Multi-Band Superresolution Multipath Channel Path Delay Estimation for CIR-Based Localization

Abstract

The channel path delay estimation (PDE) plays an essential role in channel impulse response (CIR)-based localization techniques. Several state-of-the-art superresolution path delay estimation (SPDE) approaches have been proposed to provide more precise PDE based on eigendecomposition. Although superresolution techniques reduce the bandwidth requirement on the sensor, the achievable resolution is still limited. The resolution can be further improved when measurements on different frequency bands are combined. In this paper, we propose an approach to combine the frequency-domain channel estimates on different nonconsecutive frequency bands to provide a better resolution for the PDE. The performance is evaluated with numerical simulations.