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Shared signal design method based on LFM signal frequency modulation

A technology of shared signal and frequency modulation, applied in the field of signal processing, can solve the problems of reducing the transmission bit rate, high signal-to-noise ratio requirements, limited number of signals, etc., to improve the transmission bit rate, high demodulation efficiency, and reduce SNR. Effect

Active Publication Date: 2020-07-10
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 the 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 designed 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 frequency modulation
  • Shared signal design method based on LFM signal frequency modulation
  • Shared signal design method based on LFM signal frequency modulation

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Embodiment Construction

[0036] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the implementation and accompanying drawings.

[0037] 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 radar to transmit the shared signal is T r , then the communication transmiss...

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Abstract

The invention discloses a shared signal design method based on LFM signal frequency modulation, and belongs to the field of signal processing. The method comprises: based on random number of (0, 0.5],dividing intervals formed by frequency modulation slopes based on reference LFM signals at equal intervals; and calculating a corresponding frequency modulation parameter to construct a disturbance term of the shared signal, generating the shared signal based on the disturbance term and the reference LFM signal parameter, and if the second design criterion is not met, adjusting the parameter forgenerating the phase disturbance function to redesign until the second design criterion is met. The self-correlation and cross-correlation characteristics of the signal designed by the invention are good, and the demodulation efficiency is high.

Description

[0001] The present invention is a divisional application with the application number "2017108506903" and the title of the invention "a shared signal design method based on LFM signal phase / frequency modulation". technical field [0002] The invention belongs to the field of signal processing, and relates to a design method for probing integrated sharing signals based on frequency modulation of LFM signals. Background technique [0003] 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. [0004] Simultaneous system is one of the main working systems of current detection and communication in...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/58G01S7/28G01S7/40
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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