標題: | Robust Linear Receiver for High-Rate MIMO OFDM under Channel Parameter Mismatch |
作者: | Lin, Chih-Yuan Wu, Jwo-Yuh Lee, Ta-Sung 電信工程研究所 Institute of Communications Engineering |
公開日期: | 2006 |
摘要: | We consider MIMO-OFDM transmission, in a scenario that the adopted cyclic-prefix (CP) length is shorter than the channel delay spread for boosting data rate and, moreover, the channel parameters are not exactly known but are estimated using the least-squares (LS) training technique. By exploiting the receiver spatial resource, we propose a constrained-optimization based linear equalizer which can mitigate intersymbol interference and inter-carrier interference incurred by insufficient CP interval, and is robust against the net detrimental effects caused by channel estimation errors. The optimization problem is formulated in an equivalent unconstrained generalized-sidelobe-canceller (GSC) setup. The channel parameter error is explicitly incorporated into the constraint-free GSC system model through the perturbation technique; this allows us to exploit the presumed LS channel error property for deriving a closed-form solution. Simulation results confirm the effectiveness of the proposed method. |
URI: | http://hdl.handle.net/11536/17106 |
ISBN: | 978-1-4244-0356-1 |
ISSN: | 1930-529X |
期刊: | GLOBECOM 2006 - 2006 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE |
顯示於類別: | 會議論文 |