A New Multistage Whitener-Based Detector for MIMO Systems

Authors:
Sangho Nam;Sungmook Lim;Kyunbyoung Ko;Daesik Hong
Affiliations:
Information and Telecommunication Laboratory, School of Electrical and Electronic Engineering, Yonsei University, Seoul, Korea 120-749;Information and Telecommunication Laboratory, School of Electrical and Electronic Engineering, Yonsei University, Seoul, Korea 120-749;Department of Control & Instrumentation Engineering, Chungju National University, Chungbuk, Korea 380-702;Information and Telecommunication Laboratory, School of Electrical and Electronic Engineering, Yonsei University, Seoul, Korea 120-749
Venue:
Wireless Personal Communications: An International Journal
Year:
2011

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Abstract

We propose a new multistage whitener-based detector (MWD) to guarantee low complexity and high performance for multiple-input multiple-output systems. The proposed MWD reduces complexity by detecting two out of N T transmitted symbols in each stage of the whitening process. Furthermore, it can enhance performance by adopting a norm-based selection criterion that considers the instantaneous channel state and interference cancellation using C i local solutions at the i-th stage of the whitening process. Accordingly, the proposed MWD can achieve the optimum maximum likelihood detector (MLD) while having a considerably reduced computational complexity compared with the optimal MLD.