Satellite beacon signal demodulation method and device, receiving method and device

A satellite beacon and signal demodulation technology, applied in the field of high-precision satellite beacon signal demodulation, can solve the problems of large error in beacon power estimation, incompatibility with many frequency offsets, rough frequency estimation, etc., so as to improve the frequency estimation Accuracy, small beacon power jitter, and the effect of reducing the design order

CN110493153BActive Publication Date: 2021-09-24四川安迪科技实业有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-09-24

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Abstract

A method for demodulating a satellite beacon signal, comprising the steps of: performing frequency conversion processing on an input signal according to a feedback beacon frequency deviation signal, so that its frequency deviation tends to zero indefinitely; performing first-time filtering and down-sampling processing on the signal; Adjust the amplitude of the signal; perform second filtering and down-sampling processing on the signal; calculate the beacon power of the signal and judge the locking state of the power. A satellite beacon signal demodulation device is characterized in that it includes a frequency converter module, a first filter module, a digital automatic gain amplifier module, a second filter module, an energy estimation module, and a frequency estimation module connected in sequence. The digital closed-loop circuit feedback mechanism and multi-stage digital filter structure are used to realize beacon signal demodulation with high dynamic range and high sensitivity, adapting to large beacon frequency deviation, and at the same time, the demodulated output beacon power refresh rate is fast and stable High, suitable for more types of satellite scenarios, such as communication in motion and communication in stillness.
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Description

technical field

[0001] The invention relates to a single-carrier demodulation technology for satellite communication equipment, in particular to a high-precision satellite beacon signal demodulation method and device, and a receiving method and device that adapt to large frequency deviations. Background technique

[0002] The beacon signal of the satellite is a single-carrier signal with a fixed frequency and amplitude transmitted by the satellite. It is a signal that characterizes the existence and related characteristics of the satellite. It is mainly used for antenna alignment and automatic tracking of satellite uplink earth stations. As we all know, the atmospheric environment in which the satellite is located is relatively complex, and the frequency and amplitude of the beacon signal it transmits will be shifted by the influence of the environment. Therefore, there is an urgent need for a beacon demodulation method with high sensitivity, high dynamic range and adaptabil...

Examples

Embodiment Construction

[0073] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0074] Such as figure 1 or figure 2 As shown, it is a flow chart of two methods in the embodiment of the method implementation mode of the present invention.

[0075] Specifically, a satellite beacon signal demodulation method adapted to a large frequency offset, comprising steps:

[0076] According to the feedback beacon frequency deviation signal, the input signal is frequency-converted so that its frequency deviation tends to zero infinitely;

[0077] Perform the first filtering and downsampling processing on the signal;

[0078] Adjust the amplitude of the signal;

[0079] Perform second filtering and downsampling processing on the signal;

[0080] Calculate the beacon power of the signal and judge the locking situation of the power;

[0081] In an initial state, the fed back beacon frequency deviation signal has a frequency deviation of 0. ...