InterDigital Inc (IDCC)

[Gamco]

United States Patent 7,869,527
Vetter , et al. January 11, 2011
Transceiver with hybrid adaptive self-interference canceller for removing transmitter generated noise to prevent modem jamming

Abstract
A self-interference canceller (SIC) is incorporated into a transceiver to reduce or eliminate modem jamming when a transmitter in the transceiver transmits at high power levels. The SIC is configured to receive at a first input a transmitter noise reference signal including a self-interfering signal component generated by the transmitter, to receive at a second input a corrupted signal including the self-interfering signal component and a desired signal component generated by the transmitter, and to output a correction signal that resembles the self-interfering signal component. The correction signal is subtracted from the corrupted signal to generate a processed signal that is input to the modem. The SIC may be disabled when the output power of the transmitter is at a level below a predetermined threshold. The invention may be applied to a multi-radio access technology (RAT) transceiver.

Inventors: Vetter; Kurt G. (East Quoque, NY), Kazakevich; Leonid (Plainview, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 11/872,101
Filed: October 15, 2007
Related U.S. Patent Documents
Application Number Filing Date Patent Number Issue Date
60829765 Oct., 2006
Current U.S. Class: 375/259
Current International Class: H04L 27/00 (20060101)
Field of Search: 375/219,221,222,278,284,285,295,296,297,316,346,220,259 455/63.1,114.2,278.1,296

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