This paper establishes a Matlab simulation model of the MIMO-OFDM system, and on this basis studies the STBC (SpaceTime Block Code) space-time coding and the channel estimation algorithm based on block pilots. The LS (LeastSquare) channel estimation algorithm based on block pilots is improved with low complexity, and the improved algorithm is called the LLS (Low complexity LS) algorithm. Computer simulation shows that when transmitting a large amount of information, the computational complexity and computational time of the algorithm are greatly reduced compared to other channel estimation algorithms, and the bit error rate performance of channel estimation is improved.
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