A receiver for acquisition and lock of an impulse radio signal comprising
an adjustable time base to output a sliding periodic timing signal having
an adjustable repetition rate, and a decode timing modulator to output a
decode signal in response to the periodic timing signal. The impulse
radio signal is cross correlated with the decode signal to output a
baseband signal. The receiver integrates T samples of the baseband signal
and a threshold detector uses the integration results to detect channel
coincidence. A receiver controller stops sliding the time base when
channel coincidence is detected. A counter and extra count logic, coupled
to the controller, are configured to increment or decrement the address
counter by a one or more extra counts after each T pulses is reached in
order to shift the PN code modulo for proper phase alignment of the
periodic timing signal and the received impulse radio signal.