TY - GEN

T1 - Finite diversity multiplexing tradeoff over spatially correlated channels

AU - Rezki, Z.

AU - Cotruta, B.

AU - Haccoun, David

AU - Gagnon, François

PY - 2006

Y1 - 2006

N2 - We present a tight lower bound on the outage probability of a spatially correlated multielement antenna (MEA) channel. Using this lower bound, an accurate flnite-SNR estimate of the diversity-multiplexing tradeoff over a spatially correlated Rayleigh fading channel is derived. This estimate allows gaining insight on the impact of spatial correlation on the diversity- multiplexing tradeoff at finite SNR. As expected, the diversity multiplexing tradeoff is severely degraded as the spatial correlation increases. For example, a MIMO system operating at a transmission rate of R = rlog 2(1 + g · η) bps/Hz, where r is the multiplexing gain, g is the array gain and η is the SNR at each receive antenna, and an SNR of 5 dB in a moderately correlated channel, achieves a better diversity gain than a system operating at an SNR of 10 dB in a highly correlated channel, when r ≥ 0.8. Another interesting point is that the maximum diversity gain is unaffected by the correlation, provided that the spatial channel correlation matrix is of full rank.

AB - We present a tight lower bound on the outage probability of a spatially correlated multielement antenna (MEA) channel. Using this lower bound, an accurate flnite-SNR estimate of the diversity-multiplexing tradeoff over a spatially correlated Rayleigh fading channel is derived. This estimate allows gaining insight on the impact of spatial correlation on the diversity- multiplexing tradeoff at finite SNR. As expected, the diversity multiplexing tradeoff is severely degraded as the spatial correlation increases. For example, a MIMO system operating at a transmission rate of R = rlog 2(1 + g · η) bps/Hz, where r is the multiplexing gain, g is the array gain and η is the SNR at each receive antenna, and an SNR of 5 dB in a moderately correlated channel, achieves a better diversity gain than a system operating at an SNR of 10 dB in a highly correlated channel, when r ≥ 0.8. Another interesting point is that the maximum diversity gain is unaffected by the correlation, provided that the spatial channel correlation matrix is of full rank.

UR - http://www.scopus.com/inward/record.url?scp=34548828879&partnerID=8YFLogxK

U2 - 10.1109/VTCF.2006.111

DO - 10.1109/VTCF.2006.111

M3 - Conference contribution

AN - SCOPUS:34548828879

SN - 1424400635

SN - 9781424400638

T3 - IEEE Vehicular Technology Conference

SP - 494

EP - 498

BT - 2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall

T2 - 2006 IEEE 64th Vehicular Technology Conference, VTC-2006 Fall

Y2 - 25 September 2006 through 28 September 2006

ER -