Patent ID: 7933308

Claim:
A signal transmission and reception device, comprising: a transmission unit that converts transmission data spread by spread codes to a Return-to-Zero signal, multiplies a code of an impulse series by the Return-to-Zero signal to convert the Return-to-Zero signal to an impulse radio signal, and transmits the impulse radio signal as a first impulse radio signal via a one-chip transmitter; a reception unit that receives and demodulates a second impulse radio signal via a receiver integrated on the one-chip; a distance measurement unit connected with the transmission unit and the reception unit that measures a distance from the signal transmission and reception device to an object based on a time difference between the first impulse radio signal transmitted by the transmission unit to the object and the second impulse radio signal reflected from the object and received by the reception unit; a first filtering unit disposed in the transmission unit that passes through the first impulse radio signal transmitted by the transmission unit; and a second filtering unit disposed in the reception unit that passes through the second impulse radio signal received by the reception unit, and wherein a pass band of each of the first filtering unit and the second filtering unit is selectable to one of a first pass band in which passing of an Ultra Wide Band impulse radio signal used for data communication is allowed, and a second pass band, different from the first pass band, in which passing of an Ultra Wide Band impulse radio signal used for distance measurement is allowed.