Abstract:
A method for detecting a plurality of navigation beacon signals by using either two antennas or a synthetic aperture antenna for receiving a plurality of distinct measurements, and combining the plurality of distinct measurements using a plurality of antenna weight components to form an interference cancellation beam. In one embodiment, the plurality of antenna weight components is determined by eigenvalue processing. In another embodiment, the plurality of antenna weight components is determined by simplified processing. In another aspect, a single antenna is used for receiving an originally received measurement. A copy of the originally received measurement is made and processed to achieve the proper time delay to emulate spatial diversity. The originally received measurement and the processed copy are combined to form an interference cancellation beam.
Abstract:
An apparatus and method for interference cancellation using software or low speed hardware. Antenna signals are received and selected. After selection, interference cancellation processing is applied. In one embodiment, the signal is a spread spectrum signal and selection includes despreading the signal. In one example, the interference cancellation processing includes a phase rotation step and a magnitude manipulation step.