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A csmg beamforming method based on subspace projection

A technology of subspace projection and beam, which is applied in the field of anti-jamming, can solve the problems of insignificant interference signal suppression effect, slow convergence speed of anti-jamming technology, and high computational complexity, so as to preserve the desired signal, improve the signal-to-interference-noise ratio, The effect of small computational complexity

Active Publication Date: 2021-11-09
SHENYANG AEROSPACE UNIVERSITY
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Problems solved by technology

The traditional anti-jamming technology has slow convergence speed and high computational complexity, so that the interference null formed by the received navigation signal in the direction of the jamming signal is not deep, and the suppression effect on the jamming signal is not obvious

Method used

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  • A csmg beamforming method based on subspace projection
  • A csmg beamforming method based on subspace projection
  • A csmg beamforming method based on subspace projection

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Embodiment Construction

[0051] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0052] Take the signal received by the Beidou navigation receiver as an example, such as figure 1 As shown, 1, 2, ..., M in the figure represent M array antennas, and the method of this embodiment is as follows.

[0053] A CSMG beamforming method based on subspace projection, comprising the following three steps:

[0054] Step 1: The array antenna receives satellite navigation signals and interference signals, and performs space-time joint processing.

[0055] At the front end of the Beidou navigation receiver, there are M array antennas arranged uniformly and linearly. Each array antenna is connected with N taps. After each array element, a Finite Impulse Response (Fini...

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Abstract

The invention provides a CSMG beamforming method based on subspace projection, and relates to the technical field of anti-jamming of navigation receivers. According to the satellite navigation signal and interference signal received by the navigation receiver, the method constructs the interference subspace and its orthogonal complement space, projects the space-time signal vector received by the antenna array into the subspace, and uses the sampling with strict minimum power The matrix gradient algorithm (CSMG) performs beamforming on the projected output signal in a fixed direction. The invention has a strictly constrained sampling matrix gradient algorithm, which has less computational complexity and faster convergence speed; the CSMG beamforming algorithm can form a deeper interference null, which can more effectively suppress interference signals, retain desired signals, and improve Output SINR.

Description

technical field [0001] The invention relates to the technical field of anti-jamming of navigation receivers, in particular to a CSMG beamforming method based on subspace projection. Background technique [0002] my country's Beidou satellite navigation system is still in the development stage. When it is interfered intentionally or unintentionally by the outside world, it will cause errors in the positioning process, or even fail to locate, which will cause serious losses to both military and civilian uses. Interference suppression processing at the front end of the navigation receiver will reduce or even avoid the impact of interference signals on the Beidou satellite navigation system. The traditional anti-jamming technology has slow convergence speed and high computational complexity, so that the interference null formed by the received navigation signal in the direction of the jamming signal is not deep, and the suppression effect on the jamming signal is not obvious. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/21
CPCG01S19/21
Inventor 李玉峰陈亚男
Owner SHENYANG AEROSPACE UNIVERSITY
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