DocumentCode :
1139706
Title :
Multistage Iterative Decoding With Complexity Reduction for Concatenated Space–Time Codes
Author :
Reial, Andres ; Wilson, Stephen G.
Author_Institution :
Ericsson Res., Ericsson AB, Lund, Sweden
Volume :
53
Issue :
8
fYear :
2005
Firstpage :
1300
Lastpage :
1309
Abstract :
Space–time encoders exploiting concatenated coding structures are efficient in attaining the high rates available to large-dimensional multiple-transmitter, multiple-receiver wireless systems under fading conditions, while also providing maximal diversity benefits. We present a multistage iterative decoding structure that takes full advantage of the concatenated nature of the transmission path, treating the modulator and channel stages as an additional encoder in serial concatenation. This iterative decoder architecture allows an encoder employing decoupled coding and modulation to reach the performance of coded modulation systems. It also admits reduced-complexity decoding with a computational load that is nonexponential in the number of antennas or the transmission bit rate, and makes practical decoding for large transmitter arrays possible. The performance curves for these methods follow the shape of the Fano bound, with only a modest power penalty.
Keywords :
antenna arrays; channel coding; computational complexity; concatenated codes; diversity reception; fading channels; iterative decoding; modulation coding; radio networks; receiving antennas; space-time codes; transmitting antennas; Fano bound; antennas; channel stage; coded modulation system; complexity reduction; concatenated space-time codes; decoupled coding; fading conditions; large-dimensional multiple-transmitter; maximal diversity; modulator stage; multiple-receiver wireless system; multistage iterative decoding; reduced-complexity decoding; serial concatenation; transmitter arrays; Antenna arrays; Bit rate; Computer architecture; Concatenated codes; Fading; Iterative decoding; Loaded antennas; Modulation coding; Transmitters; Transmitting antennas; Diversity; iterative decoding; reduced-complexity decoding; space–time coding (STC);
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOMM.2005.852848
Filename :
1495851
Link To Document :
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