Research of the possibility of increasing the uniqueness of determining the time delay of the phase-code shift keyed signal in a correlation meter on the basis of FPGA

Research of the possibility of increasing the uniqueness of determining the time delay of the phase-code shift keyed signal in a correlation meter on the basis of FPGA

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Background.In radar systems, phase code-domain keying signals are widely used.Continuous signals of this kind have the advantage of low side lobes of the cross-correlation function and high noise immunity, but have limitations on the size of the area of view INFANT / TODDLER BODYSUIT associated with the presence of ambiguity peaks.Aim.The paper considers the possibility of increasing the unambiguity of determining the time delay of the phase-code shift keyed signal in a correlation meter based on a combined FPGA-based coding rule.

Methods.To achieve this goal, a numerical simulation of a correlation time delay meter with modulating signals formed by different coding rules was performed.Results.It is proposed in the correlation meter with continuous reception of the phase-code shift keyed signal to improve the accuracy of measuring the time delay and the unambiguity of determining the location of remote objects, as a modulating signal, use a signal formed by two pseudo-random sequences that are the same according to the coding rule, but different in duration.The results of numerical simulation of the post-detection digital processing system based on the proposed method are presented.

Conclusion.The application of the Screen Hardware proposed coding rule makes it possible to implement a correlation meter with a minimum amount of computing resources while increasing the unambiguity and expanding the range of measured time delays.