Abstract
As peoples demand for communications devices continue increasing, transmission technology of communications devices is developed and created constantly. 3GPP-LTE and Mobile WiMAX are two main competitors in the 4G mobile communication market. In this thesis, we propose the design of a 4x4 MIMO-OFDM downlink receiver for 3GPPLTE. The receiver consists of symbol decision, CFO estimation, SCO estimation, compensation, channel estimation, MIMO detection and codebook selection. Since MIMO detection and codebook selection have 4×4 matrix operations which is high complexity circuit, we use the Strassen’s algorithm to reduce its complexity. We integrate a channel-aware low power FFT processor in the system and the FFT processor can support the FFT size from 128-points to 1024-points. Besides, we use two FFT processor to process the received signal of four receive antennas in order to reduce hardware cost. According to the performance and precoding efficiency, we select the MMSE-OSIC and capacity-SC for MIMO detection and codebook selection. Finally, we use the cell-based design flow to implement the system design for gate level with UMC90nm cell library.