse.wustl.edu/~jain/cse574-08/
More informationSimple Algorithm in (older) Selection Diversity. Receiver Diversity Can we Do Better? Receiver Diversity Optimization.
18-452/18-750 Wireless Networks and Applications Lecture 6: Physical Layer Diversity and Coding Peter Steenkiste Carnegie Mellon University Spring Semester 2017 http://www.cs.cmu.edu/~prs/wirelesss17/
More informationStudy on the next generation ITS radio communication in Japan
Study on the next generation ITS radio communication in Japan DSRC International Task Force, Japan Contents 1. 5.8GHz DSRC in Japan (ARIB STD-T75) 2. Requirements for the next generation ITS radio communication
More informationCSC344 Wireless and Mobile Computing. Department of Computer Science COMSATS Institute of Information Technology
CSC344 Wireless and Mobile Computing Department of Computer Science COMSATS Institute of Information Technology Wireless Cellular Networks: 2.5G and 3G 2.5G Data services over 2G networks GSM: High-speed
More informationEECS 380: Wireless Technologies Week 7-8
EECS 380: Wireless Technologies Week 7-8 Michael L. Honig Northwestern University May 2018 Outline Diversity, MIMO Multiple Access techniques FDMA, TDMA OFDMA (LTE) CDMA (3G, 802.11b, Bluetooth) Random
More informationAdvanced Communication Systems -Wireless Communication Technology
Advanced Communication Systems -Wireless Communication Technology Dr. Junwei Lu The School of Microelectronic Engineering Faculty of Engineering and Information Technology Outline Introduction to Wireless
More informationMIMO in 3G STATUS. MIMO for high speed data in 3G systems. Outline. Information theory for wireless channels
MIMO in G STATUS MIMO for high speed data in G systems Reinaldo Valenzuela Wireless Communications Research Department Bell Laboratories MIMO (multiple antenna technologies) provides higher peak data rates
More informationLecture 3 Cellular Systems
Lecture 3 Cellular Systems I-Hsiang Wang ihwang@ntu.edu.tw 3/13, 2014 Cellular Systems: Additional Challenges So far: focus on point-to-point communication In a cellular system (network), additional issues
More informationWireless Medium Access Control and CDMA-based Communication Lesson 16 Orthogonal Frequency Division Medium Access (OFDM)
Wireless Medium Access Control and CDMA-based Communication Lesson 16 Orthogonal Frequency Division Medium Access (OFDM) 1 4G File transfer at 10 Mbps High resolution 1024 1920 pixel hi-vision picture
More informationField Experiments of 2.5 Gbit/s High-Speed Packet Transmission Using MIMO OFDM Broadband Packet Radio Access
NTT DoCoMo Technical Journal Vol. 8 No.1 Field Experiments of 2.5 Gbit/s High-Speed Packet Transmission Using MIMO OFDM Broadband Packet Radio Access Kenichi Higuchi and Hidekazu Taoka A maximum throughput
More informationCellular Network Planning and Optimization Part VI: WCDMA Basics. Jyri Hämäläinen, Communications and Networking Department, TKK, 24.1.
Cellular Network Planning and Optimization Part VI: WCDMA Basics Jyri Hämäläinen, Communications and Networking Department, TKK, 24.1.2008 Outline Network elements Physical layer Radio resource management
More informationMultiple Access Techniques for Wireless Communications
Multiple Access Techniques for Wireless Communications Contents 1. Frequency Division Multiple Access (FDMA) 2. Time Division Multiple Access (TDMA) 3. Code Division Multiple Access (CDMA) 4. Space Division
More informationMODULATION AND MULTIPLE ACCESS TECHNIQUES
1 MODULATION AND MULTIPLE ACCESS TECHNIQUES Networks and Communication Department Dr. Marwah Ahmed Outlines 2 Introduction Digital Transmission Digital Modulation Digital Transmission of Analog Signal
More information[Insert Document Title Here]
[Insert Document Title Here] IEEE 802.16 Presentation Submission Template (Rev. 8) Document Number: IEEE 802.16.3p-00/33 Date Submitted: 2000-11-13 Source: Yossi Segal Voice: 972-3-9528440 RunCom Technologies
More informationWireless WANS and MANS. Chapter 3
Wireless WANS and MANS Chapter 3 Cellular Network Concept Use multiple low-power transmitters (100 W or less) Areas divided into cells Each served by its own antenna Served by base station consisting of
More informationPerformance Evaluation of 3G CDMA Networks with Antenna Arrays
Jul. 2003 1 Performance Evaluation of 3G CDMA Networks with Antenna Arrays IEEE 4th Workshop on Applications and Services in Wireless Networks Dr. D. J. Shyy The Corporation Jin Yu and Dr. Yu-Dong Yao
More informationOFDMA PHY for EPoC: a Baseline Proposal. Andrea Garavaglia and Christian Pietsch Qualcomm PAGE 1
OFDMA PHY for EPoC: a Baseline Proposal Andrea Garavaglia and Christian Pietsch Qualcomm PAGE 1 Supported by Jorge Salinger (Comcast) Rick Li (Cortina) Lup Ng (Cortina) PAGE 2 Outline OFDM: motivation
More informationPage 1. What is a Survey? : Wireless Networks Lecture 8: Cellular Networks. Deliverables. Surveys. Cell splitting.
