Patent ID: 7564400
Filing Date: 2009-07-21
Classification: G01S,H04B

Abstract:
1. A spread spectrum radar apparatus which detects an object by transmitting and receiving a spread signal obtained by spectrum-spreading, said spread spectrum radar apparatus comprising: an oscillating unit configured to generate a carrier wave; a code reversal unit configured to output a second pseudo noise code that has a cyclically reversed logical value of a first pseudo noise code; a transmission unit configured to transmit a spread signal which is the carrier wave that has been spread using one of the first pseudo noise code and the second pseudo noise code; an intermediate demodulated signal generating unit configured to receive a reflected wave which is the spread signal reflected from the object after the spread signal is transmitted by said transmission unit, and to despread the reflected wave using a code which is delayed code of the other one of the first pseudo noise code and the second pseudo noise code, to generate an intermediate demodulated signal; a filter through which a specific frequency component of the intermediate demodulated signal passes; and a sampling unit configured to sample an output signal from said filter, wherein said sampling unit is configured to sample the output signal in synchronization with the cycle of the reversal.