US Patent No. 9,831,901

REMOTE INTERFERENCE CANCELLATION FOR COMMUNICATIONS SYSTEMS


Patent No. 9,831,901
Issue Date November 28, 2017
Title Remote Interference Cancellation For Communications Systems
Inventorship Elias Bonaventure Kpodzo, Franklin Park, NJ (US)
Robert Holland, Moorestown, NJ (US)
Paul Dourbal, Princeton Junction, NJ (US)
Yanhua Deng, Gainesville, FL (US)
Paul Prucnal, Princeton, NJ (US)
Andrew McCandless, Baton Rouge, LA (US)
Assignee L3 TECHNOLOGIES, INC., New York, NY (US)

Claim of US Patent No. 9,831,901

1. An interference cancellation system (ICS) comprising:
an interference estimation processor configured to generate an estimated interference signal using a spatial diversity interference
estimation technique based on one or more signals received over the air via an antenna array, wherein the spatial diversity
interference estimation technique comprises an independent component analysis of interference signal components received via
the antenna array, and the independent component analysis comprises a second order decorrelation of the interference signal
components received via the antenna array; and

an interference cancellation processor configured to:
receive the estimated interference signal and a combined signal, wherein the combined signal comprises a combination of the
interference signal and a signal of interest (SOI),

convert the estimated interference signal and the combined signal to optical signals,
apply a 180 degree phase shift to one of the estimated interference signal or the combined signal,
variably attenuate and variably time delay one or more of the estimated interference signal or the combined signal,
combine the estimated interference signal and the combined signal, and
convert the combination of the estimated interference signal and the combined signal into a radio frequency (RF) signal.