148 The Research of Channel Estimation Algorithm for MIMO-OFDM Systems Available to Purchase

The channel estimation technique based on comb-type pilot arrangement, which is used in multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) system, is investigated in this paper. In view of the contradiction of time-domain LS algorithm etween performance and computational complexity, a frequency-domain LS algorithm was presented. The simulation results show that frequency-domain LS algorithm has preferable performance and lower complexity. In addition, we compared the BER performance of the constant interpolation, linear interpolation, second order interpolation and time domain interpolation algorithms based on comb-type pilot in MIMOOFDM systems. The simulation results show that the time domain interpolation performs the best among all channel interpolation algorithms.