H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 1/00 (2006.01) H04B 1/10 (2006.01) H04B 1/12 (2006.01) H04B 1/38 (2006.01) H04B 1/40 (2006.01) H04B 1/50 (2006.01) H04B 7/00 (2006.01) H04B 7/005 (2006.01) H04B 7/155 (2006.01) H04B 7/26 (2006.01) H04Q 7/30 (2006.01)
Patent
CA 2267714
A communication system reduces the transmitter overloading of a transmit scanning receiver by reducing transmitter signals transmitted from an overloading transmitter and received by the transmit scanning receiver. A sample of a transmitter signal to be transmitted is obtained from the transmitter before transmission. After the transmitter signal is transmitted and received by the transmit scanning receiver, the sample is used to reduce the transmitter signal at the transmit scanning receiver. To do so, the sample is delayed, adjusted and combined with the transmitter signal. In certain embodiments, a portion of a transmitter signal is obtained from a transmit path of a transmitter prior to transmission and put on a coupled path. The transmitter signal on the coupled path is adjusted and injected into a transmit scanning path of the transmit scanning receiver to combine with a transmitter signal which was transmitted by the transmitter and received at the transmit scanning receiver. A delay element in the coupled path is used to adjust the delay on the coupled path to correspond to the delay experienced by the transmitter signal which was transmitted by the transmitter and then received by the transmit scanning receiver. Amplitude and phase adjusters on the coupled path amplitude and phase adjust the transmitter signal on the coupled path to reduce the transmitter signal on the transmit scanning path. To improve the reduction of the transmitter signal on the transmit scanning path, measurements of at least the transmitter signal on the transmit scanning path can be made, and the measurements can be used to adjust the phase and/or amplitude of the transmitter signals on the coupled path to reduce the level of the transmitter signal on the transmit scanning path. Furthermore, successive cancellation stages comprising parallel coupled paths can be implemented to provide more suppression of the transmitter signal on the transmit scanning path.
Pagano Carmine James II
Rucki John Stanley
Wen Jack Chi-Chieh
Zappala Christopher F.
Kirby Eades Gale Baker
Lucent Technologies Inc.
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