Patent ID: 6711204
Filing Date: 2004-03-23
Classification: H04B

Abstract:
An improvement to a spread-spectrum system having a base station and a plurality of remote stations (RS), with said base station (BS) for transmitting a plurality of BS-spread-spectrum signals at a first frequency and for receiving, at a second frequency, a plurality of RS-spread-spectrum signals transmitted from said plurality of remote stations, respectively, the improvement comprising:said base station for transmitting a BS-channel-sounding signal at the second frequency; said plurality of remote stations for receiving the BS-channel-sounding signal at the second frequency, with said base station for transmitting the plurality of BS-spread-spectrum signals at the first frequency outside a correlation bandwidth of the plurality of RS-spread-spectrum signals transmitted by the plurality of remote stations at the second frequency; and said plurality of remote stations, responsive to the BS-channel-sounding signal, for compensating to the second frequency the respective plurality of RS-spread-spectrum signals.