Project: IEEE P Working Group for Wireless Personal Area Networks N

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1 Project: IEEE P8.5 Working Grou or Wirele Peronal Area Network N (WPAN) Submiion Title: M-ary Code Shit Keying/Binary PPM (MCSK/BPPM) Baed Imule Radio Date Submitted: January 5 Source: [Dong In Kim (), Serhat Erküçük (), Kyung Su Kwak ()] Comany: [() Simon Fraer Univerity, ()UWB-ITRC, Inha Univerity] Addre: [() School o Engineering Science, 8888 Univerity Drive, Burnaby, BC V5A S6, Canada () 53 Yonghyun-Dong, Nam-Gu, #4, Venture Bldg. Incheon, 4-75 Korea] Voice: [+ (64) 9-348], Fax: [() + (64) () ] [() dikim@u.ca () kkwak@inha.ac.kr] Abtract: [Prooed modulation ormat increae the ranging and location caability o time hoing imule radio] Puroe: [Prooal or the IEEE8.5.4a tandard] Notice: Thi document ha been reared to ait the IEEE P8.5. It i oered a a bai or dicuion and i not binding on the contributing individual() or organization(). The material in thi document i ubject to change in orm and content ater urther tudy. The contributor() reerve() the right to add, amend or withdraw material contained herein. Releae: The contributor acknowledge and accet that thi contribution become the roerty o IEEE and may be made ublicly available by P8.5. Submiion Slide

2 Prooal or IEEE Alternate PHY M-ary Code Shit Keying/Binary PPM (MCSK/BPPM) Baed Imule Radio SFU, Canada & UWB-ITRC, Inha Univerity Reublic o Korea Submiion Slide

3 Motivation MCSK/BPPM increae the location/ranging caability o exiting Time Hoing (TH) Imule Radio (IR) H/W comlexity i not increaed Same ignal ace with reect to TH-BPPM MCSK can be alied to other TH-IR; eg. MCSK/BPSK Submiion Slide 3

4 Content TG4a Requirement MCSK/BPPM PHY TX Structure TH Code Aignment Tranceiver Architecture Inormation Rate Location Accuracy Concluion Submiion Slide 4

5 TG4a Requirement 8.5.4a PHY calable inormation rate high reciion ranging/ location low ower conumtion low comlexity and cot MCSK/BPPM comared to TH-BPPM Better erormance at the ame/higher inormation rate and lower tranmit ower Imroved ranging/location reciion caability Lower tranmit ower at the ame/higher inormation rate and better erormance No new circuit i needed / imle tranceiver tructure *MCSK/BPPM: M-ary Code Shit Keying/Binary Pule Poition Modulation **TH-BPPM: Time Hoing Binary Pule Poition Modulation Submiion Slide 5

6 MCSK/BPPM d ) ( = TH PPM uer # [...] uer eciic TH code d ) ( = M=4 MCSK/BPPM uer # [...] chooe a code MCSK: M-ary Code Shit Keying BPPM: Binary Pule Poition Modulation TH-BPPM only or multile acce TH-BPPM T b T b 3T b T b T b 3T b TX t t M uer eciic TH code TH code c3 or multile acce and data modulation Submiion Slide 6 T b T : : Bit time Frame time

7 PHY TX Structure (/) TX M uer eciic TH code - TH code are eriodic with N - each ule hould be reeated N time - N/N=k i an integer Examle: M = 4, N = 8, N = 4 d = [... ] MCSK c c TH = c c 3 7 = C T b Tb T T 3T 4T 5T 6T 7T 8T t d = [... ] BPPM Submiion Slide 7 T b T : : Bit time Frame time

8 PHY TX Structure (/) TX M uer eciic TH code - TH code are eriodic with N - each ule hould be reeated N time - N/N=k i an integer Inormation rate v. erormance or ixed N and varying N and M Scenario N / N = M = 4 Time domain illutration bit (MCSK) bit (BPPM) T b N/N ame Ino. rate erormance N M N M / N = = 8 / N = = 8 3 bit (MCSK) bit (BPPM) bit (BPPM) Submiion Slide 8 T b 3 bit (MCSK) Tb bit (BPPM) M increaing Tb M ame N/N increaing T : Bit time T : b Frame time

9 TH Code Aignment (/) TX Each uer ha M uer eciic TH code N u N M amle-long equence? NO! Generation o TH code Cae : random aignment T m-equence: 4 c For T = n, Tc = n: lot or multile acce c c l N ; l = 6, N = 64 [...] uer # N c3 [ ] N = 4 M = u N c N u c c c3 uer # ( N + M ) h h Submiion Slide 9

