DocumentCode :
1334357
Title :
Approaching near-capacity on a multi-antenna channel using successive decoding and interference cancellation receivers
Author :
Sellathurai, Mathini ; Guinand, Paul ; Lodge, John
Author_Institution :
Communications Research Centre, Canada Ottawa, Ontario K2H 8S2
Volume :
5
Issue :
2
fYear :
2003
fDate :
6/1/2003 12:00:00 AM
Firstpage :
116
Lastpage :
123
Abstract :
In this paper, we address the problem of designing multirate codes for a multiple-input and multiple-output (MIMO) system by restricting the receiver to be a successive decoding and interference cancellation type, when each of the antennas is encoded independently. Furthermore, it is assumed that the receiver knows the instantaneous fading channel states but the transmitter does not have access to them. It is well known that, in theory, minimum-mean-square error (MMSE) based successive decoding of multiple access (in multi-user communications) and MIMO channels achieves the total channel capacity. However, for this scheme to perform optimally, the optimal rates of each antenna (per-antenna rates) must be known at the transmitter. We show that the optimal per-antenna rates at the transmitter can be estimated using only the statistical characteristics of the MIMO channel in time-varying Rayleigh MIMO channel environments. Based on the results, multirate codes are designed using punctured turbo codes for a horizontal coded MIMO system. Simulation results show performances within about one to two dBs of MIMO channel capacity.
Keywords :
Decoding; MIMO; Receiving antennas; Signal to noise ratio; Transmitters; Multiple-input multiple-output (MIMO); interference cancellation; minimum-mean-square error (MMSE); multirate coding; per-antenna rates; successive decoding; turbo codes;
fLanguage :
English
Journal_Title :
Communications and Networks, Journal of
Publisher :
ieee
ISSN :
1229-2370
Type :
jour
DOI :
10.1109/JCN.2003.6596557
Filename :
6596557
Link To Document :
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