Equalization of MIMO-OFDM Channels Using Bussgang Algorithm

In this paper, Bussgang algorithm is developed as a blind equalizer for multi-carrier multi-input multi-output (MIMO) channels to combat both spatial multiplexing interference and channel variations. Also, the Bussgang technique is extended with adapting the one or two parameters in its nonlinear function. The Bussgang algorithm and its two extended version are simulated and compared to the full known channel (ideal) and decision directed cases. Frame error rate (FER) and bit error rate (BER) of both coded and uncoded cases, are considered as comparison criteria and it is shown that the much performance improvement is achieved compared to decision directed algorithm and each of the three proposed schemes presents the best performance in the different criteria and Eb/NO.