Doppler-improved polyphase pulse expander-compressor

Details Doppler-improved polyphase pulse expander-compressor Doppler-improved polyphase pulse expander-compressor

1986-04-07

1988-03-29

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

For frequency modulation

G01S 1328

Patent

active

047346990

ABSTRACT:
A method and apparatus for reducing cyclic losses due to doppler shifting frequency-derived phase coded expanded radar pulses using new expanded pulse codes which increase the number of phase elements without increasing compression ratios. These new expanded codes may be generated by sampling the phase characteristics of a chirp or step-chirp waveform above the Nyquist rate to derive the phases of the new coded waveforms and compressing the new expanded pulses with a compression ratio equal to the reciprocal of the signal bandwidth.

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