Reduced-complexity soft-decision aided PSK detection
Reduced-complexity soft-decision aided PSK detection
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.
Xu, Chao
349b7322-fd17-4fcd-a49f-c62afe284d50
Liang, Dandan
7ec17ba1-8959-4ee0-8f58-2e51c646ae23
Sugiura, Shinya
acb6e7ea-eb0c-4b33-82c6-da8640be4233
Ng, S.X.
e19a63b0-0f12-4591-ab5f-554820d5f78c
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
3 September 2012
Xu, Chao
349b7322-fd17-4fcd-a49f-c62afe284d50
Liang, Dandan
7ec17ba1-8959-4ee0-8f58-2e51c646ae23
Sugiura, Shinya
acb6e7ea-eb0c-4b33-82c6-da8640be4233
Ng, S.X.
e19a63b0-0f12-4591-ab5f-554820d5f78c
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Xu, Chao, Liang, Dandan, Sugiura, Shinya, Ng, S.X. and Hanzo, Lajos
(2012)
Reduced-complexity soft-decision aided PSK detection.
IEEE Vehicular Technology Conference (VTC) Fall 2012, Quebec, Canada.
03 - 09 Sep 2012.
Record type:
Conference or Workshop Item
(Paper)
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.
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RC_Soft_PSK_QAM_Conf1_v2.pdf
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Published date: 3 September 2012
Venue - Dates:
IEEE Vehicular Technology Conference (VTC) Fall 2012, Quebec, Canada, 2012-09-03 - 2012-09-09
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 340956
URI: http://eprints.soton.ac.uk/id/eprint/340956
PURE UUID: 3e92cb16-00d9-4789-8890-ccf4607d7dd1
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Date deposited: 11 Jul 2012 13:34
Last modified: 18 Mar 2024 02:48
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Contributors
Author:
Chao Xu
Author:
Dandan Liang
Author:
Shinya Sugiura
Author:
S.X. Ng
Author:
Lajos Hanzo
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