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

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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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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