Simulation And Realization Of Evil Navigation Signals

Integrity is an important requirement of the satellite navigation system. To studythe technology of Signal Quality Monitoring (SQM)， we shuold estimate theperformance of the SQM methods，and use evil navigation signals to do experiments。But most navigation signal equipments can’t produce the required evil waveforms, soit is of a great significance in engineering to simulate and realize evil navigationsignals.The simulation and realization of evil navigation signals is the core of this paper.This paper sorts the evil navigation cases which already occurred, analyses their causesand builds the models of evil waveforms. Then it designs evil navigation signals suchas evil correlation functions. At last, the evil navigation signals are received and testedin a navigation reciever，which make the evil navigation signal equipment into use，andis of great importance in engineering。It mainly contains four sections:In section I, this paper introduces status in quo of SQM of satellite navigationsystems at present, and the backgrouds of simulation and realization of evil navigationsignals, the simulation and realization of evil navigation signals is an indispensablecondition of SQM, there are shortcomings of evil navigation signal models.In section II, most articles only study evil correlation functions, while this papergenerally analyses the reported evil navigation cases home and abroad, sums up the evilnavigation cases’ characteristics, and summarizes several representative evil types，including correlation function, atomic clock, time delay, carrier wave, power andnavigation message, which make the evil signals more comprehensive. Then itintroduces the models of evil signals. In addition, the cross-PSD of digital distortion isin divergence, this paper summarizes it and get a conclusion.In section III, this paper simulates and realizes evil navigation signals, designs thescheme of evil navigation signal equipment, compare the normal signals and evil signals,and test the models of evil signals.In section IV, the evil navigation signals are received and tested in a navigationreceiver. This paper introduces the methods and equipments of evil navigation signaltesting, and analyzes every evil signal with pseudorange measurement datas and powermeasurement datas in the reciever. The satellite navigation evil signals have beenapplied in practice, which is greatly significant in engineering.