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Space-time anti-interference method for block Toeplitz matrix low-complexity inversion

A space-time anti-jamming and low-complexity technology, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve problems such as increased computation

Active Publication Date: 2015-09-16
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

However, the calculation amount of the traditional matrix inversion method mentioned above is still the same as that of K 3 Proportional to , the amount of calculation will still grow rapidly with the increase of the number of taps in the domain

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  • Space-time anti-interference method for block Toeplitz matrix low-complexity inversion
  • Space-time anti-interference method for block Toeplitz matrix low-complexity inversion

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Embodiment Construction

[0081] Below, the present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0082] The invention is applied to the optimization design of the filter weight of the space-time anti-jamming filter for array signal processing. as attached figure 1Shown is a structural block diagram of a space-time filter with N array elements and K delay taps behind each array element. After each antenna element receives the signal, it undergoes down-conversion and digital-to-analog conversion to obtain a digital intermediate frequency signal, and then converts it into a complex baseband signal through digital down-conversion. The complex baseband signal of array element 1 passes through K-1 delay units in turn to obtain x 11 , x 12 ,...,x 1K , the complex baseband signal of array element 2 passes through K-1 delay units sequentially to obtain x 21 , x 22 ,...,x 2K , and so on, the complex baseband signal of array element N passes ...

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Abstract

The invention belongs to the technical field of array signal processing, and relates to a space-time anti-interference method for block Toeplitz matrix low-complexity inversion. The method specifically comprises the following steps: (S1) performing initialization, and expressing a space-time weight solving problem as a linear equation set solving problem; (S2) calculating the approximate value of a sampling covariance matrix, and using stationarity assumption to ensure that the estimated value of the sampling covariance matrix is a block Toeplitz matrix; (S3) re-expressing the space-time weight solving problem in the form of a partitioned matrix; (S4) defining variables and operators required for iterative solving of the space-time weight; and (S5) decomposing the solving of the space-time weight into iterative solving of a series of equation sets to obtain the space-time weight finally. The invention puts forward a low-complexity method for iteratively solving the space-time weight. The method has the same performance as a traditional SMI method on the premise of adopting the same anti-interference principles. By adopting the method of the invention, the computational complexity is reduced greatly.

Description

technical field [0001] The invention belongs to the technical field of array signal processing, and specifically relates to a space-time anti-jamming method for low-complexity inversion of a block Toeplitz matrix, which is suitable for a space-time filtering processing method of an anti-jamming antenna array, and is especially suitable for working in a jamming environment Satellite navigation receivers can also be used in other types of adaptive array signal processing. Background technique [0002] Satellite navigation signals are very weak when they reach the ground and are highly susceptible to intentional or unintentional interference. In fields with high reliability requirements such as military applications and aviation applications, satellite navigation receivers usually use adaptive antenna array technology to improve their anti-jamming capabilities. In order to utilize the degrees of freedom in the space and time domains at the same time, the anti-jamming antenna a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/21
CPCG01S19/21
Inventor 吴舜晓黄仰博聂俊伟欧钢吕志成朱祥维肖志斌王勇刘小汇
Owner NAT UNIV OF DEFENSE TECH
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