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A low-complexity sequential Monte Carlo algorithm for blind detection in MIMO systems

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3 Author(s)
Yong-Tao Su ; Dept. of Autom., Tsinghua Univ., Beijing ; Xian-Da Zhang ; Xiao-Long Zhu

In statistical signal processing, the sequential Monte Carlo (SMC) method is powerful and can approach the theoretical optima. However, its computational complexity is usually very high, especially in multiple-input multiple-output (MIMO) systems. This paper presents a new low-complexity SMC (LC-SMC) algorithm for blind detection in MIMO systems, the main idea of which is to shrink the sampling space via channel estimation which is initialized using the first differentially modulated symbol and then updated using the Monte Carlo samples. Since the a posteriori probability of the transmitted symbols can be calculated separately by each transmit antenna, the proposed LC-SMC algorithm is not only computationally efficient, as compared to the original SMC whose complexity grows exponentially with the number of transmit antennas, but also makes blind turbo receiver more feasible for multilevel/phase modulations. Simulation results are presented to demonstrate the effectiveness of the LC-SMC algorithm

Published in:

Signal Processing, IEEE Transactions on  (Volume:54 ,  Issue: 7 )

Date of Publication:

July 2006

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