Optimization Selection of the HRC Correlator Spacing for Different Navigation Signals

Abstract

Multipath effect is the major factor which influences the precision of navigation and positioning. EML is the method which realized easily, it is still used by many receivers to mitigate multipath in the loops. But HRC performs better in multipath mitigation and will be used in the engineering practice, but the researches by now mostly focus on the ordinary characteristics or only for BPSK signals, and lack of deep and system research, and the application in practice should select different correlator spacing for different signals. To solve the problems above, this paper mainly researches the scope of code phase discrimination and performance of multipath mitigation, and proposes the methods of optimization selection of the HRC correlator spacing, and gains the scope to select. Simulation results show that, the HRC correlator spacing should be selected different for different signals, the phase discrimination scopes become wider as the correlator spacing increases, the performance of multipath mitigation increases as the correlator spacing decreases, and the performance of multipath mitigation does not improve distinctly as the correlator spacing decreases in a small correlator spacing and narrow baseband, and the correlator spacing should be selected wider in a certain extent in order to increase the scope of discrimination. The researches in the paper are innovative and practically valuable and have important theory values and can perform an important director meaning for engineering practice.