Robust anti-interference processing method and device of spread frequency system

A technology of spread spectrum system and processing method, applied in the field of robust anti-interference processing method and device of spread spectrum system, capable of solving problems such as interference suppression

Inactive Publication Date: 2015-06-17
BEIJING BDSTAR NAVIGATION CO LTD +1
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Problems solved by technology

[0003] The invention provides a robust anti-interference processing method and device for a spread spectrum system, and the technical problem to be solved is the problem of interference suppression when data is mismatched

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  • Robust anti-interference processing method and device of spread frequency system
  • Robust anti-interference processing method and device of spread frequency system
  • Robust anti-interference processing method and device of spread frequency system

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[0055] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0056] figure 1 It is a flow chart of the robust anti-interference processing method of the spread spectrum system provided by the present invention. figure 1 The methods shown include:

[0057] 101. For the M receiving array elements of the space-frequency two-dimensional processor, respectively accumulate N segments of intermediate frequency AD sampling signals with a length of K, and respectively perform K-point fast Fourier transform on the intermediate frequency AD sampling signals to obtain a frequency domain array:

[0058] x 11 ,X 12 ,…X 1K ;X 21 ,X ...

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Abstract

The invention provides a robust anti-interference processing method and device of a spread frequency system. The method includes the steps that N sections of intermediate frequency AD sampling signals of which the length is K are accumulated for M receiving array elements of a space frequency two-dimensional processor respectively, and K-point fast Fourier transformation is performed on the intermediate frequency AD sampling signals to obtain a frequency domain array; 102, the number B of frequency points, corresponding a whole bandwidth, of a satellite signal bandwidth is determined; 103, covariance matrixes Rb of the B frequency points in the signal bandwidth are calculated; 104, characteristic decomposition is performed on the covariance matrix Rb of each frequency point, so that the characteristic decomposition expression of each covariance matrix Rb is obtained; 105, according to the characteristic decomposition expression of each covariance matrix, the weight vector of the corresponding frequency point under the constraint of a diagonal loading matrix is determined; 106, the weight vectors wb of all the frequency points are used for performing spatial filtering processing on the frequency domain array; 107, K-point fast Fourier inversion transformation is performed on frequency domain data after spatial filtering, so that time-domain intermediate frequency data are obtained.

Description

technical field [0001] The invention relates to the communication field, in particular to a robust anti-interference processing method and device for a spread spectrum system. Background technique [0002] Narrowband and broadband interference with high power density has become the most important factor that destroys military navigation systems. Array antenna zeroing technology is the main method to improve the anti-jamming ability of satellite navigation receivers. When suppressing space interference, it updates the weight vector in the A null point is formed in the direction of arrival of the interference to eliminate the spatial interference. However, pure spatial filtering is limited by the number of degrees of freedom in the array, which cannot meet the complex interference and application in multipath environments, and the space-time domain beamforming method with increased time domain freedom increases the complexity of calculating adaptive weights. , resulting in po...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7097
Inventor 不公告发明人
Owner BEIJING BDSTAR NAVIGATION CO LTD
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