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There have been remarkable advancements in sensor array signal processing in recent years, fueled by the growing demand for high-performance communication and radar systems. Sensor arrays, comprising multiple spatially distributed sensors, offer unique capabilities for signal detection, estimation, and spatial processing. Recently, new array signal processing techniques like coprime and nested array signal processing have garnered considerable attention owing to their ability to expand the aperture, enhance the spatial resolution, increase the degrees of freedom, and mitigate mutual coupling. These techniques have applications across diverse domains such as wireless communication, MIMO radar techniques, and satellite navigation.

This Reprint aims to provide a comprehensive overview of the latest developments in sensor array signal processing and their applications, including sparse array design in MIMO radar system, a wideband sparse array system, target localization using multiple arrays, array signal processing enhancement in a multipath environment, and an array-based wireless communication system, to name a few.