Method for reducing false alarm rate of signal channel of navigation receiver and satellite-borne navigation receiver
A technology for navigation receivers and signal channels, applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve problems such as signal false alarms, achieve the effect of improving reliability and reducing channel signal false alarm rates
Active Publication Date: 2021-04-20
NAT UNIV OF DEFENSE TECH
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Problems solved by technology
If the correlation value of the signal channel is abnormal due to single event flipping in the whole process, it will inevitably cause signal false alarm
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[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0019] In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, and connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.
[0020] To solve this problem, refer to figure 1 , a method for reducing the false alarm rate of a navigation receiver signal channel, comprising the following steps
[0021] ...
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The invention discloses a method for reducing the false alarm rate of a signal channel of a navigation receiver and a satellite-borne navigation receiver, and the method comprises the steps: enabling an FPGA in a navigation receiver to give up the three-mode co-operation of a pilot frequency branch, carrying out the full-three-mode setting of a data branch with important message data, and carrying out the DSP-assisted periodic monitoring and comparison of the correlation values of two branches; determining whether an alarm is abnormal currently or not according to the states of the two branches, if the alarm is in an abnormal alarm state, resetting the channel preferentially, and if the state is still abnormal after the channel is reset, allowing alarm informationto be sent. Reliability of the branch can be guaranteed by making the data branch be in a full three-mode mode, the data branch with message data is selected as a basis, and the data branch can be used as a reference basis to help the pilot frequency branch search for problems and recover the problems when entering a normal operation state. Compared with a double-channel part three-mode design in a traditional navigation receiver, the method improves the safety and reliability, and reduces the false alarm rate.
Description
technical field [0001] The invention relates to the field of satellite navigation signal processing, in particular to a method for reducing the false alarm rate of a navigation receiver signal channel and a satellite navigation receiver. Background technique [0002] In the field of aerospace payloads, due to the problem of single event inversion, FPGA devices often need to implement triple-mode redundancy for key parts to improve the reliability of the program. All functional modules cover three modes, and the rational allocation of resources has become an important issue to be considered in improving the device's anti-amplitude noise capability. A navigation receiver generally has a signal channel module, and each signal channel generally has two channels of a data branch and a pilot frequency branch. The integration time of the pilot frequency branch is relatively long and it is also sensitive to weak signals. It is generally used for auxiliary guidance. The code signal ...
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IPC IPC(8): G01S19/13
Inventor 吴健刘哲李聪黄龙李柏渝邱杨鲁祖坤周海洋周彦波刘强
Owner NAT UNIV OF DEFENSE TECH