What is a Survey? 18-759: Wireless Networks Lecture 8: Cellular Networks Dina Papagiannaki & Peter Steenkiste Departments of Computer Science and Electrical and Computer Engineering Spring Semester 2009
More informationWiMAX/ Wireless WAN Case Study: WiMAX/ W.wan.6. IEEE 802 suite. IEEE802 suite. IEEE 802 suite WiMAX/802.16
W.wan.6-2 Wireless WAN Case Study: WiMAX/802.16 W.wan.6 WiMAX/802.16 IEEE 802 suite WiMAX/802.16 PHY Dr.M.Y.Wu@CSE Shanghai Jiaotong University Shanghai, China Dr.W.Shu@ECE University of New Mexico Albuquerque,
More informationKey technologies for future wireless systems
Key technologies for future wireless systems Dr. Kari Pehkonen Workshop on Future Wireless Communication Systems and Algorithms 12.8.2002 1 NOKIA 4G trends and drivers Many definitions for the term 4G
More informationOpportunistic Communication in Wireless Networks
Opportunistic Communication in Wireless Networks David Tse Department of EECS, U.C. Berkeley October 10, 2001 Networking, Communications and DSP Seminar Communication over Wireless Channels Fundamental
More informationAll Beamforming Solutions Are Not Equal
White Paper All Beamforming Solutions Are Not Equal Executive Summary This white paper compares and contrasts the two major implementations of beamforming found in the market today: Switched array beamforming
More informationGSM and WCDMA RADIO SYSTEMS ETIN15. Lecture no: Ove Edfors, Department of Electrical and Information Technology
RADIO SYSTEMS ETIN15 Lecture no: 11 GSM and WCDMA Ove Edfors, Department of Electrical and Information Technology Ove.Edfors@eit.lth.se 2015-05-12 Ove Edfors - ETIN15 1 Contents (Brief) history of mobile
More information6 Uplink is from the mobile to the base station.
It is well known that by using the directional properties of adaptive arrays, the interference from multiple users operating on the same channel as the desired user in a time division multiple access (TDMA)
More informationA Simulation Tool for Third Generation CDMA Systems Presentation to IEEE Sarnoff Symposium
A Simulation Tool for Third Generation CDMA Systems Presentation to IEEE Sarnoff Symposium March 22, 2000 Fakhrul Alam, William Tranter, Brian Woerner Mobile and Portable Radio Research Group () e-mail:
More informationMobile Radio Systems (Wireless Communications)
Mobile Radio Systems (Wireless Communications) Klaus Witrisal witrisal@tugraz.at Signal Processing and Speech Communication Lab, TU Graz Lecture 1 WS2015/16 (6 October 2016) Key Topics of this Lecture
More informationEE 577: Wireless and Personal Communications
EE 577: Wireless and Personal Communications Dr. Salam A. Zummo Lecture 1: Introduction 1 Common Applications of Wireless Systems AM/FM Radio Broadcast VHF and UHF TV Broadcast Cordless Phones (e.g., DECT)
More informationOrthogonal Frequency Division Multiplexing & Measurement of its Performance
Available Online at www.ijcsmc.com International Journal of Computer Science and Mobile Computing A Monthly Journal of Computer Science and Information Technology IJCSMC, Vol. 5, Issue. 2, February 2016,
More informationAccess Methods and Spectral Efficiency
Access Methods and Spectral Efficiency Yousef Dama An-Najah National University Mobile Communications Access methods SDMA/FDMA/TDMA SDMA (Space Division Multiple Access) segment space into sectors, use
More informationETSI SMG#24 TDoc SMG2 898 / 97 Madrid, Spain December 15-19, 1997 Source: SMG2. Concept Group Delta WB-TDMA/CDMA: Evaluation Summary
ETSI SMG#24 TDoc SMG2 898 / 97 Madrid, Spain December 15-19, 1997 Source: SMG2 Concept Group Delta WB-TDMA/CDMA: Evaluation Summary Introduction In the procedure to define the UMTS Terrestrial Radio Access
More informationSEN366 (SEN374) (Introduction to) Computer Networks
SEN366 (SEN374) (Introduction to) Computer Networks Prof. Dr. Hasan Hüseyin BALIK (8 th Week) Cellular Wireless Network 8.Outline Principles of Cellular Networks Cellular Network Generations LTE-Advanced
More informationAn OFDM Transmitter and Receiver using NI USRP with LabVIEW
An OFDM Transmitter and Receiver using NI USRP with LabVIEW Saba Firdose, Shilpa B, Sushma S Department of Electronics & Communication Engineering GSSS Institute of Engineering & Technology For Women Abstract-
More informationWhat s Behind 5G Wireless Communications?
