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