OFDM和多址技术的结合能够允许多个用户同时共享有限的无线频谱，从而获得较高的系统容量。-OFDM and multiple access technologies combined to allow multiple users to simultaneously share the limited wireless spectrum, and thus obtain a higher system capacity.

This paper deals with the capacity behavior of wireless Orthogonal Frequency Division Multiplexing (OFDM)-based spatial multiplexing system when considering realistic channel delay profiles. In both the SISO and the MIMO contexts, we compare the

The objective of this study is improving channel estimation accuracy in OFDM system because channel state information is required for signal detection at receiver and its accuracy affects the overall performance of system and it is essential to impro