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DS/FH frequency-hopping spectrum-spreading data transmission signal capturing method based on long code phase assistance

A phase assist and signal capture technology, applied in transmission systems, electrical components, etc., can solve problems such as high cost and low efficiency, achieve strong anti-interference ability, improve capture speed, and achieve flexible effects

Active Publication Date: 2019-11-19
HEFEI INNOVATION RES INST BEIHANG UNIV
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Problems solved by technology

[0004] A DS / FH jump-spread digital transmission signal acquisition method based on long code code phase assistance proposed by the present invention can solve the technical problems of high cost and low efficiency of the existing method for maintaining system synchronization in a DS / FH jump-spread hybrid system

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  • DS/FH frequency-hopping spectrum-spreading data transmission signal capturing method based on long code phase assistance
  • DS/FH frequency-hopping spectrum-spreading data transmission signal capturing method based on long code phase assistance
  • DS/FH frequency-hopping spectrum-spreading data transmission signal capturing method based on long code phase assistance

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Embodiment Construction

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments.

[0028] Such as figure 1 As shown, the DS / FH hop-spread digital transmission signal acquisition method based on long code phase assistance described in this embodiment includes:

[0029] S100. Carrier stripping is performed on the signal at the set frequency hopping frequency point;

[0030] S200. Calculate the code phase offset and Doppler offset of the signal at the current frequency hopping frequency point;

[0031] S300, synchronization of frequency hopping patterns;

[0032] S400. Calculate the Doppler shift of the signal at all frequency hop...

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Abstract

The invention discloses a DS / FH frequency-hopping spectrum-spreading data transmission signal capturing method based on long code phase assistance, capable of solving the technical problems of relatively high cost and low efficiency of an existing method for keeping system synchronization for a DS / FH frequency-hopping spectrum-spreading hybrid system. Based on a local oscillator, the following steps are implemented: S100, carrying out carrier stripping on a signal at a set frequency hopping frequency point; S200, calculating code phase shift and Doppler shift of the signal at the current frequency hopping frequency point based on the step S100; S300, realizing synchronization of frequency hopping patterns based on the step S200; and S400, calculating Doppler shift of the signal at all frequency hopping points. According to the DS / FH frequency-hopping spectrum-spreading data transmission signal capturing method, the problem that receivers cannot be synchronized due to inconsistent Doppler shift of different frequency hopping points is solved; the DS / FH frequency-hopping spectrum-spreading data transmission signals based on long code phase assistance are captured, and the complexityis low, and implementation is flexible. The DS / FH frequency-hopping spectrum-spreading data transmission signal capturing method can effectively reduce the calculation amount and average capture time,improves the capture speed, can be used for capturing spectrum-spreading signals, and is higher in anti-interference capability.

Description

technical field [0001] The invention relates to the technical field of signal reception, in particular to a DS / FH jump-spread digital transmission signal acquisition method based on long code phase assistance. Background technique [0002] Hybrid spread spectrum communication systems have received more and more attention in the past ten years. Among them, DS (Direct Sequence) FH (Frequency Hopping) hybrid system adds the function of carrier hopping on the basis of Direct Sequence Spread Spectrum (DNSS) Combine. The hybrid spread spectrum communication system after synthesis has the advantages of anti-far-near effect and anti-multipath interference, relatively simple structure and high processing gain, etc., and has been widely used in the field of communication. [0003] The key to the efficient and stable operation of the DS / FH hybrid system is the high efficiency of the system's capture, that is, system synchronization. System synchronization refers to keeping the carri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/692H04B1/7075H04B1/7156
CPCH04B1/692H04B1/7075H04B1/7156H04B2001/71563
Inventor 赵洪博贺治钧庄忱王清孙超张文峰刘浩强冯文全
Owner HEFEI INNOVATION RES INST BEIHANG UNIV
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