Abstract:

This article constructs a multiple input multiple output orthogonal frequency divesion multiplex (MIMO-OFDM) transmitter model based on Alamouti spacetime coding,and proposes a multi-user likely iterative receiving algorithm based on the transmitter model and the soft-input soft-output(SISO)technique. The iterative algorithm adopts grouped receiving and the reduced SISO multi-user detection algorithm.It can help the receiving algorithm reduce complexity greatly and converge rapidly. The detailed realizing diagram of the algorithm is provided,and simulation tests show that the algorithm performs favorably with rapid convergence and validity.

Key words: space-time coding, MIMO-OFDM, soft-input soft-output, grouped receiving, algorithms