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Frequency capture method suitable for continuous phase modulation signal

A phase modulated signal and frequency capture technology, applied in the field of frequency capture, to achieve the effects of wide capture range, improved frequency resolution, and increased signal-to-noise ratio

Pending Publication Date: 2022-04-12
北京融为科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] For this reason, the purpose of the present invention is to propose a kind of frequency acquisition method that is applicable to continuous phase modulation signal, to solve the problem mentioned in the background technology, overcome the deficiency that exists in the prior art

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  • Frequency capture method suitable for continuous phase modulation signal
  • Frequency capture method suitable for continuous phase modulation signal
  • Frequency capture method suitable for continuous phase modulation signal

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Embodiment Construction

[0045]Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote 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 and are intended to explain the present invention and should not be construed as limiting the present invention.

[0046] The invention relates to a Doppler frequency acquisition method in the receiving process of wireless communication signals, which is suitable for the frequency acquisition of general wireless communication signals, and is especially suitable for the frequency acquisition of signals with high acquisition difficulty such as continuous phase modulation.

[0047] The frequency acquisition method applicable to the continuous phase modulation signal of the present invention first integrates and reduces the speed of the ...

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Abstract

The invention provides a frequency capturing method suitable for a continuous phase modulation signal, which comprises the following steps of: S1, performing integral speed reduction on a received signal, and then performing segmented windowing processing and segmented FFT (Fast Fourier Transform) operation to obtain a frequency domain signal; s2, carrying out incoherent accumulation on the frequency domain signals, and then carrying out spectrum matching shift accumulation according to the signal spectrum bandwidth to obtain a matching cyclic accumulation spectrum; s3, detecting the peak value of the matching cyclic accumulation spectrum, and calculating a Doppler frequency deviation value; and S4, repeating the steps S1 to S3 to obtain a plurality of groups of Doppler frequency deviation values, and calculating an average value as a frequency capture value.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a frequency acquisition method suitable for continuous phase modulation signals. Background technique [0002] In a wireless communication system, due to the relative movement of the receiving and transmitting ends, the frequency of the received signal will change, that is, the Doppler frequency shift. In the coherent demodulation system, it is necessary to use the carrier phase synchronization technology to realize the carrier phase stripping of the sending and receiving signals. However, in most application scenarios, such as satellite wireless communication, the satellite moves fast, and there is a large Doppler frequency shift in the received signal, which is far beyond the locking range of carrier phase synchronization technology. Doppler frequency shift is required first. After the capture of the received signal, the frequency offset of the received signal i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/00H04L27/26
Inventor 潘云强徐杰
Owner 北京融为科技有限公司
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