Cooperative blind receiving scheme for space-time coding systems

Multiple antenna schemes can improve link reliability and provide high spectral efficiency. Some space-time coding systems are capable of meeting these requirements by using multiple antenna strategies. However, in order to achieve largely improved performance they need precise channel information at the receiver, which is difficult to be guaranteed in some specific scenarios. In this paper, blind source separation (BSS) technique is exploited to detect the transmitted signals blindly, which needs not the channel estimation. By analyzing the essential structures of space-time systems, the specific model suitable to BSS is established. Meanwhile, the strategy can be used to the base station cooperation to achieve cooperative blind receiving scheme. The robustness against channel estimation error and flexibility of system design can be acquired by using the BSS based scheme. Simulation results demonstrate the validity of proposed approach and the issue about convergence of BSS based scheme is also discussed.