Hybrid ARQ protocols using space-time codes

Author

Nguyen, Anh ; Ingram, Mary

Author_Institution

Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA

Volume

4

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

2364

Abstract

Automatic repeat-request (ARQ) protocols using transmit diversity are investigated. The performance of space-time codes (STC) in a pure ARQ protocol (ST-ARQ) is first examined. Two hybrid ARQ schemes using STC are then proposed: space-time hybrid ARQ (ST-HARQ) and turbo space-time hybrid ARQ (TST-HARQ). For the ST-HARQ scheme, the previous transmitted packets are combined with the current received packet. In this scheme, the diversity gain is increased with every retransmission resulting in a higher probability of an accepted packet. For TST-HARQ, the transmitted packets are code combined and iteratively decoded. Performance analysis of ST-ARQ and ST-HARQ are approximated and shown to agree well with simulated results. TST-HARQ is shown to have the highest throughput efficiency compared to ST-HARQ and ST-ARQ in quasi-static and fast flat Rayleigh fading channels

Keywords

Rayleigh channels; access protocols; automatic repeat request; diversity reception; iterative decoding; packet radio networks; turbo codes; ST-ARQ; ST-HARQ; TST-HARQ; automatic repeat-request protocols; code combining; fast flat Rayleigh fading channels; hybrid ARQ protocols; multipath fading; packet transmission; quasi-static channels; simulated results; space-time codes; space-time hybrid ARQ; throughput efficiency; transmit diversity; turbo space-time hybrid ARQ; Analytical models; Automatic repeat request; Decoding; Diversity reception; Fading; Performance analysis; Protocols; Space time codes; Throughput; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th

Conference_Location

Atlantic City, NJ

ISSN

1090-3038

Print_ISBN

0-7803-7005-8

Type

conf

DOI

10.1109/VTC.2001.957172

Filename

957172