Multi-User MIMO Wireless CDMA System Employing Turbo Coding and Joint Detection through a Multipath Rayleigh Fading Channel

Inhalt:
A generalized Multiple-Input Multiple-Output (MIMO) antenna system that can be fitted to the uplink of a wireless communication system is considered for the general case of multi-user. At the transmitter, the information bits are Turbo coded, then interleaved and passed through a serial-to-parallel converter. The channel is assumed bad urban suffering from multipath Rayleigh fading resulting in inter-symbol and multiple access interference's. At the receiver side, a number of receiving antennas are used followed by a joint multi-user estimator based on the Minimum Mean Square Error Block Linear Equalizer (MMSE-BLE). Computer simulations demonstrate a significant performance improvement in both single user and multi-user cases. Different bit rates are obtained by changing the number of transmitting antennas as well as the channel code rate.