Mobile Communication Systems. Part 7- Multiplexing
|
|
- Andrea Fisher
- 6 years ago
- Views:
Transcription
1 Mobile Communication Systems Part 7- Multiplexing Professor Z Ghassemlooy Faculty of Engineering and Environment University of Northumbria U.K.
2 Contents Multiple Access Multiplexing SDM FDM TDM CDM Wideband Schemes Duplex Method
3 Multiple Access In today s data communications systems there is a need for several users to share a common channel resource at the same time. The resource could be: high speed optical fibre links between continents frequency spectrum in a cellular telephone system twisted pair ethernet cable in the office
4 Multiple Access For multiple users to be able to share a common resource in a managed and effective way, it requires: Some form of access protocol Defines how or when the sharing is to take place and the means for identifying individual messages. Process is known as multiplexing in wired networks and multiple access in wireless digital communications.
5 Multiplexing/Multiple Access There four possible ways to divide the frequency spectrum among many channels: Space-division multiplexing (SDM) Frequency-division multiplexing (FDM) / Frequency Division Multiple Access (FDMA) Time-division multiplexing (TDM) / Time Division Multiple Access (TDMA) Code-division multiplexing (CDM) / Code Division Multiple Access (CDMA)
6 Space-division Multiplexing (SDM) The spatial dimension is used for multiplexing Data stream are transmitted over, non-overlapping transmission channels Uses spot beam antennas Base station tracks user when moving Cover areas with same frequency as TDMA, CDMA, and FDMA Can be achieved using: Beam forming Sectorization k 1 s 1 c channels k i k 2 k 3 k 4 k 5 k 6 t f c s 2 t c t f But, needs perfect adaptive antenna system: infinitely large antenna needed Compromise needed s 3 f
7 Frequency Multiplexing I Dividing the entire frequency spectrum into smaller bands A frequency band (carrier) is allocated per channel for the entire transmission time FDM, used in 1st generation systems (wastes spectrum), GSM and UMTS FDD Mode Two bands of frequencies for every user Advantages: lower channel bit rate (than TDM) means less susceptible to multi path ISI requires coordination works also for analog signals in contrast to TDM, each stream can continuously transmit within its subband t code k 1 k 2 k 3 k 4 k 5 k 6 f
8 Frequency Multiplexing II OFDM Is an efficient FDMs, which offers minimum spacing of the subbands without ISI Frequency Division Multiple Access In multiple access schemes, where different data streams belong to different users Disadvantages In-efficient use of bandwidth if the traffic is distributed unevenly Requires guard band between channels Cannot readily support variable user data rates, fixed channel width means fixed bit rate Number of channels in a FDMA system N number of channels Bt total spectrum allocation Bguard guard band Bc channel bandwidth
9 Time multiplexing I Entire spectrum is allocated for a channel some of the time. multiple users share a single radio channel For 2nd generation Uses time for forward and reverse link Advantages: Only one carrier in the medium at any given time High throughput even for many users Common TX component design, only one power amplifier Disadvantages: precise synchronization necessary requires terminal to support a much higher data rate than the user information rate t k 1 code k 2 k 3 k 4 k 5 k 6 f
10 Example TDMA System GSM is a good example of a TDMA system GSM ( MHz) handsets transmit data at a rate of 270 kbit/s in a 200 khz channel using GMSK modulation. Each frequency channel is assigned 8 users, each having a basic data rate of around 13 kbit/s Signal is divided by time using the fundamental unit of a burst period. This burst period = 15/26 ms and is grouped together by 8 bursts into a frame. A single traffic channel is defined by grouping 26 frames together; giving a total timeframe of 120 ms. These traffic channels are used to transfer speech and data. Number of channels
