Patent ID: 8614644
Filing Date: 2013-12-24
Classification: G01S,H04B

Abstract:
1. A system for reducing interference received at a victim receiving antenna caused by a main antenna's transmission of a main signal to a target, the interference comprising a sidelobe signal of the main signal, the victim receiving antenna being in a fixed location, the system comprising: an auxiliary antenna co-located with the main antenna, the auxiliary antenna configured to transmit an auxiliary signal toward the victim receiving antenna, the auxiliary signal being coherently related to the main signal; a sensing antenna located on a line-of-sight path between the main antenna and the victim receiving antenna and being remote from the main antenna, the sensing antenna configured to receive the sidelobe signal and the auxiliary signal, and to output a first signal based on the received sidelobe and auxiliary signals; a controller comprising a first input coupled to the sensing antenna and configured to receive the first signal, a second input coupled to the main antenna and configured to receive a second signal comprising an electronic representation of the main signal, and an output coupled to the auxiliary antenna, the controller being configured to cross-correlate the first signal with the second signal and to adjust at least one of an amplitude, a phase, a polarization, and a frequency characteristic of the auxiliary signal via the output based on the cross-correlation so as to at least partially cancel the sidelobe signal received by the sensing antenna.