Orthogonal Detection of Beam Space Time Block Coding using ICA

Theoretical investigations have proven that the system combining beamforming with space-time block coding can improve the performance efficiently. The conventional decoding schemes, which need accurate channel state information (CSI), are usually based on channel estimation. When the CSI is hard to achieve in some cases, the system performance would be affected heavily. Independent component analysis (ICA), one classical blind signal separation technique, can be used to detect the transmitted signals without channel estimation. Aiming at signals structure at the receiver, this paper proposed an orthogonal detecting scheme based on ICA. Simulations were carried out to compare the performance of the new scheme with conventional schemes. Simulation results for Rayleigh fading channels demonstrated that the new scheme could enhance the flexibility of the communication system and achieve better bit error rate (BER) performance