Reduced-complexity soft-decision aided PSK detection


Xu, Chao, Liang, Dandan, Sugiura, Shinya, Ng, S.X. and Hanzo, Lajos (2012) Reduced-complexity soft-decision aided PSK detection At IEEE Vehicular Technology Conference (VTC) Fall 2012, Canada. 03 - 09 Sep 2012.

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Description/Abstract

In this paper, we propose to reduce the complexity of both the Approx-Log-MAP algorithm as well as of the Max-Log-MAP algorithm, which were designed for soft-decision aided PSK detectors. First of all, we extend the shown a posteriori PSK symbol probability formula and streamline it by eliminating its unnecessary calculations in the context of the Approx-Log-MAP algorithm. Secondly, we reduce the complexity of the Max-Log-MAP algorithm, where the maximum a posteriori symbol probability may be obtained without evaluating and comparing all the candidate symbol probabilities. Furthermore, we apply our new soft detection arrangement to a variety of coded systems. Our simulation results demonstrate that a significant detection complexity reduction was achieved by our design without any performance loss. For example, a factor two complexity reduction was achieved by the proposed Max-Log-MAP algorithm, when it was invoked for detecting QPSK symbols, which is expected to be significantly higher, when invoked for 16QAM

Item Type: Conference or Workshop Item (Paper)
Venue - Dates: IEEE Vehicular Technology Conference (VTC) Fall 2012, Canada, 2012-09-03 - 2012-09-09
Subjects:
Organisations: Southampton Wireless Group
ePrint ID: 340956
Date :
Date Event
3 September 2012Published
Date Deposited: 11 Jul 2012 13:34
Last Modified: 17 Apr 2017 16:51
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/340956

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