11 TDMA Frame TDMA used for the 3G air interface A frame length: ms and it consist of 64 1/64 time slots of length 72 usec 16 1/16 time slots of length 288 usec Downlink Uplink 72ms 288ms Switching point between uplink and downlink Efficiency: It is a measure of the percentage of transmitted data that contains information as opposed to providing overhead for the access scheme f : Frame efficiency b OH : Number of overhead bits per frame b T : Total number of bits per frame f = (1-b OH /b T )*100%
12 Time and Frequency Multiplexing I Combination of both methods A certain frequency band for a given amount of time is allocated per channel Example: GSM Advantages: Improved protection against tapping and frequency selective interference Higher data rates compared to code code multiplex Disadvantages: Requires precise coordination k 1 k 2 k 3 k 4 k 5 k 6 f t
13 Code Division Multiplexing Each channel has a unique spreading code. All channels use the same spectrum at the same time. Spreading codes should as far as possible be orthogonal to each other to reduce interference The codes, one/zero sequences, used to differentiate signals, are designed and generated at a much higher rate than the baseband information. This rate is referred to as a chip rate rather than a bit rate. k 1 k 2 k 3 k 4 k 5 k 6 t coding f Spreading factor = Chip rate/data rate
14 Code Division Multiplexing Advantages: bandwidth efficient and good power control no need for coordination and synchronization good protection against interference and tapping Disadvantages: lower user data rates more complex signal regeneration Implemented using spread spectrum technology
15 CDMA Classification CDMA : direct sequence (DS) CDMA : frequency hopping (FH) Carrier frequency changes periodically, after T secs Hopping pattern determined by spread code CDMA : time hopping (TH) Data transmitted in rapid bursts Time intervals determined by code Frequency Direct sequence Frequency hopping Time hopping Time
16 Direct Sequence CDMA Directly modulated, discrete time, discrete valued code signal Analogue or Digital Code bits are chips ( 1) Rate of Code >> Rate of Data PSK, BPSK, D-BPSK, QPSK or MPSK Data DS-SS Transmitter Data modulator Spreading modulation Carrier generator Code generator
17 DS-SS Transmitter & Receiver Binary Data X Wideband modulator Despreading Data demodulator Binary Data Code generator Carrier generator Code Synchronisation/trac king Code generator Carrier generator
18 CDMA Evolution Early Stages Narrowband Wideband 1949 John Pierce : time hopping spread spectrum 1949 Claude Shannon and Robert Pierce : basic ideas of CDMA 1950 De Rosa-Rogoff : direct sequence spread spectrum 1956 Price and Green antimultipath : RAKE patent 1961 Magnuski : near-far problem 1970s Several developments for military field and navigation systems 1978 Cooper and Nettleton : cellular application of spread spectrum 1980s Investigation of narrowband CDMA techniques for cellular applications 1986 Formulation of optimum multiuser detection by Verdu 1993 IS-95 standard Europe : FRAMES FMA2 Japan : Core-A WCDMA USA : cdma2000 Korea : TTA I, TTA II 2000s Commercialization of wideband CDMA systems
19 Wideband-CDMA Framing structure Radio Frame (10ms) frame #i frame #i+1 Time Slot (2560*T c ) timeslot #0 timeslot #1 timeslot #2 timeslot #13 timeslot #14 T c = chip time = 1 / 3.84 ms
20 High Speed Wireless Access Mobile communication system Up to 30 Mbps Using the SHF and other band (3-60 GHz) Used for mobile video telephone conversations
21 Ultra High Speed Wireless LAN Wireless LAN Up to 156 Mbps Using the millimeter wave radio band ( GHz) Used for high quality TV conferences.
22 5GHz Band Mobile Access Two types ATM type Wireless Access Ethernet type Wireless LAN Using 5GHz band Each system can transmit at up to 20-25Mbps Used for multimedia information
23 High Data Rate Wireless LAN Evolution Gigabit Ethernet (1G bit/s) Fast Ethernet (100M bit/s) Ethernet (10M bit/s) ATM Ethernet (10M bit/s) Conventional 2.4GHz Ethernet Wireless LAN 2M bit/s Future 5GHz ATM Wireless LAN 25M bit/s 5GHz Ethernet Wireless LAN (IEEE802.11) 36Mbit/s IMT kbit/s 2Mbit/s ARIB, Japan, 1999
24 Wireless Home-Link Wireless Home-Link Up to 100Mbps Using the SHF and other band(3-60ghz) Between PCs and Audio Visual equipments Multimedia information.
