Patent ID: 6381261
Filing Date: 2002-04-30
Classification: G01S

Abstract:
A random pulse type radar apparatus comprising:a transmitter for generating a hybrid type spectrum spread signal by simultaneously using two kinds of modulations which are phase shift keying (PSK) modulation for selecting a phase of a transmission radio wave in accordance with a pseudo noise digital code and outputting said transmission wave, and time hopping modulation for stopping transmission of a radio wave at random in accordance with said pseudo noise digital code; a receiving unit for selectively detecting an echo of a transmission signal radio wave, generated by said transmitter, from a target with a time delay; at least one a common antenna unit for use both for transmission and reception or antenna units installed close to each other and respectively serving single functional units; and a reception control unit for stopping an action of said receiving unit in a time zone in which said transmitter is outputting radio waves in accordance with said time hopping modulation, whereby a spatial distribution of an intensity of an echo of a transmitted radio wave is measured through computation of a cross-correlation function of a transmission signal and a reception signal.