Patent ID: 7366235

Claim:
A Ultra Wideband demodulating apparatus comprising: a first delayed-detecting section for outputting a first detection signal, according to a correlation between a reception signal PPM (pulse position modulation) at a pulse interval of T and a pulse variation width of τ and the reception signal delayed with a time (T+τ); a second delayed-detecting section for outputting a second detection signal, according to a correlation between the reception signal and the reception signal delayed with a time (T); a third delayed-detecting section for outputting a third detection signal, according to a correlation between the reception signal and the reception signal delayed with a time (T−τ); a demodulating section for generating a demodulated signal by use of the first, second and third detection signals; and a synchronism detecting section for detecting an error of delay time T from the first, second and third detection signals, generating a correcting signal representative of a direction to correct the delay time T, and outputting the correcting signal to the first, second and third delayed-detecting sections, wherein the first, second and third delayed-detecting sections correct the delay time T by use of the correcting signal thereby restoring a synchronism.