10 TH Code Aignment (/) Generation o TH code Cae : no overlaing uer # uer # TX [ ] N M = = 4 4 uer # [ ] [ 55 7 ] [ ] [ 7 3 ] [ 7 3 3] no colliion allowed within uer code Submiion Slide... uer # uer #k [ ] ( N + M ) n Nu N Nu + n: number o overla

11 General Modulation Format TX Fixed ignal ace Increaed inormation rate Extra inormation Random election o TH code Imroved ectrum R log = + N / M N R Submiion Slide

12 Receiver Structure - MLSE RX M M temlate ignal M N/N hardware tructure correlator comutation comlexity ( N / N ) M Submiion Slide

13 Inormation Rate (/3) TH-BPPM A T T R log M = + N / N N =, M= Ino. rate R R R MCSK/BPPM Contant Energy/Bit Contraint N =, N=, M= A T T R MCSK/BPPM Contant Power Contraint N =, N=, M= A T T R MCSK/BPPM (ame ino. rate) Contant Power Contraint N =, N=, M= A T T can be adjuted to achieve higher inormation rate at lower tranmit ower and till maintain better erormance at the ame time A = R log M + N / N M T log = + N / N A T Submiion Slide 3

14 N N = January 5 Inormation Rate (/3) A A =A T T T T = 4T 3T A MCSK/BPPM Contant Power Contraint or N =, M=8 Scalable ino. rate 4R R R log M = + N / N erormance (wrt TH-BPPM) R - increaed SNR - reduced colluion - no roceing gain - not much imrovement N N = A =.58A T T T T 3T 4T A T T = 5 T.5R R - increaed SNR - reduced colluion - roceing gain - imroved - TX ower can be lowered - ino rate can be increaed N N = 3 A =.4A T T T T = T 3T 4T 5T 6T Submiion Slide 4 3T R R A = log M + N / N M T log = + N / N A T

15 Inormation Rate (3/3) Contant Power Contraint Imroved erormance at the ame inormation rate or M=8 Power Cont., Same Ino. Rate, M=8 TH BPPM N/N= N/N= N/N=3 N/N= SNR (db) Submiion Slide 5

16 Location Accuracy MCSK/BPPM Contant Power Contraint Ste Ste Ste Ste 3 Procedure Reult Comment Initial condition or TH-BPPM Increae M Increae N/N Increae T Ste 4 Increae A R (inormation rate); (erormance) TX (ower) R TX R TX > R R TX R ; > = TX > R 4 TX = TX > R > R ; > > TX > R 3 3 > ; 3 ; > R ; ; may or may not be le than 3 may or may not be le than = R3 > R; Increaed rame time with longer obervation eriod, 3 > 4 & > 4; higher inormation rate, > TX 4 > TX better erormance 3 and lower tranmit ower Accurate Ranging/Location Submiion Slide 6

17 Concluion MCSK/BPPM rovide: increaed inormation rate lower tranmit ower better erormance imroved ectral characteritic Simultaneouly! MCSK/BPPM i caable o: inormation rate calability location/ranging accuracy IEEE 8.5.4a PHY Submiion Slide 7

18 Back-u Slide Submiion Slide 8

19 MCSK/BPPM Contant Power Contraint Power Cont. or N/N = (TH code et ) M= M=4 M=8 TH BPPM SNR (db) Power Cont. or N/N = (TH code et ) M= M=4 M=8 TH BPPM Power Cont. or N/N = 4 (TH code et ) M= M=4 M=8 TH BPPM SNR (db) SNR (db) Submiion Slide 9

20 MCSK/BPPM Contant Energy/Bit Contraint Energy Cont. or N/N = (TH code et ) M= M=4 M=8 TH BPPM SNR (db) Energy Cont. or N/N = (TH code et ) M= M=4 M=8 TH BPPM Energy Cont. or N/N = 4 (TH code et ) M= M=4 M=8 TH BPPM SNR (db) SNR (db) Submiion Slide

21 Eect o TH Code Deign on the Perormance MCSK/BPPM Contant Power Contraint N/N=, TH code comarion M=4, rand. M=8, rand. M=4, det. M=8, det. conv. N/N=, TH code comarion M=4, rand. M=4, det. conv SNR (db) SNR (db) Submiion Slide

22 TH Code Sectrum o: a) TH-BPPM, N= b) ideal MCSK/BPPM, N code ectrum 4 3 c) realitic MCSK/BPPM requency (Hz) x 8 Fig. a. TH-BPPM 4 ideal ectrum 4 M=8, N = M=56, N = 3 3 M=8, N =56 code ectrum code ectrum requency (Hz) x 8 Fig. b. ideal MCSK/BPPM requency (Hz) x 8 Fig. c. realitic MCSK/BPPM Submiion Slide