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Shared signal design method based on LFM signal phase/modulation frequency modulation

A technology of sharing signals and design methods, applied in the field of signal processing, can solve the problems of reducing the transmission bit rate, high signal-to-noise ratio requirements, and limited number of signals, etc., to improve the transmission bit rate, high demodulation efficiency, and reduce SNR. ) the effect of the requirement

Active Publication Date: 2018-02-23
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

This method only involves fractional Fourier transform in the communication receiver, and there is no energy accumulation process similar to pulse compression technology, so the signal-to-noise ratio of the signal is high; in addition, due to the limitation of the bandwidth of the radar receiver, the design The number of signals is very limited, which reduces its transmission bit rate

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  • Shared signal design method based on LFM signal phase/modulation frequency modulation
  • Shared signal design method based on LFM signal phase/modulation frequency modulation
  • Shared signal design method based on LFM signal phase/modulation frequency modulation

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[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the implementation methods and accompanying drawings.

[0036] see figure 1 , the overall workflow of sounding integration is as follows: firstly, a shared signal library is established, which contains M=2 P different shared signals, each shared signal s m (t), m=1,..., M is correspondingly mapped to a binary information with a length of P, so as to realize the modulation of communication information; at the radar transmitting end, firstly, the data string to be transmitted is divided into a group of P binary symbols Carry out group truncation, and then select the corresponding emission signal s in the signal library according to each group of data m (t) and emit. Among them, if the pulse repetition interval PRT of the shared signal transmitted by the radar is T r, then the communication...

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Abstract

The invention discloses a shared signal design method based on LFM signal phase / modulation frequency modulation. According to the phase modulation shared signal design method, a phase perturbation function is acquired based on randomly set amplitude parameters and phase parameters, and then the perturbation term of a shared signal is constructed; a shared signal is generated based on the perturbation term and a reference LFM signal parameter; and if a first design criterion is not satisfied, parameters for generating the phase perturbation function are adjusted for redesign until the first design criterion is satisfied. According to the modulation frequency modulation shared signal design method, based on a random number between (0, 0.5), an interval based on the frequency modulation slopeof a reference LFM signal is equally spaced; corresponding modulation frequency modulation parameters are calculated to construct the perturbation term of the shared signal; the shared signal is generated based on the perturbation term and the reference LFM signal parameter; if a second design criterion is not satisfied, parameters for generating the phase perturbation function are adjusted for redesign until the second design criterion is satisfied. The signal designed according to the invention has the advantages of good autocorrelation and cross-correlation characteristics and high demodulation efficiency.

Description

technical field [0001] The invention belongs to the field of signal processing, and relates to a design method for probing integrated sharing signals based on LFM signal phase / frequency modulation. Background technique [0002] The integration of detection and communication refers to the simultaneous realization of the functions of radar detection and data communication by sharing hardware or software resources such as signals, channels, and antennas. Compared with the traditional function superposition system, it has the advantages of resource intensification and functional complementarity. It has become a research hotspot in the field of electronic information. [0003] Simultaneous system is one of the main working systems of the current detection and communication integration. It realizes radar detection and data communication at the same time by transmitting shared signals. The key to this technology lies in the design of shared transmitting signals and processing of re...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/02
CPCG01S13/582G01S7/28G01S7/40Y02D30/70
Inventor 崔国龙付月熊丁丁李洋漾易伟张天贤孔令讲杨晓波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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