Low Complexity V-BLAST MIMO-OFDM Detector by Successive Iterations Reduction
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 begi...
| Published in: | Advances in Electrical and Computer Engineering |
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| Main Authors: | , , , |
| Format: | Article |
| Language: | English |
| Published: |
Stefan cel Mare University of Suceava
2015-02-01
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.4316/AECE.2015.01011 |
| Summary: | 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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| ISSN: | 1582-7445 1844-7600 |