25 Home Link Concept Display Personal Computer 5 GHz Display CATV DVD VTR Telephone line Personal Computer 5 GHz Display Personal Computer Satellite Tuner
26 Duplex Methods Separating the send and receive signals (remember full duplex). Two approaches: Frequency Division Duplex (FDD) Uses a pair of frequency bands one for uplink and another for downlink used in all second generation cellular systems requires good frequency separation filters - diplexer Time Division Duplex (TDD) Uses a single frequency band for both uplink and downlink sharing the transmission time propagation delay limits cell size very efficient for asymmetric traffic, e.g. internet download used in cordless systems (DECT) and wireless LANs
27 What is Universal Mobile Telecommunication System? European name for third generation (3G) radio system (1G = analog, 2G = digital voice and low speed data (GSM)) Key features with respect to 2G: Integration of fixed and mobile networks Expanded range of services (Packet, Internet, Multimedia) Bit rates: Rural outdoor: 144 kb/s, 500 km/h Suburban outdoor: 384 kb/s, 120 km/h Indoor, low range outdoor: 2Mb/s, 10 km/h Flexibility: Variable bit rates Circuit switched and packet oriented bearers Negotiation of bearer service attributes (bearer type, bit rate, delay BER, up/down symmetry, protection) Adaptability to quality, traffic, network load & radio conditions
28 Summary Multiple Access - sharing resources Frequency Division Multiple Access - FDMA Time Division Multiple Access - TDMA [Code Division Multiple Access CDMA] Duplex Methods Frequency Division Duplex - FDD Time Division Duplex - TDD
29 Questions and Answers Tell me what you think about this lecture
Multiple Access Schemes
Multiple Access Schemes Dr Yousef Dama Faculty of Engineering and Information Technology An-Najah National University 2016-2017 Why Multiple access schemes Multiple access schemes are used to allow many
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 7 Multiple Division Techniques for Traffic Channels
Introduction to Wireless & Mobile Systems Chapter 7 Multiple Division Techniques for Traffic Channels Outline Introduction Concepts and Models for Multiple Divisions Frequency Division Multiple Access
More informationEEE 309 Communication Theory
EEE 309 Communication Theory Semester: January 2016 Dr. Md. Farhad Hossain Associate Professor Department of EEE, BUET Email: mfarhadhossain@eee.buet.ac.bd Office: ECE 331, ECE Building Part 08 Multiplexing
More informationISHIK UNIVERSITY Faculty of Science Department of Information Technology Fall Course Name: Wireless Networks
ISHIK UNIVERSITY Faculty of Science Department of Information Technology 2017-2018 Fall Course Name: Wireless Networks Agenda Lecture 4 Multiple Access Techniques: FDMA, TDMA, SDMA and CDMA 1. Frequency
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 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 informationCellular systems 02/10/06
Cellular systems 02/10/06 Cellular systems Implements space division multiplex: base station covers a certain transmission area (cell) Mobile stations communicate only via the base station Cell sizes from
More informationWireless Networks. Why Wireless Networks? Wireless Local Area Network. Wireless Personal Area Network (WPAN)
Wireless Networks Why Wireless Networks? rate MBit/s 100.0 10.0 1.0 0.1 0.01 wired terminals WMAN WLAN CORDLESS (CT, DECT) Office Building stationary walking drive Indoor HIPERLAN UMTS CELLULAR (GSM) Outdoor
More informationIntroduction to Wireless and Mobile Networking. Hung-Yu Wei g National Taiwan University
Introduction to Wireless and Mobile Networking Lecture 3: Multiplexing, Multiple Access, and Frequency Reuse Hung-Yu Wei g National Taiwan University Multiplexing/Multiple Access Multiplexing Multiplexing
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 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 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 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 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 informationChapter 2: Wireless Transmission. Mobile Communications. Spread spectrum. Multiplexing. Modulation. Frequencies. Antenna. Signals
