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Near-capacity joint channel estimation and three-stage turbo detection for MIMO systems

Near-capacity joint channel estimation and three-stage turbo detection for MIMO systems
Near-capacity joint channel estimation and three-stage turbo detection for MIMO systems
We propose a novel joint channel estimation and three-stage iterative detection/decoding scheme for near-capacity MIMO systems. In our scheme, as usual, the detected soft information is first exchanged a number of times within the inner turbo loop between the unity-rate-code (URC) decoder and the MIMO soft-demapper, and the information gleaned from the inner URC decoder is then iteratively exchanged with the outer decoder in the outer turbo loop. Our channel estimator however exploits the a posteriori information produced by the MIMO soft-demapper to select a sufficient blocks of high-quality detected soft bits, and it is naturally embedded into the original iterative three-stage detection/decoding process, without introducing the costly iterative loop between the decision-directed channel estimator and the three-stage turbo detector/decoder. Hence, the computational complexity of our joint channel estimation and three-stage turbo detection is similar to that of the three-stage turbo detection/decoding scheme associated with the perfect CSI. Moreover, our reduced-complexity semi-blind scheme is capable of achieving the optimal maximum-likelihood turbo detection performance attained under the perfect CSI, with the same number of turbo iterations.
Zhang, Peichang
e87b4adb-ec8a-47e9-a73e-5b9140f5dc9d
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Zhang, Peichang
e87b4adb-ec8a-47e9-a73e-5b9140f5dc9d
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Zhang, Peichang, Chen, Sheng and Hanzo, Lajos (2013) Near-capacity joint channel estimation and three-stage turbo detection for MIMO systems. 2013 IEEE Wireless Communications and Networking Conference (WCNC 2013), Shanghai, China. 07 - 10 Apr 2013. 6 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

We propose a novel joint channel estimation and three-stage iterative detection/decoding scheme for near-capacity MIMO systems. In our scheme, as usual, the detected soft information is first exchanged a number of times within the inner turbo loop between the unity-rate-code (URC) decoder and the MIMO soft-demapper, and the information gleaned from the inner URC decoder is then iteratively exchanged with the outer decoder in the outer turbo loop. Our channel estimator however exploits the a posteriori information produced by the MIMO soft-demapper to select a sufficient blocks of high-quality detected soft bits, and it is naturally embedded into the original iterative three-stage detection/decoding process, without introducing the costly iterative loop between the decision-directed channel estimator and the three-stage turbo detector/decoder. Hence, the computational complexity of our joint channel estimation and three-stage turbo detection is similar to that of the three-stage turbo detection/decoding scheme associated with the perfect CSI. Moreover, our reduced-complexity semi-blind scheme is capable of achieving the optimal maximum-likelihood turbo detection performance attained under the perfect CSI, with the same number of turbo iterations.

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More information

e-pub ahead of print date: April 2013
Venue - Dates: 2013 IEEE Wireless Communications and Networking Conference (WCNC 2013), Shanghai, China, 2013-04-07 - 2013-04-10
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 348601
URI: http://eprints.soton.ac.uk/id/eprint/348601
PURE UUID: f14c7845-9464-47da-a139-44971059b76f
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 14 Feb 2013 14:14
Last modified: 20 Jul 2019 01:26

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