A method for dual-channel monopulse angle error detection in frequency domain

A dual-channel, single-pulse technology, applied in measurement devices, sustainable communication technology, radio wave measurement systems, etc., can solve the problems of low delay correction accuracy and phase correction accuracy, signal bandwidth and signal type adaptability, etc. , to achieve the effect of improved precision, simple structure and easy upgrade

Active Publication Date: 2018-12-11
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

However, the single channel causes the tracking receiver to work at a higher signal-to-noise ratio. Some single-pulse tracking receivers use a dual-channel time-domain angle error detection method, and the time-domain angle error demodulation can only achieve relatively low Low delay correction accuracy and phase correction accuracy, and the adaptability to signal bandwidth and signal type is not strong

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  • A method for dual-channel monopulse angle error detection in frequency domain
  • A method for dual-channel monopulse angle error detection in frequency domain
  • A method for dual-channel monopulse angle error detection in frequency domain

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[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0025] A method for double-channel single-pulse angle error detection in the frequency domain, assuming that the signal processing processes of the sum signal processing channel and the difference signal processing channel are as follows:

[0026] 1. After the received RF signal is amplified by two identical channels of low-noise and analog down-converters, the frequency of the received signal is converted to a suitable center frequency and adjusted to a suitable amplitude. Assume that the sum signal processed by the analog down-converter is the same as The difference signals are:

[0027]

[0028] where ω 1 is the center frequency of the sum signal, θ( ) is the phase function of the received signal with zero mean val...

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Abstract

The invention discloses a method for detecting dual-channel monopulse angle error in frequency domain, belonging to the technical field of radio frequency antenna self-tracking. The invention includesFFT processing of the sum signal and the difference signal receiving channel, correlation and accumulation of sum signal and the difference signal, filtering between FFT frames, normalization and other processing steps, and realizes the detection of high-performance monopulse angle error. The digital demodulation of the angular error based on the frequency domain has the advantages of many kindsof working signals, fast response speed, high integration degree, low working signal-to-noise ratio, convenient delay correction and high phase correction precision, and is an important improvement to the prior art.

Description

technical field [0001] The invention relates to the technical field of radio frequency antenna self-tracking, in particular to the monopulse tracking technology of a parabolic multi-mode feed antenna used in satellite communication, and in particular to a method for double-channel monopulse angle error detection in the frequency domain. Background technique [0002] At present, most monopulse tracking receivers use a single-channel angle error detection method, for example, various modulated envelope detection methods or correlation detection methods. However, the single channel causes the tracking receiver to work at a higher signal-to-noise ratio. Some single-pulse tracking receivers use a dual-channel time-domain angle error detection method, and the time-domain angle error demodulation can only achieve relatively low The accuracy of delay correction and phase correction is low, and the adaptability to signal bandwidth and signal type is not strong. Contents of the inve...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185G01S19/23G01S19/24
CPCG01S19/23G01S19/24H04B7/1855Y02D30/70
Inventor 李强
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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