Performance of a New Low-Complexity Angular Spread Estimator in the Presence of Line-of-Sight

This paper focuses on the problem of angular spread (AS) estimation at the base station in a macro-cellular system when a line-of-sight (LOS) component is potentially present. We will limit our study to low-complexity methods prone to practical implementation. The paper demonstrates the limitations of the well-known low complexity AS estimation method, spread root-MUSIC. As supported by simulations, it introduces a lower complexity "look-up table" (LUT) based approach that compares advantageously with spread root-MUSIC from the point of view of complexity and performance.