Implementation of QR decomposition for MIMO-OFDM detection systems

An improved implementation of QR decomposition for MIMO-OFDM detection based on the Givens rotation method is presented in this paper. The hardware of QR decomposition is constructed by coordinate rotation digital computer (CORDIC) operating with fewer gate counts and lower power consumption than triangular systolic array structures. In wireless communication systems, the accuracy for transmitting signals is essential. Thus, a better data detection algorithm and precise channel estimation method plays an important role here. The channel estimation implemented with QR decomposition is to reduce hardware complexity of MIMO-OFDM detection. The results of implementation reveal that the proposed QR decomposition architecture has shorter clock latency than folding structure and smaller hardware area than Gram-Schmidt.