A Spurious Suppression Method for Simulated Navigation Satellite Signals

Abstract

The invention discloses a simulation navigation satellite signal stray suppression method. According to the method, a plurality of linear feedback shift register groups are adopted, the generated jitter signal does not have a single periodicity, and the jitter is more noisy, so that the effect of improving the stray is more obvious; and the plurality of jitter sequences are added to the low levelof the phase words, the phase noise introduced by jitter is prevented from being larger than the phase error generated by quantization, and therefore the phase resolution of the signal is prevented from deteriorating.

Description

technical field

[0001] The invention belongs to the technical field of signal processing, and relates to a method for suppressing spurious signals of simulated navigation satellites. Background technique

[0002] The satellite signal simulator simulates the satellite signal received by the front end of the receiver according to the influence of the carrier dynamic characteristics, climate environment and other factors on the satellite signal. It is an indispensable and important tool for receiver development and testing. Due to the involvement of core commercial interests, foreign countries have adopted stricter confidentiality measures for the simulation satellite signal synthesis technology. There are two types of simulation satellite signal synthesis technologies available in open literature: Digital Delay Filter (Digital Delay Filter) and Direct Digital Synthesis (Direct Digital Synthesis, DDS). Among them, compared with the delay filter technology, the DDS signal synth...

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