Dynamic-Connected Hybrid Precoding for MIMO-OFDM Systems with Low-Resolution Phase Shifters

To realize the gain guaranteed by the massive multiple-input multiple-output (MIMO) technology with a balanced tradeoff between the performance improvement and the hardware complexity, systems based on dynamic-connected hybrid analog and digital architectures are considered. To provide a more practical design, we in this paper investigate the hybrid precoder design for MIMO-OFDM systems with dynamic-connected architecture and low-resolution phase shifters and propose a design that is suitable for the systems with and without the subarray structure. Simulation results show that our proposed design can have the performance that is almost identical to the state-of-the art designs with the infinite-resolution phase shifters.