Methods for digital signal processing in space-based radionavigation receivers

We analyze how the conditions in outer space influence the algorithms for signal search and tracking. A truncated sequential algorithm for signal search is presented. It is shown how to synthesize an algorithm for signal tracking and how to calculate a tracking loop for onboard equipment of satellite navigation (OESN). Recommendations of how to properly select the tracking loop parameters to ensure operation at low signal-to-noise ratios are given. The main problems that must be solved to develop procedures for digital signal processing in OESN are described.