Adaptive power reduction method suitable for space-time interference resistance
A space-time anti-jamming and self-adaptive technology, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve the problem of increased autocorrelation matrix and inversion calculations, increased system power consumption, and difficult programmable hardware implementation. and other problems to achieve the effect of ensuring anti-interference performance, reducing power consumption, and reducing system power consumption
Active Publication Date: 2018-05-29
BEIJING AUTOMATION CONTROL EQUIP INST
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The number of array elements is M, the number of beats is N, and the dimension of the matrix is MN. With the increase of the matrix dimension, the calculation amount of the autocorrelation matrix and inversion will increase greatly, which is difficult to realize in programmable hardware such as FPGA. , at the same time, in the case of consuming a lot of hardware resources, the power consumption of the system will also increase greatly
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[0032] An adaptive power consumption reduction method suitable for space-time anti-jamming according to the present invention will be described in detail below with reference to the drawings and embodiments.
[0033] An adaptive power consumption reduction method suitable for space-time anti-interference of the present invention, according to the number of interferences and the detection results of interference power, adaptively adjusts the number of array elements participating in the anti-interference and the number of beats. When the interference intensity is strong, increase the number of beats. When the number of interference is large, increase the number of array elements participating in anti-interference. When the interference intensity is small, reduce the number of beats. When the number of interference is small, reduce the parameter anti-interference. The number of array elements, by adaptively adjusting the number of beats and the number of array elements participat...
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The invention belongs to the technical field of signal processing of a satellite navigation receiver, and in particular relates to an adaptive power reduction method suitable for space-time interference resistance. The adaptive power reduction method of the present invention includes the following steps: AD sampling data power calculation; power detection threshold setting; covariance calculation;eigenvalue calculation of a covariance matrix; and anti-interference algorithm switching when there is no interference. The method needs to solve the technical problem that the existing satellite navigation receiver anti-interference method can greatly increase the power consumption of the system, sets several power detection thresholds, and only adapts to adjust the beat time of the array elements, which not only ensures the anti-interference performance, but also reduce the system power consumption. In addition, according to the number of eigenvalues of the covariance matrix exceeding the maximum eigenvalue of the noise floor, the array elements participating in the interference resistance are selected for adjustment, and the power consumption of the system is further reduced while ensuring the anti-interference performance.
Description
technical field [0001] The invention belongs to the technical field of satellite navigation receiver signal processing, and in particular relates to an adaptive power consumption reduction method suitable for space-time anti-jamming. Background technique [0002] In practical applications, satellite receivers are likely to be subject to artificial interference or sudden interference from the environment. Generally, receivers need to use anti-jamming algorithms. [0003] At present, satellite navigation receivers generally use array antennas for anti-interference, and certain array signal processing algorithms can form nulls in the direction of interference and suppress interference signals. [0004] Sampling matrix inversion algorithm (SMI) is a commonly used anti-interference algorithm. In order to improve the suppression effect on broadband interference signals, it is necessary to perform delay-beat processing on the signals collected by the channels corresponding to each ...
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IPC IPC(8): G01S19/21
CPCG01S19/21
Inventor 李育龙左启耀付晶晶祖秉法王黎斌陈赟王强刘峰
Owner BEIJING AUTOMATION CONTROL EQUIP INST