Correlation rotation precoding algorithm based on criterion of minimum mean square error
Yucheng Wu · Journal of Computer Applications · 2012
Concerning the problem that traditional Correlation Rotation(CR) precoding algorithm enlarges noise,Lagrange function was explored to minimize the error between received signal and transmitted signal,statistics and Bayesian theory were explored to calculate the imperfect channel state information,and a scheme of CR precoding algorithm was designed based on Minimum Mean Square Error(MMSE) criterion under perfect Channel State Information(CSI) and imperfect CSI.The simulation results show that under perfect CSI the bit error ratio performance of the designed scheme is improved about 2-3 dB at the same Signal-to-Noise Ratio(SNR),and under imperfect CSI,the system performance is improved obviously compared to CR precoding based on Zero Forcing(ZF) criterion.