Continuous Coded Waveforms for Noise Radar

Continuous Coded Waveforms for Noise Radar

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This chapter describes a new class of continuous waveforms for noise radar that can be processed using earlier developed methods for reducing pulse compression sidelobes and equalizing compressed pulses before Doppler filtering. The purpose is to find non-repeating waveforms that are amenable to the proposed processing methods with sufficiently low processing loss. The proposed waveforms are based on codes that modulate sub-pulses which define the bandwidth of the waveform. For constant amplitude waveforms the codes are phase codes and the sub-pulses can consist of rectangular pulses with constant phase or linear phase. The proposed waveforms use many short codes to produce a code with a length that is the product of the shorter code lengths. The resulting long code can be arbitrarily long by introducing new shorter codes iteratively. The code construction is equivalent to many Kronecker products of the shorter code vectors. The codes can be random or deterministic to get a quasi-periodic yet unpredictable waveform.

Inspec keywords: pulse compression; radar signal processing; phase coding

Other keywords: Kronecker products; constant phase; code construction; Doppler filtering; rectangular pulses; nonrepeating waveforms; noise radar; compressed pulse equalization; constant amplitude waveforms; quasiperiodic waveform; pulse compression sidelobe reduction; continuous coded waveforms; code vectors; phase codes; linear phase; subpulse modulation

Subjects: Radar equipment, systems and applications; Signal processing and detection; Codes

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