New uplink transmission method with non-codebook based precoding

An uplink transmission non-codebook based precoding method is proposed which can be used in local area network or wide area network wireless communication systems. The new method is based on the geometric mean decomposition (GMD) decomposition precoding and the mixed parallel interference cancellation/serial interference cancellation (PIC/SIC) detection based on orthogonal-triangular (QR) decomposition algorithms. Two main disadvantages of complex algorithm of uplink transmission with codebook based precoding and the wide bandwidth occupying of the codebook numbers for feedback are overcomed. Simulation shows that the performance of the mixed PIC/SIC based on QR decomposition detection algorithm applied in our transmission method can be improved, and the complexity of mixed PIC/SIC algorithm is lower than that of codebook based precoding methods. The proposed transmission method is appropriate for detecting received signals in wireless local area network uplink devices.