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Estimator, Estimation Method, Eliminator and Elimination Method of Continuous Wave Interference Signal

A signal estimator and signal cancellation technology, which is applied in the field of satellite navigation and positioning, can solve the problems of high complexity and large amount of calculation, and achieve the effect of narrowing the processing bandwidth, speeding up the processing speed, and reducing the difficulty of hardware implementation

Active Publication Date: 2017-06-13
HERONAV BEIJING TECH DEV
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  • Claims
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Problems solved by technology

This improved method does not need to know the frequency point of narrowband interference in advance, but the complexity of technical implementation is high, the amount of calculation is large, and it needs a certain stabilization time

Method used

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  • Estimator, Estimation Method, Eliminator and Elimination Method of Continuous Wave Interference Signal
  • Estimator, Estimation Method, Eliminator and Elimination Method of Continuous Wave Interference Signal
  • Estimator, Estimation Method, Eliminator and Elimination Method of Continuous Wave Interference Signal

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Embodiment Construction

[0055] In order to make the object, technical solution and advantages of the present invention clearer, various embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that, in each implementation manner of the present invention, many technical details are provided for readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0056] The first embodiment of the present invention relates to an estimator of a continuous wave interference signal, the structure of which is as follows figure 1 with figure 2 As shown, it specifically includes: a digital phase-locked loop 100 , an amplitude detector 200 and a signal generator 300 . Among them, the dig...

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Abstract

The invention relates to the field of sanitary navigation and location and discloses a continuous wave interference signal estimator, an estimation method, a remover and a removing method. A digital phase-locked ring is adopted to detect the frequency or sine wave and amplitude of a continuous wave interference signal, a continuous wave interference estimation signal can be obtained easily, so that the continuous wave interference estimation signal can be removed conveniently. The digital phase-locked ring is a common circuit, FFT conversion and FFT reverse conversion are not required to be conducted on time domain signals received by a global navigation satellite system (GNSS) in real time, and complex technologies such as the FFT conversion and the FFT reverse conversion are avoided. The problem in the prior art that a continuous wave interference frequency point needs to be known in advance is solved. Further, a frequency band of a radio frequency front end output signal is divided into a plurality of sub frequency bands, the plurality of sub frequency bands can be processed respectively, hardware achieving difficulty is further reduced, and the processing speed is increased.

Description

technical field [0001] The invention relates to the field of satellite navigation and positioning, in particular to an estimator, an estimation method, an eliminator and an elimination method of continuous wave interference signals. Background technique [0002] As a new generation of satellite navigation and positioning system, GPS not only has global, all-weather, continuous and precise three-dimensional navigation and positioning capabilities, but its rapid development has also attracted widespread attention from military departments and civilian departments in various countries. GNSS (Global Navigation Satellite System, Global Navigation Satellite System) satellite signals usually use spread spectrum communication (Spread Spectrum Communication, spread spectrum communication), that is, the signal bandwidth used to transmit information is much larger than the minimum bandwidth necessary for the transmitted information. [0003] GNSS receivers will be subject to various el...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/21
CPCG01S19/21
Inventor 吴骏李瑞寒文力王永平冯卫锋宋志豪迟朋段桂平刘精轶孙枫叶刘宝舒志萍李义梅蔡之君
Owner HERONAV BEIJING TECH DEV
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