Phase encoding radar signal element width resolving method and system

Abstract

The invention provides a phase encoding radar signal element width resolving method and system, and relates to the technical field of electromagnetic environment signal monitoring, and the system employs the resolving method, and the method comprises the steps: extracting phase difference data of an inputted sampling sample, carrying out the statistics of the information of abrupt change points, and carrying out the statistics of the minimum value of the distance between the abrupt change points, wherein the code element width information is used as code element width information of the phasecoded signal; verifying whether the initial code element width information is true and valid or not according to the code element characteristics, and if so, taking the initial code element width information as a true code element width; and if not, sequentially taking 1 / 2 and 1 / 3 of the minimum value of the distance and the maximum common divisor of the minimum value and the second minimum valueas the code element width, and verifying again by using the method until the effective code element width is detected. The method can adapt to any random coding sequence of the phase-coded radar signal, and can correctly and effectively estimate the code element width of the phase-coded signal especially when all sub-pulse phases are the same as the adjacent sub-pulse phases.

Description

technical field [0001] The invention relates to the technical field of electromagnetic environment signal monitoring, in particular to a method and system for calculating the symbol width of a phase-coded radar signal. Background technique [0002] Phase encoding signal is a kind of radar pulse intrapulse modulation signal, which is widely used in pulse pressure radar system. Correspondingly, the identification of phase encoding signal and the extraction of characteristic parameters have become a very important part of electronic reconnaissance system. The phase encoding signals in radar signals mainly include two-phase encoding signals and four-phase encoding signals. Commonly used code types include m-sequence codes, Barker codes, random sequence codes, and Taylor codes. It is an important content of electronic reconnaissance to quickly and accurately obtain the characteristic parameters such as the type of phase-encoded signal, the symbol width, the number of symbols, and...

AI Technical Summary

Problems solved by technology

In fact, the inter-pulse encoding sequence of phase-encoded radar signal pulses is random. When the encoding sequence does not meet the above conditions, for example, the figure 2 , attached image 3 And attached Figure 4 In , there is no single sub-pulse that is out of phase with its adjacent sub-pulses, so this estimation method is inaccurate

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