Multi-path interference elimination method and device, estimation method and device, and receiver

Abstract

The invention relates to a multipath interference elimination method, a channel impulse response frequency spectrum estimation method, a multipath interference elimination device, a channel impulse response frequency spectrum estimation device and a receiver. The multipath interference elimination method comprises the following steps: acquiring a cross-correlation signal frequency spectrum of a GNSS input signal and a receiver local signal; weighting the cross-correlation signal frequency spectrum to obtain a weighted frequency spectrum; performing sliding window summation on the weighted frequency spectrum to obtain a sliding window summation frequency spectrum; performing normalization processing on the sliding window summation frequency spectrum to obtain a channel impulse response frequency spectrum; and converting the channel impulse response frequency spectrum to a time domain to obtain a time domain waveform of the channel impulse response, and carrying out code phase deviation identification on the time domain waveform to obtain a code phase deviation of a direct path so as to eliminate multipath interference. According to the invention, the code phase deviation can be accurately estimated after the multipath signal is overlapped with the direct incidence path.

Description

technical field [0001] The present disclosure relates to the field of communication technologies, and in particular, to a method for eliminating multipath interference, a method for estimating a channel impulse response spectrum, an apparatus for eliminating multipath interference, an apparatus for estimating a channel impulse response spectrum, and a receiver. Background technique [0002] The Global Navigation Satellite System (GNSS) can realize all-weather, global and high-precision continuous navigation and positioning, and has developed rapidly in recent years. When the receiver on the ground receives the signal sent by the GNSS, it needs to calculate the deviation of the code phase at the current moment relative to the received GNSS code phase. [0003] In the prior art, the shape information of the autocorrelation function of a PRN code (Pseudo Random Noise Code, pseudo-random noise code) is usually used to estimate the code phase deviation. [0004] However, when th...

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Problems solved by technology

[0006] The purpose of the present disclosure is to provide a method for eliminating multipath interference, a method for estimating a channel impulse response spectrum, a device for eliminating multipath interference, a device for estimating a channel impulse response spectrum, and a receiver, so as to overcome the problem of multipath interference at least to a certain extent. After the path signal overlaps with the direct path, there is a problem that the code phase deviation cannot be accurately estimated

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