Radar pulse compression is a prevalent radar technique that increases the bandwidth of a coherent radar pulse by intrapulse frequency modulation or phase coding. A matched filter (MF), used on receive, causes a long weak pulse to exhibit delay properties of a narrow strong pulse. Longer mismatched filters (MMF) are often used to lower the sidelobes of the delay response, with a penalty of a small loss in the signal-to-noise ratio. This article reviews techniques that extend this important concept to noncoherent sensors whose only emitted coding option is on–off (e.g., direct detection LIDAR). It shows that processing by a mismatched filter is obligatory rather than optional. It discusses merit measures and presents search results of medium-length, good, on–off sequences. The article covers also periodic on–off sequences, corresponding to continuous wave radar. Here the on receive MMF is replaced by a same period-length, real-valued, reference sequence, exhibiting perfect (sidelobe-free) periodic cross-correlation, with the emitted on–off periodic sequence. Detection in the presence of noise is demonstrated through Monte-Carlo simulations.


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    Titel :

    Waveforms Search for Noncoherent Pulse Compression


    Beteiligte:
    Levanon, Nadav (Autor:in) / Cohen, Itzik (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    01.04.2024


    Format / Umfang :

    1197979 byte




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch