While a number of signal structures have been proposed for radar, frequency modulation (FM) remains the most common in practice because it is well-suited to high-power transmitters, which tend to introduce significant distortion to other waveform classes. That said, various forms of coding provide useful parameterizations for which a variety of optimization methods can be readily applied to accomplish different operational goals. To that end, the polyphase-coded FM (PCFM) implementation was previously devised as a means to bridge this gap between optimizable parameters and physically realizable waveforms. However, the original method employed to optimize PCFM waveforms involved a piecewise greedy search that, while relatively effective, was rather slow and cumbersome. Here, the continuous nature of this framework is leveraged to formulate a gradient-based optimization approach that updates all parameters simultaneously and can be efficiently performed using fast Fourier transforms, thus facilitating a general design methodology for practical waveforms that is directly extensible to myriad waveform-diverse arrangements. Results include a large number of optimization assessments to discern performance trends in aggregate and detailed analysis of specific cases, as well as both loopback and free-space experimental measurements to demonstrate practical efficacy.


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    Title :

    Gradient-Based Optimization of PCFM Radar Waveforms




    Publication date :

    2021-04-01


    Size :

    6773519 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Polyphase-coded FM (PCFM) radar waveforms, part I: implementation

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    Reciprocal radar waveforms

    Gerlach, K. / Kretschmer, F.F. | IEEE | 1991


    Radar and waveforms

    Emerald Group Publishing | 2002


    Polyphase-coded FM (PCFM) radar waveforms, part II: optimization

    Blunt, Shannon / Jakabosky, John / Cook, Matthew et al. | IEEE | 2014


    Phase-coded waveforms for radar

    Davis, R.M. / Fante, R.L. / Perry, R.P. | IEEE | 2007