Noncoherent differential phase shift keying (DPSK) communication signal chaotic oscillator detector and construction method

Abstract

The invention provides a detector for detecting a noncoherent differential phase shift keying (DPSK) communication signal by a chaotic oscillator and a construction method. In the construction method, M phase diversity channels are formed by the common-frequency Duffing oscillator and circular domain dividers, correspond to array elements of the common-frequency Duffing oscillator respectively, and are used for detecting the noncoherent DPSK communication signal, and a dominant array element channel comprising the most baseband data information is screened and gated by utilizing equal weight data fusion, correlation integration and correlation peak searching technologies, so the aim of detecting the baseband data information in real time from the noncoherent DPSK communication signal is fulfilled. The detector and the construction method are particularly applied to noncoherent DPSK communication signal detection occasions. By the detector and the construction method, array element output presenting a chaotic track pattern can be deleted from a converted one-dimensional time signal, namely the array element output not presenting a periodical track pattern is forbidden to take part in data fusion, the noncoherent DPSK communication signal detection performance of the common-frequency chaotic oscillator can be improved, and engineering practicability is ensured.

Description

technical field [0001] The invention relates to a non-coherent signal chaotic oscillator detector and a construction method. In particular, it relates to a chaotic oscillator detector for non-coherent DPSK communication signals and a construction method. Background technique [0002] The patent document with the patent application number 200810209736.4 discloses a "same-frequency Duffing oscillator and construction method without sensitivity to the phase of the signal to be detected", in which the same-frequency Duffing oscillator provides universality for detecting incoherent signals with chaotic oscillators Methods and techniques, which make the idea of ​​detecting incoherent signals with chaotic methods become a reality. However, it should be noted that this document only answers and solves the problem of whether the incoherent signal can be detected by the chaotic method, and does not provide a specific solution for the real-time detection of the incoherent DPSK communi...

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Problems solved by technology

However, since each element of the chaotic oscillator with the same frequency cannot present a periodic trajectory pattern at the same time for the DPSK signal to be detected, the converted one-dimensional time signal contains the adverse effects of the elements presenting a chaotic trajectory pattern (equivalent to an interference signal), so , data fusion in an equally weighted form does not guarantee the best performance for an incoherent DPSK signal detector

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