Patent ID: 8159390

Claim:
A temporal nuller for removing or minimizing narrow band interference/jamming power from a global positioning system (GPS) receiver's input, comprising: a first signal path including a first input node and a first output node; at least one time delay device located within the first signal path, said at least one time delay device operative to introduce a time delay between a signal at an output of the at least one time delay device relative to a signal at an input of the at least one time delay device; a second signal path including a second input node and a second output node, wherein the first signal input node is connected to the second signal input node, and the first signal output node is connected to the second signal output node, and an attenuator located in the second signal path, said attenuator operative to attenuate a signal in the second signal path, wherein the at least one time delay device includes a first time delay device and a second time delay device, the temporal nuller further comprising a switch operatively coupled to the first and second time delay devices, said switch operative to connect either the first or second time delay device in the first signal path.