Mobile Communications Chapter 2: Wireless Transmission Frequencies Multiplexing Signals Spread spectrum Antenna Modulation Signal propagation Cellular systems Prof. Dr.-Ing. Jochen Schiller, http://www.jochenschiller.de/
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 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 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 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 informationAPPLICATION PROGRAMMING: MOBILE COMPUTING [ INEA00112W ] Marek Piasecki PhD Wireless Telecommunication
APPLICATION PROGRAMMING: MOBILE COMPUTING [ INEA00112W ] Marek Piasecki PhD Wireless Telecommunication (W6/2013) What is Wireless Communication? Transmitting/receiving voice and data using electromagnetic
More informationINTRODUCTION TO COMMUNICATION SYSTEMS AND TRANSMISSION MEDIA
COMM.ENG INTRODUCTION TO COMMUNICATION SYSTEMS AND TRANSMISSION MEDIA 9/9/2017 LECTURES 1 Objectives To give a background on Communication system components and channels (media) A distinction between analogue
More informationCSCD 433 Network Programming Fall Lecture 5 Physical Layer Continued
CSCD 433 Network Programming Fall 2016 Lecture 5 Physical Layer Continued 1 Topics Definitions Analog Transmission of Digital Data Digital Transmission of Analog Data Multiplexing 2 Different Types of
More informationBluetooth BlueTooth - Allows users to make wireless connections between various communication devices such as mobile phones, desktop and notebook comp
ECE 271 Week 8 Bluetooth BlueTooth - Allows users to make wireless connections between various communication devices such as mobile phones, desktop and notebook computers - Uses radio transmission - Point-to-multipoint
More informationMultiple Access Technique Lecture 8
Multiple Access Technique Lecture 8 Ir. Muhamad Asvial, MEng., PhD Center for Information and Communication Engineering Research Electrical Engineering Department University of Indonesia Kampus UI Depok,
More informationLecture 2. Mobile Evolution Introduction to Spread Spectrum Systems. COMM 907:Spread Spectrum Communications
COMM 907: Spread Spectrum Communications Lecture 2 Mobile Evolution Introduction to Spread Spectrum Systems Evolution of Mobile Telecommunications Evolution of Mobile Telecommunications Evolution of Mobile
More informationCOMM 907:Spread Spectrum Communications
COMM 907: Spread Spectrum Communications Dr. Ahmed El-Mahdy Professor in Communications Department The German University in Cairo Text Book [1] R. Michael Buehrer, Code Division Multiple Access (CDMA),
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 informationUNIK4230: Mobile Communications. Abul Kaosher
UNIK4230: Mobile Communications Abul Kaosher abul.kaosher@nsn.com Multiple Access Multiple Access Introduction FDMA (Frequency Division Multiple Access) TDMA (Time Division Multiple Access) CDMA (Code
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 informationCDMA - QUESTIONS & ANSWERS
CDMA - QUESTIONS & ANSWERS http://www.tutorialspoint.com/cdma/questions_and_answers.htm Copyright tutorialspoint.com 1. What is CDMA? CDMA stands for Code Division Multiple Access. It is a wireless technology
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 informationMobile & Wireless Networking. Lecture 2: Wireless Transmission (2/2)
192620010 Mobile & Wireless Networking Lecture 2: Wireless Transmission (2/2) [Schiller, Section 2.6 & 2.7] [Reader Part 1: OFDM: An architecture for the fourth generation] Geert Heijenk Outline of Lecture
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 informationChapter 2 Overview. Duplexing, Multiple Access - 1 -
Chapter 2 Overview Part 1 (2 weeks ago) Digital Transmission System Frequencies, Spectrum Allocation Radio Propagation and Radio Channels Part 2 (last week) Modulation, Coding, Error Correction Part 3
More informationCSCD 433 Network Programming Fall Lecture 5 Physical Layer Continued
CSCD 433 Network Programming Fall 2016 Lecture 5 Physical Layer Continued 1 Topics Definitions Analog Transmission of Digital Data Digital Transmission of Analog Data Multiplexing 2 Different Types of
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 informationW-CDMA for UMTS Principles
