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Title: Soft QRD-M decoding for coded IFDMA systems
Authors: Png, K.-B.
Peng, X.
Chin, F.
Ko, C.C. 
Issue Date: 2009
Citation: Png, K.-B., Peng, X., Chin, F., Ko, C.C. (2009). Soft QRD-M decoding for coded IFDMA systems. IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC : -. ScholarBank@NUS Repository.
Abstract: In this paper, a low complexity a posterior probability (APP) detector based on breadth-first tree search algorithm is purposed for coded interleaved frequency division multiple access (IFDMA) system. The proposed detector combines the principles of the M-algorithm with QR decomposition (QRD-M) to generate soft decision statistics in place of the full APP detector which has a high computational cost. We first demonstrate that an IFDMA system can be viewed as a MIMO system at the receiver and then derive the proposed detector. Simulated results show that the bit error rate (BER) performance of a system using the proposed QRD-M detector performs better than a system using frequency domain equalizer, especially for channels with greater diversity. Moreover, the simulated BER performance exhibits similar diversity order as the maximum channel diversity order. ©2009 IEEE.
Source Title: IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
ISBN: 9781424451234
DOI: 10.1109/PIMRC.2009.5449779
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