| 摘要 |
PURPOSE:To provide a moving object identifying device for which the influence of noise from periphery and interference by plural adjacent interrogators are eliminated. CONSTITUTION:In the moving object identifying device provided with an interrogation wave generator 11 for generating interrogation waves by the interrogator 1 provided with the interrogator 1 for emitting the interrogation waves and a responder 2 for modulating the received interrogation waves corresponding to identification codes and reemitting them as response waves, its emitting means, a mixer 14 for mixing the received response waves and the output of the interrogation wave generator 11 and a demodulation means 15 for reading the identification codes included in the response waves from the output of the mixer 14, the interrogation wave generator 11 is constituted of an oscillator 111, a spreading code generator 112 for generating pseudo noise system codes as spreading codes and the mixer 113 for mixing oscillator output and spreading code generator output. Also, the demodulation means 15 is provided with a band-pass filter 151 for passing only the frequency components of the response waves. |