W-CDMA for UMTS Principles Introduction CDMA Background/ History Code Division Multiple Access (CDMA) Why CDMA? CDMA Principles / Spreading Codes Multi-path Radio Channel and Rake Receiver Problems to
More informationMultiple Access. Difference between Multiplexing and Multiple Access
Multiple Access (MA) Satellite transponders are wide bandwidth devices with bandwidths standard bandwidth of around 35 MHz to 7 MHz. A satellite transponder is rarely used fully by a single user (for example
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 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 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 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 informationChapter 7. Multiple Division Techniques
Chapter 7 Multiple Division Techniques 1 Outline Frequency Division Multiple Access (FDMA) Division Multiple Access (TDMA) Code Division Multiple Access (CDMA) Comparison of FDMA, TDMA, and CDMA Walsh
More informationMultiple Access Techniques
Multiple Access Techniques Instructor: Prof. Dr. Noor M. Khan Department of Electrical Engineering, Faculty of Engineering, Mohammad Ali Jinnah University, Islamabad Campus, Islamabad, PAKISTAN Ph: +92
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 informationECS455: Chapter 4 Multiple Access
ECS455: Chapter 4 Multiple Access Asst. Prof. Dr. Prapun Suksompong prapun@siit.tu.ac.th 1 Office Hours: BKD 3601-7 Tuesday 9:30-10:30 Tuesday 13:30-14:30 Thursday 13:30-14:30 ECS455: Chapter 4 Multiple
More informationWireless Transmission:
Wireless Transmission: Physical Layer Aspects and Channel Characteristics Frequencies Signals Antenna Signal propagation Multiplexing Modulation Spread spectrum Cellular systems 1 Frequencies for communication
More informationStructure of the Lecture
Structure of the Lecture Chapter 2 Technical Basics: Layer Methods for Medium Access: Layer 2 Channels in a frequency band Static medium access methods Flexible medium access methods Chapter 3 Wireless
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 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 informationSpread Spectrum: Definition
Spread Spectrum: Definition refers to the expansion of signal bandwidth, by several orders of magnitude in some cases, which occurs when a key is attached to the communication channel an RF communications
More informationPERFORMANCE ANALYSIS OF DOWNLINK POWER CONTROL IN WCDMA SYSTEM
PERFORMANCE ANALYSIS OF DOWNLINK POWER CONTROL IN WCDMA SYSTEM Dr. M. Mahbubur Rahman, Md. Khairul Islam, Tarek Hassan-Al-Mahmud, A. R. Mahmud Abstract: WCDMA (Wideband Code Division Multiple Access) plays
More informationData and Computer Communications. Tenth Edition by William Stallings
Data and Computer Communications Tenth Edition by William Stallings Data and Computer Communications, Tenth Edition by William Stallings, (c) Pearson Education, 2013 CHAPTER 8 Multiplexing It was impossible
More informationLecture LTE (4G) -Technologies used in 4G and 5G. Spread Spectrum Communications
COMM 907: Spread Spectrum Communications Lecture 10 - LTE (4G) -Technologies used in 4G and 5G The Need for LTE Long Term Evolution (LTE) With the growth of mobile data and mobile users, it becomes essential
More informationMobile Communication and Mobile Computing
Department of Computer Science Institute for System Architecture, Chair for Computer Networks Mobile Communication and Mobile Computing Prof. Dr. Alexander Schill http://www.rn.inf.tu-dresden.de Structure
More informationIMT-2000 members UTRA-TDD and UTRA-FDD
IMT-2000 members UTRA-TDD and UTRA-FDD Dr. Christian Menzel, SIEMENS AG christian.menzel@icn.siemens.de Author Siemens AG, Munich Siemens AG 2000 IMT-2000_UTRA_TDD_FDD_1 UTRA (FDD + TDD)! IMT-2000 and
More informationQuestion Points Score Total 100
THE UNIVERSITY OF HONG KONG FACULTY OF ENGINEERING DEPARTMENT OF COMPUTER SCIENCE CSIS 7304 The Wireless Internet and Mobile Computing (Midterm Examination) Date: July, 006 Time: 7:00pm 9:00pm Question
More informationConcept Group Alpha Wideband Direct-Sequence CDMA: Evaluation Summary
ETSI SMG#24 TDoc SMG2 904 / 97 Madrid, Spain December 15-19, 1997 Agenda item 4.1: UTRA Source: SMG2 Concept Group Alpha Wideband Direct-Sequence CDMA: Evaluation Summary Title: Summary of the Concept
