Anti-interference method of satellite navigation receiver

Abstract

The invention discloses an anti-interference method of a satellite navigation receiver. The method includes: firstly, setting an array for lineup; receiving signals through an array antenna and processing the signals; conducting delay processing to the signals; obtaining a reference channel and a surplus reception channel; setting a weight parameter for filtering; conducting error estimation to obtain an error parameter; selecting a step length factor for weight updating; repeating until an algorithm enters a steady state convergence point to obtain a weight of the steady state convergence point; utilizing the weight to filter the signals so as to obtain the signals after anti-interference; sending digital signals after anti-interference processing to a rear-end for processing, or sending the digital signals to a DA (digital to analog) converter to be converted to analog signals for outputting. The anti-interference method of the satellite navigation receiver is small in calculation amount, is favorable for a project to be realized, and is small in data processing capacity, and fine in instantaneity, steady state and anti-interference effect.

Description

technical field [0001] The invention relates to the field of satellite navigation receiver data processing research, in particular to an anti-jamming method for a satellite navigation receiver. Background technique [0002] The antenna of the traditional satellite navigation receiver is an omnidirectional single antenna. It does not consider the azimuth of the satellite. While receiving all the navigation signals from the air, it also receives all the interference signals in the covered frequency band. When the interference intensity exceeds the tolerance limit of the receiver , it will seriously affect the performance of the receiver, making its design function impossible to achieve. For this reason, the adaptive nulling antenna is adopted. In actual work, the physical position of the array unit does not change, but through array signal processing, the direction of the interference signal is distinguished in the air domain, and the space-time joint algorithm is used to adap...

AI Technical Summary

Problems solved by technology

[0046] The invention provides an anti-jamming method for a satellite navigation receiver, which solves the technical problems that the existing anti-jamming method for satellite navigation receivers has a large amount of calculation, is not conducive to engineering realization, has poor real-time performance, and poor anti-jamming effect. The anti-jamming method of the satellite navigation receiver has a small amount of calculation, which is beneficial to the realization of the project, and the data processing amount is small, the real-time performance is good, the stability is good, and the technical effect of the anti-jamming effect is good.

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