What s Behind 5G Wireless Communications? Marc Barberis 2015 The MathWorks, Inc. 1 Agenda 5G goals and requirements Modeling and simulating key 5G technologies Release 15: Enhanced Mobile Broadband IoT
More informationEFFICIENT SMART ANTENNA FOR 4G COMMUNICATIONS
http:// EFFICIENT SMART ANTENNA FOR 4G COMMUNICATIONS 1 Saloni Aggarwal, 2 Neha Kaushik, 3 Deeksha Sharma 1,2,3 UG, Department of Electronics and Communication Engineering, Raj Kumar Goel Institute of
More informationPlanning of LTE Radio Networks in WinProp
Planning of LTE Radio Networks in WinProp AWE Communications GmbH Otto-Lilienthal-Str. 36 D-71034 Böblingen mail@awe-communications.com Issue Date Changes V1.0 Nov. 2010 First version of document V2.0
More informationWireless Transmission in Cellular Networks
Wireless Transmission in Cellular Networks Frequencies Signal propagation Signal to Interference Ratio Channel capacity (Shannon) Multipath propagation Multiplexing Spatial reuse in cellular systems Antennas
More informationMOBILE COMPUTING 4/8/18. Basic Call. Public Switched Telephone Network - PSTN. CSE 40814/60814 Spring Transit. switch. Transit. Transit.
MOBILE COMPUTING CSE 40814/60814 Spring 2018 Public Switched Telephone Network - PSTN Transit switch Transit switch Long distance network Transit switch Local switch Outgoing call Incoming call Local switch
More informationChapter 1 Acknowledgment:
Chapter 1 Acknowledgment: This material is based on the slides formatted by Dr Sunilkumar S. Manvi and Dr Mahabaleshwar S. Kakkasageri, the authors of the textbook: Wireless and Mobile Networks, concepts
More informationWireless WAN Case Study: WiMAX/ W.wan.6
Wireless WAN Case Study: WiMAX/802.16 W.wan.6 Dr.M.Y.Wu@CSE Shanghai Jiaotong University Shanghai, China Dr.W.Shu@ECE University of New Mexico Albuquerque, NM, USA W.wan.6-2 WiMAX/802.16 IEEE 802 suite
More informationChapter 14. Cellular Wireless Networks
Chapter 14 Cellular Wireless Networks Evolu&on of Wireless Communica&ons 1901 Marconi: Trans-Atlantic wireless transmission 1906 Fessenden: first radio broadcast (AM) 1921 Detroit Police Dept wireless
More informationATSC 3.0 Physical Layer Overview
ATSC 3.0 Physical Layer Overview Agenda Terminology Real world concerns Technology to combat those concerns Summary Basic Terminology What is OFDM? What is FEC? What is Shannon s Theorem? What does BER
More informationTSTE17 System Design, CDIO. General project hints. Behavioral Model. General project hints, cont. Lecture 5. Required documents Modulation, cont.
