Different-address interference resistance method for DSSS receiver based on reduced-order open-loop adaptive filtering

An open-loop self-adaptive, receiver technology, applied in the aerospace field, to achieve the effects of ISI suppression, strong anti-ISI capability, and fast ISI suppression

Active Publication Date: 2017-10-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
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Problems solved by technology

[0006] Therefore, the present invention is exactly the technological invention that produces based on the problems referred to above, and as far as the content of the present invention is concerned, there are no reports at home and abroad

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  • Different-address interference resistance method for DSSS receiver based on reduced-order open-loop adaptive filtering
  • Different-address interference resistance method for DSSS receiver based on reduced-order open-loop adaptive filtering
  • Different-address interference resistance method for DSSS receiver based on reduced-order open-loop adaptive filtering

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Embodiment Construction

[0041] A DSSS receiver anti-interference method based on reduced-order open-loop adaptive filtering, comprising the following steps:

[0042](1) Set the upper limit of the number of iterations, set the initial value of the iteration counter to 0, set the filter order of the filter module in the reduced-order open-loop adaptive filter module to 2N-1, N is a positive integer not greater than L, and L is a The number of sampling points in the pseudocode period;

[0043] (2) The matched filter module receives the digital baseband signal according to the formula (1) Perform matched filtering to obtain the matched filtering result Output to the filter module and the complex amplitude initial value calculation module in the reduced-order open-loop adaptive filter module;

[0044]

[0045] in, Represents the received signal sampling sequence within a pseudocode period, Indicates the pseudo-code sampling sequence corresponding to a pseudo-code period of channel k, k=0,1,2......

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Abstract

The invention provides a different-address interference resistance method for a DSSS receiver based on reduced-order open-loop adaptive filtering. An adopted system comprises a matched filtering module and a quick open-loop adaptive filtering module formed by complex amplitude initial value calculation module, filtering, correlation function calculation and filter coefficient calculation modules. Through matched filtering and open-loop adaptive filtering of a receiving signal, cross-correlation caused by different-address interference is suppressed, the complex amplitude estimation of different delay signals within the observation time is obtained, so that the detection and the parameter estimation of the receiving signal are realized.

Description

technical field [0001] The invention relates to a method for resisting different-site interference of a DSSS receiver, in particular to a method for resisting different-site interference of a DSSS receiver based on reduced-order open-loop adaptive filtering, and belongs to the aerospace field. Background technique [0002] Direct Sequence Spread Spectrum (DSSS) signals have the advantages of high concealment, anti-interception, and strong interference capabilities, and have been widely used in satellite navigation and positioning systems, aerospace measurement and control communication systems, and civil communications. The DSSS receiver realizes the detection and synchronization of the received signal by using the correlation characteristics of the modulated pseudo-code in the DSSS signal. However, in a multi-user system based on DSSS, since the pseudo-code sequences assigned by different users are not completely orthogonal, their cross-correlation function is not zero, res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7097
CPCH04B1/7097
Inventor 申宇瑶汪文韬王永庆吴嗣亮于秀丽马淑芬刘东磊
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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