Title :
Turbo-coded ARQ schemes for DS-CDMA data networks over fading and shadowing channels
Author :
Ji, Tingfang ; Stark, Wayne E.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
fDate :
6/21/1905 12:00:00 AM
Abstract :
Modified ARQ (automatic-repeat-request) techniques based on turbo coding are investigated for asynchronous DS-CDMA (direct-sequence code-division multiple-access) data networks under shadowing and frequency selective fading channel conditions. The throughput, delay, and energy efficiency performance of standard ARQ, metric combining, and RCPT (rate compatible punctured turbo) coded ARQ schemes are compared via simulations. The RCPT/ARQ schemes are shown to outperform the other two schemes in terms of both throughput and energy efficiency at the cost of larger delay and complexity. Maximum network throughput is investigated for different ARQ schemes under energy constraints
Keywords :
automatic repeat request; code division multiple access; data communication; delays; fading channels; land mobile radio; multiuser channels; packet radio networks; spread spectrum communication; turbo codes; RCPT coded ARQ; asynchronous DS-CDMA data networks; automatic-repeat-request; complexity; delay; direct-sequence code-division multiple-access; energy constraints; energy efficiency; energy efficiency performance; frequency selective fading channel; information packet; maximum network throughput; metric combining; mobile transmitters; rate compatible punctured turbo coded ARQ; shadowing channels; simulations; standard ARQ protocol; turbo coding; turbo-coded ARQ; Automatic repeat request; Code standards; Delay; Energy efficiency; Fading; Frequency; Multiaccess communication; Shadow mapping; Throughput; Turbo codes;
Conference_Titel :
Military Communications Conference Proceedings, 1999. MILCOM 1999. IEEE
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-5538-5
DOI :
10.1109/MILCOM.1999.822646