TSTE17 System Design, CDIO Lecture 5 1 General project hints 2 Project hints and deadline suggestions Required documents Modulation, cont. Requirement specification Channel coding Design specification
More informationDSRC using OFDM for roadside-vehicle communication systems
DSRC using OFDM for roadside-vehicle communication systems Akihiro Kamemura, Takashi Maehata SUMITOMO ELECTRIC INDUSTRIES, LTD. Phone: +81 6 6466 5644, Fax: +81 6 6462 4586 e-mail:kamemura@rrad.sei.co.jp,
More informationWireless Medium Access Control and CDMA-based Communication Lesson 14 CDMA2000
Wireless Medium Access Control and CDMA-based Communication Lesson 14 CDMA2000 1 CDMA2000 400 MHz, 800 MHz, 900 MHz, 1700 MHz, 1800 MHz, 1900 MHz, and 2100 MHz Compatible with the cdmaone standard A set
More informationCSC344 Wireless and Mobile Computing. Department of Computer Science COMSATS Institute of Information Technology
CSC344 Wireless and Mobile Computing Department of Computer Science COMSATS Institute of Information Technology Wireless Physical Layer Concepts Part III Noise Error Detection and Correction Hamming Code
More information3G/4G Mobile Communications Systems. Dr. Stefan Brück Qualcomm Corporate R&D Center Germany
3G/4G Mobile Communications Systems Dr. Stefan Brück Qualcomm Corporate R&D Center Germany Chapter VI: Physical Layer of LTE 2 Slide 2 Physical Layer of LTE OFDM and SC-FDMA Basics DL/UL Resource Grid
More informationOFDMA and MIMO Notes
OFDMA and MIMO Notes EE 442 Spring Semester Lecture 14 Orthogonal Frequency Division Multiplexing (OFDM) is a digital multi-carrier modulation technique extending the concept of single subcarrier modulation
More informationInterference management Within 3GPP LTE advanced
Interference management Within 3GPP LTE advanced Konstantinos Dimou, PhD Senior Research Engineer, Wireless Access Networks, Ericsson research konstantinos.dimou@ericsson.com 2013-02-20 Outline Introduction
More informationPage 1. Outline : Wireless Networks Lecture 6: Final Physical Layer. Direct Sequence Spread Spectrum (DSSS) Spread Spectrum
Outline 18-759 : Wireless Networks Lecture 6: Final Physical Layer Peter Steenkiste Dina Papagiannaki Spring Semester 2009 http://www.cs.cmu.edu/~prs/wireless09/ Peter A. Steenkiste 1 RF introduction Modulation
More informationLevel 6 Graduate Diploma in Engineering Wireless and mobile communications
9210-119 Level 6 Graduate Diploma in Engineering Wireless and mobile communications Sample Paper You should have the following for this examination one answer book non-programmable calculator pen, pencil,
More informationRequirements for GPRS Evolution Towards Providing Third Generation Services
Requirements for GPRS Evolution Towards Providing Third Generation Services Håkan Olofsson Ericsson Radio Systems AB Outline GPRS Background GPRS Role in Future Communications Higher bit rates: EGPRS Improved
More informationMultiple Access System
Multiple Access System TDMA and FDMA require a degree of coordination among users: FDMA users cannot transmit on the same frequency and TDMA users can transmit on the same frequency but not at the same
More informationTest Range Spectrum Management with LTE-A
Test Resource Management Center (TRMC) National Spectrum Consortium (NSC) / Spectrum Access R&D Program Test Range Spectrum Management with LTE-A Bob Picha, Nokia Corporation of America DISTRIBUTION STATEMENT
More informationRedline Communications Inc. Combining Fixed and Mobile WiMAX Networks Supporting the Advanced Communication Services of Tomorrow.
Redline Communications Inc. Combining Fixed and Mobile WiMAX Networks Supporting the Advanced Communication Services of Tomorrow WiMAX Whitepaper Author: Frank Rayal, Redline Communications Inc. Redline
More informationMultiple Access Techniques
Multiple Access Techniques EE 442 Spring Semester Lecture 13 Multiple Access is the use of multiplexing techniques to provide communication service to multiple users over a single channel. It allows for
More informationOutline / Wireless Networks and Applications Lecture 7: Physical Layer OFDM. Frequency-Selective Radio Channel. How Do We Increase Rates?
Page 1 Outline 18-452/18-750 Wireless Networks and Applications Lecture 7: Physical Layer OFDM Peter Steenkiste Carnegie Mellon University RF introduction Modulation and multiplexing Channel capacity Antennas
More informationCellular Wireless Networks. Chapter 10
Cellular Wireless Networks Chapter 10 Cellular Network Organization Use multiple low-power transmitters (100 W or less) Areas divided into cells Each cell is served by base station consisting of transmitter,
More informationLecture 3: Wireless Physical Layer: Modulation Techniques. Mythili Vutukuru CS 653 Spring 2014 Jan 13, Monday
Lecture 3: Wireless Physical Layer: Modulation Techniques Mythili Vutukuru CS 653 Spring 2014 Jan 13, Monday Modulation We saw a simple example of amplitude modulation in the last lecture Modulation how
More information3.6. Cell-Site Equipment. Traffic and Cell Splitting Microcells, Picocelles and Repeaters
3.6. Cell-Site Equipment Traffic and Cell Splitting Microcells, Picocelles and Repeaters The radio transmitting equipment at the cell site operates at considerably higher power than do the mobile phones,
More information