Integrated iterative equalization for ARQ systems
Samra, H.; Zhi Ding
Acoustics, Speech, and Signal Processing, 2002. Proceedings. (ICASSP apos;02). IEEE International Conference on
Volume 3, Issue , 2002 Page(s): III-2781 - III-2784 vol.3
Digital Object Identifier   10.1109/ICASSP.2002.1005263
Summary: A new approach is presented to enhance receiver performance for ARQ communication systems that use systematic codes in rapidly-changing environments. This new approach involves a simple modification to the traditional turbo-equalizer by integrating multiple ARQ transmissions for joint equalization of systematic codewords. This modification provides a computationally efficient joint receiver that improves frame error rates and throughput when compared with a few other simple approaches. To analyze the receiver, simulation results are presented for two types of systematic codes: recursive systematic codes (RSC) and low-density parity check (LDPC) codes. Results are also presented for a hybrid ARQ system where subsequent transmissions contain only portions of the original transmission.

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