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Low Complexity V-BLAST MIMO-OFDM Detector by Successive Iterations ReductionAHMED, K. , ABUELENIN, S. , SOLIMAN, H. , AL-BARBARY, K.
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MIMO, OFDM, signal detection, V-BLAST
detection(14), mimo(12), ofdm(10), complexity(8), communications(8), performance(7), system(6), systems(5), reduced(4)
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About this article
Date of Publication: 2015-02-28
Volume 15, Issue 1, Year 2015, On page(s): 77 - 82
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2015.01011
Web of Science Accession Number: 000352158600011
SCOPUS ID: 84924812233
V-BLAST detection method suffers large computational complexity due to its successive detection of symbols. In this paper, we propose a modified V-BLAST algorithm to decrease the computational complexity by reducing the number of detection iterations required in MIMO communication systems. We begin by showing the existence of a maximum number of iterations, beyond which, no significant improvement is obtained. We establish a criterion for the number of maximum effective iterations. We propose a modified algorithm that uses the measured SNR to dynamically set the number of iterations to achieve an acceptable bit-error rate. Then, we replace the feedback algorithm with an approximate linear function to reduce the complexity. Simulations show that significant reduction in computational complexity is achieved compared to the ordinary V-BLAST, while maintaining a good BER performance.
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Faculty of Electrical Engineering and Computer Science
Stefan cel Mare University of Suceava, Romania
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