Weak binary phase shift keying signal blind detection method and device

Abstract

The invention provides a weak binary phase shift keying signal blind detection method and device. The method comprises the following steps: determining a signal frequency band range for weak binary phase shift keying signal blind detection; determining the number n of sub-channels, and configuring a Duffing system corresponding to the sub-channel for each sub-channel; inputting a signal to be subjected to blind detection into each sub-channel, and decomposing the signal to be subjected to blind detection into sub-band signals to be subjected to blind detection through the filter of each sub-channel; performing S transformation on the output of the Duffing system corresponding to each sub-channel to obtain the output envelope of the Duffing system of each sub-channel; and detecting whetherthe output of the Duffing system corresponding to each sub-channel has an intermittent chaotic state or not to judge whether a weak binary phase shift key control signal exists or not. According to the scheme of the invention, the blind detection difficulty of weak binary phase shift keying signals is reduced.

Description

technical field [0001] The invention relates to the field of signal detection, in particular to a method and device for blind detection of weak binary phase shift keying (BPSK) signals. Background technique [0002] Binary Phase Shift Keying (BPSK) signals have high frequency band utilization and strong anti-noise ability, and are widely used in many fields such as military and civilian. For third-party blind reconnaissance, weak binary phase-shift keying signals are often received. Therefore, the blind detection of weak binary phase-shift keying signals has always been the key research content of radio monitoring and communication reconnaissance. Especially under the condition that the signal-to-noise ratio is lower than -10dB, the problem of blind detection of the weak binary phase-shift keying signal is relatively difficult. [0003] The prior art "Research on Blind Detection of Weak BPSK Signal Using Duffing Oscillator and S-Transform" discloses a method for blind detec...

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Problems solved by technology

[0006] In order to solve the above-mentioned technical problems, the present invention proposes a method and device for blind detection of weak binary phase-shift keying signals. The method and device are used to solve the difficulty of blind detection of weak binary phase-shift keying signals in the prior art big technical problem

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