Spatio-temporal adaptive array for asynchronous multiuser MIMO-STBC transmission

In this paper, we present a modified spatio- temporal adaptive array for multiuser space-time block codes (Modified STBC-TDLAA) transmission in frequency selective fading channel with the presence of co-channel interferences (CCIs). This method based on the transversal filter adaptive array perform the joint interference suppression and equalization. The presented Modified STBC-TDLAA can maximize the transmission efficiency by incorporating the receive signal component for both non-conjugated and the complex conjugated version of desired signal, which is dispersed in the received signal. Furthermore, Modified STBC-TDLAA overcomes the timing synchronization errors by realigning the asynchronous multiuser signal to undergo the synchronous joint interference suppression and equalization. Simulation results show that both our proposed scheme has a better performance than conventional STBC-TDLAA, in frequency selective fading channel.