Fast locking mechanism for channelized ultrawide-band communicat

Details Fast locking mechanism for channelized ultrawide-band communicat Fast locking mechanism for channelized ultrawide-band communicat

1996-12-06

1998-11-03

Ghebretinsae, Temesghen

Pulse or digital communications

Repeaters

Testing

375208, 375355, H04B 169

Patent

active

058320350

ABSTRACT:
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.

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