We develop a channel estimation algorithm for wideband millimeter wave (mmWave) systems using low-resolution phase shifters (PSs). Since the limited scattering feature of mmWave channels, the estimation problem is formulated as a compressive sensing (CS) problem. To avoid the mismatch between the continuous and discrete spatial frequencies, we propose an adaptive grid matching pursuit algorithm to reduce the signal power leakage. Moreover, a hybrid precoding design is developed using low-resolution PSs. Simulation results demonstrate the advantage of the proposed channel estimation with an improved accuracy over the orthogonal matching pursuit (OMP) method. Furthermore, it is shown that the proposed channel estimation method can approach a close spectral efficiency to that achieved by the perfect channel knowledge.
Channel Estimation Using Low-Resolution PSs for Wideband mmWave Systems
01.06.2017
371509 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch