| 摘要 |
<p>PURPOSE:To eliminate influence of radio interference due to a signal transmitted from an apparatus placed in the other vehicle. CONSTITUTION:An identification code(ID) inherent for an own vehicle is generated from an identification code generator 12. A logic calculator 13 executes a logic operation using the ID at a transmission pseudo-noise(PN) generated from a PN generator 11. An executed result is used for a phase modulation of the transmitted signal in a transmitter 14. In the case of reception, an ID output of outputs of a demodulator 32 is compared with an ID output of the generator 12. When both are not coincident as a result of its comparison, it is regarded as being radio interference to stop outputting of a distance, etc.</p> |
