Abstract:

By using the spatial correlation characteristics of the beam steering vector with antenna array, as similar to the traditional phase lock loop (PLL) a closed loop can be constructed to realize the direction of arrival (DOA) tracking for global navigation satellite system (GNSS) signals by using beamforming. The three most popular implementations of discriminators in the DOA tracking loop are named as the coherent method with real part subtraction, normalization methods with amplitude subtraction and power subtraction. Firstly, a DOA tracking model in the GNSS receiver with antenna array is established by using beamforming, and then the performances of the DOA discriminator are analyzed from three different aspects which are gain, convergence range and noise variance, finally simulation verifications are carried out.