Patent ID: 6011952
Filing Date: 2000-01-04
Classification: H04B

Abstract:
A method for relayed electromagnetic communication networking among a plurality of signalling devices through a relay station comprising the steps of:generating at each said signalling device a source signal segment;storing said source signal segment as a stored segment at a first one of said signalling devices, said first one including signal estimating and signal cancelling facilities;estimating channel characteristics of a roundtrip path to said relay station to obtain compensation parameters for said first one of said signalling devices;transmitting said source signal segment from each one of said signalling devices to said relay station;receiving at each one of said signalling devices a composite signal segment from said relay station, said composite signal segment containing a representation of said source signal from each said device;modifying said stored segment at said first one of said signalling devices using said compensation parameters to obtain a cancellation signal for said first one of said signalling devices; andsubtracting at said first one of said signalling devices said cancellation signal from said composite signal segment to recover desired signals, said desired signals being representations of source signal segments from the other devices.