An ultrawideband (UWB) radar can interfere with external RF sources because of the mutual occupancy of the same frequency band. A stepped-frequency polyphase code (SFPC) waveform is proposed as a generic UWB waveform whose interference with the external RF sources is significantly reduced. The subpulses of the individual stepped-frequency (SF) pulses are phase coded using small phase perturbations. This results in a waveform which places nulls at the frequency locations of the external RF sources. Because the phase perturbations are small, a mismatched filter which uses the unperturbed pulses (no phase modulation) as a reference signal results in a simple receiver design and a small mismatch loss on receive. Furthermore, the proposed methodology also has application to narrowband or wideband radars.
Thinned spectrum ultrawideband waveforms using stepped-frequency polyphase codes
IEEE Transactions on Aerospace and Electronic Systems ; 34 , 4 ; 1356-1361
01.10.1998
553905 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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