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Generalized Parallel Interference Cancellation With Near-Optimal Detection Performance

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4 Author(s)
Zhendong Luo ; Bell Labs Res. China, Beijing ; Ming Zhao ; Siyang Liu ; Yuanan Liu

The maximum-likelihood detection (MLD) algorithm is the optimal detection scheme for vertical Bell Laboratories layered space-time (V-BLAST) systems. However, it is generally infeasible to implement the MLD algorithm in practical systems because of its high computational complexity. In this paper, we used two parallel interference cancellation techniques, including precancellation and postcancellation, to simplify the MLD algorithm into a class of computationally efficient suboptimal detection algorithms, herein called the generalized parallel interference cancellation (GPIC) algorithm. Numerical analysis shows that the GPIC algorithm can approximately achieve the MLD performance with considerably low and stable computational complexity. Furthermore, it can be significantly accelerated via parallel processing methods. With near-optimal performance, low and stable complexity, and high running speed, the GPIC algorithm is very suitable for real-time communication systems.

Published in:

Signal Processing, IEEE Transactions on  (Volume:56 ,  Issue: 1 )

Date of Publication:

Jan. 2008

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