Patent ID: 9748987
Date: 2017-08-29
CPC Classifications: H04B,H04K,H04L

Claim:
1. A method for attempting to cancel interference signal, the method comprising: receiving a first radio frequency (RF) signal corresponding to an interference signal and a second RF signal corresponding to a combined interference and signal of interest (SOI) signal; converting the first RF signal to a first optical signal and the second RF signal to a second optical signal and applying a 180 degree phase shift to one of the first optical signal or the second optical signal before, during, or after optical conversion; optically attenuating and optically time delaying the first optical signal; combining the attenuated and time delayed first optical signal with the second optical signal to create a combined optical signal; converting the combined optical signal to a combined RF signal, wherein at least one optical component is controlled by a digital control component in order to attempt to maximize cancellation of the interference signal from the combined RF signal; and sending the combined RF signal to a radio transceiver.