Satellite signal monitoring method and system
A satellite signal and monitoring system technology, which is applied in the field of satellite signal processing, can solve the problems of satellite navigation receivers not positioning, unable to provide accurate basis for troubleshooting of signal-to-noise ratio problems, receiver tracking loop loss of lock, etc., to achieve good engineering The effect of applying the foreground
Active Publication Date: 2020-02-28
BEIJING AUTOMATION CONTROL EQUIP INST
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In most cases, these interferences will only cause a reduction in the carrier-to-noise ratio of the signal received by the satellite navigation receiver, but in severe cases, it will also cause the receiver tracking loop to lose lock, so that the satellite navigation receiver will not be positioned
At the same time, satellite navigation receivers generally do not exceed 4bit quantization to digitally sample the input signal. When the signal is attenuated due to component failure or signal feeder damage, it is easy to affect the carrier-to-noise ratio of the received signal and even cause non-location phenomenon.
[0004] At present, an identification system for satellite signal navigation frequency band interference signals has appeared, and the interference signals in the 25-3000MHz wide frequency range have been monitored by building a monitoring system, but the related algorithms or systems are too complicated to be integrated in satellite receivers. Provide an accurate basis for troubleshooting when the signal-to-noise ratio is reduced or the location is not located
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[0045] 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 with each other. The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0046] It should be noted that the terminology used here is only for describing specific implementations, and is not intende...
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The invention provides a satellite signal monitoring method and system. The method comprises the following steps: 1, acquiring noise power of a signal received by a satellite navigation receiver without environmental interference; 2, taking the noise power obtained in the step 1 as a reference, calibrating a noise power value in a certain range by inputting different power signals to the satellitenavigation receiver, enabling the noise power value in the certain range to correspond to a power word, and outputting the power word; and 3, judging whether the signal received by the satellite navigation receiver is interfered or whether a signal transmission link is normal according to the size of the power word. According to the scheme, an accurate basis is provided for troubleshooting when the signal-to-noise ratio of the satellite receiver is reduced or the satellite receiver is not positioned, and compared with the prior art, the designed algorithm and system composition are simple andeasy to implement and have good engineering application prospects.
Description
technical field [0001] The invention relates to the field of satellite signal processing, in particular to a satellite signal monitoring method and system. Background technique [0002] The satellite navigation system includes GPS, GLONASS, "Beidou", GALILEO, "Zenith" and other global and regional augmentation systems. Since the orbital height of the navigation satellite is about 20,000 to 30,000 kilometers from the earth's surface, the satellite navigation signal reaches the earth's surface Very faint, usually hidden by background noise. The satellite navigation receiver obtains the spread spectrum gain through correlation processing to extract the satellite navigation signal from the background noise, and obtains information such as pseudo-range observation and navigation message, and realizes the function of positioning and speed measurement. In general, the satellite navigation signal is 20-30dB lower than the background noise (one percent to one thousandth of the backg...
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IPC IPC(8): G01S19/23
CPCG01S19/23
Inventor 祖秉法李育龙王强胡文涛左启耀付晶晶何子君张燎刘路
Owner BEIJING AUTOMATION CONTROL EQUIP INST