Patent ID: 6492904
Filing Date: 2002-12-10
Classification: G01S,G06K,G06Q,H04B

Abstract:
A method of impulse radio duty cycle variation and synchronization for an impulse radio system, comprising:synchronizing an internal clock means associated with a carrier wave-less impulse radio transmitter to a timing means; synchronizing an internal clock means associated with a carrier wave-less impulse radio receiver to a timing means corresponding to said timing means used to synchronize said carrier wave-less impulse radio transmitter; transmitting carrier wave-less impulse radio transmissions at predetermined times, each of said carrier wave-less impulse radio transmissions including a train of time-spaced pulses and said predetermined transmission times being determined by said internal clock associated with said carrier wave-less impulse radio transmitter; and listening by said carrier wave-less impulse radio receiver for said carrier wave-less impulse radio transmissions at predetermined intervals surrounding said predetermined transmission times of said carrier wave-less impulse radio transmitter, said listening step further includes locking onto one of said carrier wave-less impulse radio transmissions during each of said predetermined intervals by adjusting the timing of a train of template signal pulses generated by the carrier wave-less impulse radio receiver such that said timing of the train of template signal pulses is substantially coincident with the timing of the train of time-spaced pulses of the received carrier wave-less impulse radio transmission.