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Low-complexity iterative frequency domain decision feedback equalization

Low-complexity iterative frequency domain decision feedback equalization
Low-complexity iterative frequency domain decision feedback equalization
Single-carrier transmission with frequency domain equalization (SC-FDE) offers a viable design alternative to the classic orthogonal frequency division multiplexing technique. However, SC-FDE using a linear equalizer may suffer from serious performance deterioration for transmission over severely frequency-selective fading channels. An effective method of solving this problem is to introduce non-linear decision feedback equalization (DFE) to SC-FDE. In this contribution, a low complexity iterative decision feedback equalizer operating in the frequency domain of single-carrier systems is proposed. Based on the minimum mean square error criterion, a simplified parameter estimation method is introduced to calculate the coefficients of the feed-forward and feedback filters, which significantly reduces the implementation complexity of the equalizer. Simulation results show that the performance of the proposed simplified design is similar to the traditional iterative block DFE under various multipath fading channels but it imposes a much lower complexity than the latter.
0018-9545
1295-1301
Zhang, Chao
275a6acd-9b7c-4c10-b894-2085af9ecd7c
Wang, Zhaocheng
a6bc4037-d26d-4ddd-9ce5-f018980115b6
Pan, Changyong
aa1be232-a735-464f-9902-86c201b3b038
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Zhang, Chao
275a6acd-9b7c-4c10-b894-2085af9ecd7c
Wang, Zhaocheng
a6bc4037-d26d-4ddd-9ce5-f018980115b6
Pan, Changyong
aa1be232-a735-464f-9902-86c201b3b038
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Zhang, Chao, Wang, Zhaocheng, Pan, Changyong, Chen, Sheng and Hanzo, Lajos (2011) Low-complexity iterative frequency domain decision feedback equalization IEEE Transactions on Vehicular Technology, 60, (3), pp. 1295-1301.

Record type: Article

Abstract

Single-carrier transmission with frequency domain equalization (SC-FDE) offers a viable design alternative to the classic orthogonal frequency division multiplexing technique. However, SC-FDE using a linear equalizer may suffer from serious performance deterioration for transmission over severely frequency-selective fading channels. An effective method of solving this problem is to introduce non-linear decision feedback equalization (DFE) to SC-FDE. In this contribution, a low complexity iterative decision feedback equalizer operating in the frequency domain of single-carrier systems is proposed. Based on the minimum mean square error criterion, a simplified parameter estimation method is introduced to calculate the coefficients of the feed-forward and feedback filters, which significantly reduces the implementation complexity of the equalizer. Simulation results show that the performance of the proposed simplified design is similar to the traditional iterative block DFE under various multipath fading channels but it imposes a much lower complexity than the latter.

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Published date: 27 March 2011
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 272072
URI: https://eprints.soton.ac.uk/id/eprint/272072
ISSN: 0018-9545
PURE UUID: b5a20cd0-a13f-4cfc-8972-e099aaae038f
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 01 Mar 2011 21:33
Last modified: 18 Jul 2017 06:34

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Contributors

Author: Chao Zhang
Author: Zhaocheng Wang
Author: Changyong Pan
Author: Sheng Chen
Author: Lajos Hanzo ORCID iD

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