Title :
Accurate noise variance estimation scheme for ordered successive detection in MIMO systems
Author :
Benjebbour, Anass ; Yoshida, Susumu
Author_Institution :
Graduate Sch. of Informatics, Kyoto Univ., Japan
Abstract :
Ordered successive MMSE detection (OSD) can achieve a good tradeoff between performance and complexity for multiple-input multiple-output (MIMO) wireless systems where different data streams are transmitted and received simultaneously over several equal number of transmit and receive antennas. However, over time-varying MIMO channels, the performance of OSD is degraded with realistic channel estimation. The accuracy of the generated ing weights is improved by using a modified noise variance that takes into consideration the weights update lag error besides to the noise and channel estimation errors is proposed in this paper. Simulation results by using the proposed modified noise variance estimation scheme show significant performance improvements for OSD.
Keywords :
MIMO systems; Rayleigh channels; antenna arrays; channel estimation; least mean squares methods; maximum likelihood detection; radio receivers; time-varying channels; MIMO; MMSE; OSD; accurate noise variance estimation scheme; channel estimation; minimum mean squared error; multiple-input multiple-output wireless system; ordered successive detection; receive antenna; time-varying channel; transmit antenna; Channel estimation; Degradation; Detectors; Error correction; Frequency; MIMO; Maximum likelihood detection; Noise generators; Receiving antennas; Transmitting antennas;
Conference_Titel :
Information, Communications and Signal Processing, 2003 and Fourth Pacific Rim Conference on Multimedia. Proceedings of the 2003 Joint Conference of the Fourth International Conference on
Print_ISBN :
0-7803-8185-8
DOI :
10.1109/ICICS.2003.1292614
