A multi-beam pointing anti-interference processing method for satellite navigation receiving system
A receiving system and satellite navigation technology, applied in satellite radio beacon positioning systems, radio wave measurement systems, measurement devices, etc., can solve the problems of no useful signal array gain, no signal multipath effect suppression, etc., and achieve interference suppression. The effect is good, the anti-interference ability is improved, and the algorithm principle is simple.
Active Publication Date: 2018-03-09
BEIJING AEROSPACE INST OF THE LONG MARCH VEHICLE +1
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Problems solved by technology
Traditional interference suppression methods mostly use space-time power inversion algorithms, use antenna arrays to receive satellite navigation signals, and increase the degree of freedom in the time domain during processing, but due to the limitation of algorithm principles, neither the array gain for useful signals is formed, Without suppressing the multipath effect of the signal
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[0039] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0040]The invention provides a multi-beam pointing anti-jamming processing method that can be applied to a satellite navigation receiving system. The method can not only effectively suppress suppression-type interference, but also enhance satellite signals, thereby reducing the influence of multi-path interference.
[0041] Such as figure 2 The shown method processing flowchart, the multi-beam pointing anti-jamming processing method for the satellite navigation receiving system of the present invention comprises the following steps:
[0042] (1), in this satellite navigation receiving system, adopt N-element antenna array to carry out signal reception, at first will carry out filtering, frequency down-conversion, digital-to-analog conversion processing on the N-way radio frequency signal that this antenna array receives, obtain N baseband signa...
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The invention provides a multi-beam directional anti-interference processing method for a satellite navigation reception system. According to the method, at the initial moment, time space anti-interference weight is calculated according to a minimum power algorithm, an output signal is captured and tracked after weight of the time space anti-interference weight, a captured and tracked local signal is taken as an expectation signal to carry out minimum mean squared error calculation to acquire time space wave beam direction weight capable of forming wave beams in a satellite signal direction, after weight processing on the time space wave beam direction weight, the signal is utilized to inhibit compaction interference, moreover, satellite signals are improved, influence of multipath interference can be effectively inhibited, and anti-interference capability of the satellite navigation system is greatly improved. According to the method, wave beam direction for the captured and tracked signal is not only realized, observation on non-captured satellites can be carried out in real time, when situations of satellites change, wave beam direction is updated in real time, the algorithm principle is simple, and the interference inhibition effect is good.
Description
technical field [0001] The invention belongs to the field of array signal processing, in particular to a multi-beam pointing anti-jamming processing method for a satellite navigation receiving system. Background technique [0002] In the satellite navigation receiving system, since the power of the satellite navigation signal reaching the ground is very weak, about -160dBW, which is usually 20dB lower than the thermal noise power of the receiver, the signal-to-noise ratio entering the receiver is very low, which directly leads to satellite navigation The susceptibility of the system to interference. [0003] Interference includes man-made interference such as deceptive interference and suppression interference, as well as various multipath interference caused by the external environment. Traditional interference suppression methods mostly use space-time power inversion algorithms, use antenna arrays to receive satellite navigation signals, and increase the degree of freedom...
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IPC IPC(8): G01S19/21
CPCG01S19/21
Inventor 李莎莎陈莽王晓飞金文张飞陈浩曹达彩赵利军彭云张瑞鹏王遂学谭志红
Owner BEIJING AEROSPACE INST OF THE LONG MARCH VEHICLE