Patent ID: 7336693

Claim:
A transmitter for carrying out communications using ultra wideband signals, comprising: a synthesizer generating an oscillating signal of a frequency T, where T is a number; a divider generating a clock signal of a frequency T/n by receiving and dividing the oscillating signal; a spreading code generator generating a spreading code sequence signal using the clock signal; a first multiplier generating a spread spectrum signal by receiving a baseband signal and the spreading code sequence signal, and multiplying the baseband signal by the spreading code sequence signal; and a second multiplier generating a frequency converting signal by receiving one of the spread spectrum signal and the oscillating signal and a carrier wave signal of a frequency T/m, and by multiplying the spread spectrum signal by one of the oscillating signal or the carrier wave signal, the carrier wave signal being obtained by dividing the oscillating signal, in which n is a first integer and m is a second integer, the frequency T/m is between 1 GHz and 10 GHz, and the number n/m is a positive rational number which is less than or equal to 10.