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Space-time adaptive anti-interference method for satellite navigation receiver

A space-time self-adaptive, satellite navigation technology, applied to satellite radio beacon positioning systems, measuring devices, instruments, etc., to achieve the effect of improving the quality of received signals and improving the performance of capture and tracking

Inactive Publication Date: 2015-02-11
西安烽火电子科技有限责任公司
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Problems solved by technology

However, the subspace orthogonal projection algorithm can only eliminate strong interfering signals

Method used

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  • Space-time adaptive anti-interference method for satellite navigation receiver

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Embodiment Construction

[0020] refer to figure 1 , is a structural schematic diagram of performing space-time adaptive processing through an FIR filter in the prior art. combine figure 1 , in the existing space-time adaptive processing method, a plurality of array elements of the antenna array are usually used to receive signals, and the number of array elements of the antenna array is denoted as M, and M is a natural number greater than 1. An FIR filter with a delay unit of P is set behind each array element of the antenna to perform space-time adaptive processing, and P is a natural number greater than 1. use w mp Indicates the p-th delay unit coefficient of the m-th FIR filter, m ranges from 1 to M, and p ranges from 1 to P. use x m (n) represents the received signal of the mth array element at the n moment, then the snapshot (snapshot) data x of the mth array element at the n moment m (n) is:

[0021] x m (n)=[x m (n),x m (n-1),...x m (n-P+1)] T

[0022] Among them, the superscript T ...

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Abstract

The invention belongs to the technical field of space-time adaptive processing and particularly relates to a space-time adaptive anti-interference method for a satellite navigation receiver. The space-time adaptive anti-interference method comprises the following specific steps of performing eigenvalue decomposition on a covariance matrix Rxx of a signal received by an antenna array of the satellite navigation receiver at n time; combining feature vectors corresponding to minimum M-L eigenvalues of the Rxx into a signal subspace PG, and obtaining a projection ysub of a signal X(n) received by the antenna array of the satellite navigation receiver at the n time, in the signal subspace PG; obtaining an expression of the carrier-to-noise ratio (C / N0) of the signal after an output signal subjected to the space-time adaptive processing at the n time is correlated, and establishing an optimization model about a weight vector by taking the carrier-to-noise ratio (C / N0) of the signal after maximization correlation as an object; solving the optimization model about the weight vector to obtain an optimal weight vector w0; performing weighting processing on the projection ysub of the signal X(n) received by the antenna array of the satellite navigation receiver at the n time, in the signal subspace PG to obtain an output signal Y(n) subjected to the space-time adaptive processing at the n time.

Description

technical field [0001] The invention belongs to the technical field of space-time adaptive processing, in particular to a space-time adaptive anti-jamming method for a satellite navigation receiver. Background technique [0002] At present, the space-time adaptive anti-jamming technology has been widely used in the anti-jamming of satellite navigation receivers. The general principle is: using an adaptive antenna array, by controlling the weighting coefficients of each array element in the array, the pattern of the antenna is changed to make it produce a deep null in the direction of interference, thereby eliminating or suppressing interference. Most of the existing space-time adaptive anti-jamming methods focus on how to design deep nulls in the jamming direction, and only pay attention to the suppression ability of jamming signals, while ignoring the influence of the anti-jamming processing process on satellite signals. [0003] With the wide application of GNSS (Global N...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/21
CPCG01S19/21
Inventor 赵宏伟杨勇史萌萌王君方张宝强史彦芳李钧
Owner 西安烽火电子科技有限责任公司
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