Amendment to "Performance Analysis of the V-BLAST Algorithm: An Analytical Approach." [1]
| dc.creator | Loyka, Sergey | |
| dc.creator | Gagnon, Francois | |
| dc.date | 2008-11-15 | |
| dc.date.accessioned | 2026-07-07T10:18:42Z | |
| dc.date.available | 2026-07-07T10:18:42Z | |
| dc.description | An analytical technique for the outage and BER analysis of the nx2 V-BLAST algorithm with the optimal ordering has been presented in [1], including closed-form exact expressions for average BER and outage probabilities, and simple high-SNR approximations. The analysis in [1] is based on the following essential approximations: 1. The SNR was defined in terms of total after-projection signal and noise powers, and the BER was analyzed based on their ratio. This corresponds to a non-coherent (power-wise) equal-gain combining of both the signal and the noise, and it is not optimum since it does not provide the maximum output SNR. 2. The definition of the total after-projection noise power at each step ignored the fact that the after-projection noise vector had correlated components. 3. The after-combining noises at different steps (and hence the errors) were implicitly assumed to be independent of each other. Under non-coherent equal-gain combining, that is not the case. It turns out that the results in [1] hold also true without these approximations, subject to minor modifications only. The purpose of this note is to show this and also to extend the average BER results in [1] to the case of BPSK-modulated V-BLAST with more than two Rx antennas (eq. 18-20). Additionally, we emphasize that the block error rate is dominated by the first step BER at the high-SNR mode (eq. 14 and 21). | |
| dc.description | rejected by IEEE Trans. Wireless Communications, but useful anyway (some implicit assumptions of the original paper are removed and the results are extended) | |
| dc.identifier | https://arxiv.org/abs/0811.2525 | |
| dc.identifier | http://arxiv.org/abs/0811.2525 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/174278 | |
| dc.subject | Information Theory | |
| dc.title | Amendment to "Performance Analysis of the V-BLAST Algorithm: An Analytical Approach." [1] | |
| dc.type | text |