Joint Bit Allocation and Hybrid Beamforming Optimization for Energy Efficient Millimeter Wave MIMO Systems

In this article, we aim to design highly energy efficient end-to-end communication for millimeter wave multiple-input multiple-output systems. This is done by jointly optimizing the digital-to-analog converter (DAC)/analog-to-digital (ADC) bit resolutions and hybrid beamforming matrices. The novel decomposition of precoder combiner three parts introduced at transmitter (TX) receiver (RX), respectively, representing analog precoder/combiner matrix, DAC/ADC resolution matrix baseband matrix. unknown matrices are computed as a solution factorization problem where optimal fully digital or approximated product these A based on alternating direction method multipliers proposed solve problems both TX RX. simulation results show that solution, allocation dynamic during operation, achieves higher efficiency when compared with existing benchmark techniques use fixed resolutions.