Joint data detection for punctured ARQ diversity systems
Roberson, J.; Dong, X.; Ding, Z.
Acoustics, Speech, and Signal Processing, 2005. Proceedings. (ICASSP apos;05). IEEE International Conference on
Volume 3, Issue , 18-23 March 2005 Page(s): iii/1145 - iii/1148 Vol. 3
Digital Object Identifier   10.1109/ICASSP.2005.1415917
Summary: We investigate a bandwidth efficient ARQ scheme in which the medium access control (MAC) only requests a partial retransmission after packet reception error. To reduce channel usage, the original packet is punctured prior to retransmission(s), thereby forming a modified ARQ scheme which we name punctured automatic repeat request (PARQ). The puncturing in the system can be viewed as a form of "diversity" to blindly estimate the channel. We focus on the detection of the original data sequence by presenting a maximum likelihood (ML) algorithm and a simpler multirate linear equalizer. We also investigate the BER performance based on estimated channel responses from both the blind and the semiblind channel estimation algorithms.

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