Deployment Optimization of Uniform Linear Antenna Arrays for a Two-Path Millimeter Wave Communication System

This letter is concerned with the array design of a fixed point-to-point millimeter wave (MMW) communication system consisting of two paths between the transmitter and receiver. We assume uniform linear antenna arrays (ULAs) at both the transmitter and receiver and focus on the optimization of antenna deployment to maximize the system capacity with uniform power allocation. We analytically show that, at high signal-to-noise ratios (SNRs), the channel capacity depends on the spatial correlations between the two paths at both link ends. The optimal antenna array deployment that maximizes the channel capacity is derived. Numerical results show that the optimized antenna array deployment considerably improves the channel capacity, compared to the non-optimized deployment.