DocumentCode :
3281518
Title :
An Enhanced Deterministic Sequential Monte Carlo Method for Near-Optimal MIMO Demodulation
Author :
Aggarwal, Pradeep ; Prasad, Narayan ; Wang, Xiaodong
Author_Institution :
Dept. of Electr. Eng., Columbia Univ., New York, NY
fYear :
2006
fDate :
22-24 March 2006
Firstpage :
123
Lastpage :
128
Abstract :
We propose a low-complexity, linear MMSE-based sequential Monte Carlo (SMC) technique as an alternative to the sphere decoder for near-optimal demodulation in MIMO systems. Prior to the SMC procedure, the received signal is passed through a linear MMSE-based preprocessing step, which also determines an optimal channel-dependent order of detection and produces a sequential structure. The algorithm then draws the symbol samples in a deterministic fashion, and the survivor paths are selected based on their importance weights. The proposed algorithm exploits the rectangular structure of the QAM signal constellation by separating the real and imaginary parts of the signal to reduce the complexity associated with the listing and weight update steps. We demonstrate through simulations that the new method achieves the sphere decoder performance for V-BLAST systems.
Keywords :
MIMO communication; Monte Carlo methods; demodulation; least mean squares methods; quadrature amplitude modulation; signal detection; signal sampling; MIMO demodulation; QAM signal constellation; V-BLAST system; enhanced deterministic sequential Monte Carlo method; linear MMSE-based preprocessing step; minimum mean square error; multiple input multiple output system; quadrature amplitude modulation; signal detection; Computational complexity; Constellation diagram; Demodulation; Detectors; MIMO; Maximum likelihood decoding; Monte Carlo methods; Receiving antennas; Sliding mode control; Transmitting antennas;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information Sciences and Systems, 2006 40th Annual Conference on
Conference_Location :
Princeton, NJ
Print_ISBN :
1-4244-0349-9
Electronic_ISBN :
1-4244-0350-2
Type :
conf
DOI :
10.1109/CISS.2006.286447
Filename :
4067788
Link To Document :
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