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 informationPolitecnico di Milano Scuola di Ingegneria Industriale e dell Informazione. Physical layer. Fundamentals of Communication Networks
Politecnico di Milano Scuola di Ingegneria Industriale e dell Informazione Physical layer Fundamentals of Communication Networks 1 Disclaimer o The basics of signal characterization (in time and frequency
More informationMobile Computing. Chapter 3: Medium Access Control
Mobile Computing Chapter 3: Medium Access Control Prof. Sang-Jo Yoo Contents Motivation Access methods SDMA/FDMA/TDMA Aloha Other access methods Access method CDMA 2 1. Motivation Can we apply media access
More informationIntroduction to GSM. Introduction to GSM, page Development of GSM. History of GSM. Market situation. GSM s future development
Introduction to GSM, page 1 Introduction to GSM 1. Development of GSM History of GSM Market situation GSM s future development Services offered by GSM GSM specifications 2. OSI reference model 3. RF interface
More informationUMTS: Universal Mobile Telecommunications System
Department of Computer Science Institute for System Architecture, Chair for Computer Networks UMTS: Universal Mobile Telecommunications System Mobile Communication and Mobile Computing Prof. Dr. Alexander
More informationAn Introduction to Wireless Technologies Part 2. F. Ricci 2008/2009
An Introduction to Wireless Technologies Part 2 F. Ricci 2008/2009 Content Multiplexing Medium access control Medium access control (MAC): FDMA = Frequency Division Multiple Access TDMA = Time 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 informationChapter 1 INTRODUCTION
Chapter 1 INTRODUCTION 1 The History of Mobile Radio Communication (1/3) 1880: Hertz Initial demonstration of practical radio communication 1897: Marconi Radio transmission to a tugboat over an 18 mi path
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 & Media Access
Wireless Transmission & Media Access Signals and Signal Propagation Multiplexing Modulation Media Access 1 Significant parts of slides are based on original material by Prof. Dr.-Ing. Jochen Schiller,
More informationGuide to Wireless Communications, Third Edition Cengage Learning Objectives
Guide to Wireless Communications, Third Edition Chapter 9 Wireless Metropolitan Area Networks Objectives Explain why wireless metropolitan area networks (WMANs) are needed Describe the components and modes
More informationMultiplexing. Rab Nawaz Jadoon DCS. Assistant Professor. Department of Computer Science. COMSATS Institute of Information Technology
Multiplexing Rab Nawaz Jadoon DCS Assistant Professor COMSATS IIT, Abbottabad Pakistan COMSATS Institute of Information Technology Mobile Communication Multiplexing Multiplexing describes how several users
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 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 informationDirect Link Communication II: Wireless Media. Current Trend
Direct Link Communication II: Wireless Media Current Trend WLAN explosion (also called WiFi) took most by surprise cellular telephony: 3G/4G cellular providers/telcos/data in the same mix self-organization
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 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 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 informationRADIO SYSTEMS ETIN15. Lecture no: GSM and WCDMA. 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 1 Contents (Brief) history of mobile telephony Global System for
More informationData and Computer Communications. Tenth Edition by William Stallings
Data and Computer Communications Tenth Edition by William Stallings Data and Computer Communications, Tenth Edition by William Stallings, (c) Pearson Education - 2013 CHAPTER 10 Cellular Wireless Network
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 informationITM 1010 Computer and Communication Technologies
ITM 1010 Computer and Communication Technologies Lecture #14 Part II Introduction to Communication Technologies: Digital Signals: Digital modulation, channel sharing 2003 香港中文大學, 電子工程學系 (Prof. H.K.Tsang)
More informationAn Introduction to Wireless Technologies Part 2. F. Ricci
An Introduction to Wireless Technologies Part 2 F. Ricci Content Medium access control (MAC): FDMA = Frequency Division Multiple Access TDMA = Time Division Multiple Access CDMA = Code Division Multiple
