Analysis and optimum design of loop filter in GNSS receiver

The design of loop filter is very important in GNSS receivers. According to design methodology and filter coefficient calculation method, the performance of four filter design methods are analyzed and discussed for frequency response, loop bandwidth and noise equivalent bandwidth. The range of BNT in different methods and deviation of ideal noise equivalent bandwidth are investigated by simulation. According to the simulation results, the optimal loop filter design in GNSS receiver is given. The conclusions can be used for GNSS receiver loop design.