DocumentCode :
1500637
Title :
Performance of channel coded noncoherent systems: modulation choice, information rate, and Markov chain Monte Carlo detection
Author :
Chen, Rong-Rong ; Peng, Ronghui
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Utah, Salt Lake City, UT, USA
Volume :
57
Issue :
10
fYear :
2009
fDate :
10/1/2009 12:00:00 AM
Firstpage :
2841
Lastpage :
2845
Abstract :
This paper investigates performance of channel coded noncoherent systems over block fading channels. We consider an iterative system where an outer channel code is serially concatenated with an inner modulation code amenable to noncoherent detection. We emphasize that, in order to obtain near-capacity performance, the information rates of modulation codes should be close to the channel capacity. For certain modulation codes, a single-input single-output (SISO) system with only one transmit antenna may outperform a dual-input and single-output (DISO) system with two transmit antennas. This is due to the intrinsic information rate loss of these modulation codes compared to the DISO channel capacity. We also propose a novel noncoherent detector based on Markov Chain Monte Carlo (MCMC). Compared to existing detectors, the MCMC detector achieves comparable or superior performance at reduced complexity. The MCMC detector does not require explicit amplitude or phase estimation of the channel fading coefficient, which makes it an attractive candidate for high rate communication employing quadrature amplitude modulation (QAM) and for multiple antenna channels. At transmission rates of 1 ~ 1.667 bits/sec/Hz, the proposed SISO systems employing 16QAM and MCMC detection perform within 1.6-2.3 dB of the noncoherent channel capacity achieved by optimal input.
Keywords :
Markov processes; Monte Carlo methods; channel capacity; channel coding; concatenated codes; fading channels; modulation coding; quadrature amplitude modulation; signal detection; transmitting antennas; DIS) system; Markov chain Monte Carlo detection; QAM; SISO system; amplitude estimation; block fading channels; channel capacity; channel coded noncoherent systems; complexity reduction; dual-input single-output system; information rate; iterative system; modulation choice; modulation code; multiple antenna channels; noncoherent detection; phase estimation; quadrature amplitude modulation; serially concatenated code; single-input single-output system; transmit antenna; Channel capacity; Concatenated codes; Detectors; Fading; Information rates; Modulation coding; Monte Carlo methods; Phase detection; Quadrature amplitude modulation; Transmitting antennas; Noncoherent detection; Noncoherent detection Carlo; channel capacity; fading channel; iterative decoding; multiple antenna; transmit diversity;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOMM.2009.10.080002
Filename :
5288476
Link To Document :
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