Frequency domain anti-jamming method and device based on adaptive threshold decision
An adaptive threshold and judgment technology, which is applied in measuring devices, satellite radio beacon positioning systems, instruments, etc., can solve problems such as poor real-time performance, inability to completely suppress interference edges, and low signal-to-noise ratio, and achieve accuracy and realization The effect of adaptability
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[0026] The following examples refer to Figure 1-3 .
[0027] In this example, the satellite system is the second-generation B1 frequency point system of BD, and the frequency range of the satellite signal is 1.559098GHz~1.563098GHz. The antenna is a single-element antenna, and the specific steps are as follows:
[0028] a) A / D sampling: The satellite signal and interference signal received by the single-array element antenna are down-converted to obtain an intermediate frequency analog signal, and then A / D sampling is performed on the intermediate frequency analog signal to obtain a digital real signal.
[0029] b) Removing the zero-frequency signal: Perform real-time statistics of the mean value of the digital signal sampled by the A / D, and then subtract the mean value from the signal to remove the zero-frequency signal.
[0030] c) Windowing of overlapping data: the signal with zero frequency removed is divided into two channels for windowing, and the difference between t...
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