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 informationPart 3. Multiple Access Methods. p. 1 ELEC6040 Mobile Radio Communications, Dept. of E.E.E., HKU
Part 3. Multiple Access Methods p. 1 ELEC6040 Mobile Radio Communications, Dept. of E.E.E., HKU Review of Multiple Access Methods Aim of multiple access To simultaneously support communications between
More informationMedium Access Control. Wireless Networks: Guevara Noubir. Slides adapted from Mobile Communications by J. Schiller
Wireless Networks: Medium Access Control Guevara Noubir Slides adapted from Mobile Communications by J. Schiller S200, COM3525 Wireless Networks Lecture 4, Motivation Can we apply media access methods
More informationWCDMA Basics Chapter 2 OBJECTIVES:
WCDMA Basics Chapter 2 This chapter is designed to give the students a brief review of the WCDMA basics of the WCDMA Experimental System. This is meant as a review only as the WCDMA basics have already
More informationWireless Communications
2. Physical Layer DIN/CTC/UEM 2018 Periodic Signal Periodic signal: repeats itself in time, that is g(t) = g(t + T ) in which T (given in seconds [s]) is the period of the signal g(t) The number of cycles
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 informationWireless Broadband Networks
Wireless Broadband Networks WLAN: Support of mobile devices, but low data rate for higher number of users What to do for a high number of users or even needed QoS support? Problem of the last mile Provide
More informationReti di Telecomunicazione. Channels and Multiplexing
Reti di Telecomunicazione Channels and Multiplexing Point-to-point Channels They are permanent connections between a sender and a receiver The receiver can be designed and optimized based on the (only)
More informationEE 304 TELECOMMUNICATIONs ESSENTIALS HOMEWORK QUESTIONS AND ANSWERS
Homework Question 1 EE 304 TELECOMMUNICATIONs ESSENTIALS HOMEWORK QUESTIONS AND ANSWERS Allocated channel bandwidth for commercial TV is 6 MHz. a. Find the maximum number of analog voice channels that
More informationSOME PHYSICAL LAYER ISSUES. Lecture Notes 2A
SOME PHYSICAL LAYER ISSUES Lecture Notes 2A Delays in networks Propagation time or propagation delay, t prop Time required for a signal or waveform to propagate (or move) from one point to another point.
More informationDirect Link Communication II: Wireless Media. Motivation
Direct Link Communication II: Wireless Media Motivation WLAN explosion cellular telephony: 3G/4G cellular providers/telcos in the mix self-organization by citizens for local access large-scale hot spots:
More informationDepartment of Computer Science Institute for System Architecture, Chair for Computer Networks
Department of Computer Science Institute for System Architecture, Chair for Computer Networks LTE, WiMAX and 4G Mobile Communication and Mobile Computing Prof. Dr. Alexander Schill http://www.rn.inf.tu-dresden.de
More informationECE 476/ECE 501C/CS Wireless Communication Systems Winter Lecture 2: Overview of Modern Wireless Communication Systems
ECE 476/ECE 501C/CS 513 - Wireless Communication Systems Winter 2004 Lecture 2: Overview of Modern Wireless Communication Systems Last lecture we looked at an introduction to the course. History FCC and
More informationChannel partitioning protocols
Wireless Networks a.y. 2010-2011 Channel partitioning protocols Giacinto Gelli DIBET gelli@unina.it 1 Outline Introduction Duplexing techniques FDD TDD Channel partitioning techniques FDMA TDMA CDMA Hybrid
More informationT325 Summary T305 T325 B BLOCK 3 4 PART III T325. Session 11 Block III Part 3 Access & Modulation. Dr. Saatchi, Seyed Mohsen.
T305 T325 B BLOCK 3 4 PART III T325 Summary Session 11 Block III Part 3 Access & Modulation [Type Dr. Saatchi, your address] Seyed Mohsen [Type your phone number] [Type your e-mail address] Prepared by:
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 informationCS 218 Fall 2003 October 23, 2003
CS 218 Fall 2003 October 23, 2003 Cellular Wireless Networks AMPS (Analog) D-AMPS (TDMA) GSM CDMA Reference: Tanenbaum Chpt 2 (pg 153-169) Cellular Wireless Network Evolution First Generation: Analog AMPS:
More information