Method and apparatus for selectively applying interference cancellation in spread spectrum systems

摘要

The present invention is directed to the selective provision of interference canceled signal streams to demodulating fingers in a communication receiver. According to the present invention, potential interferer signal paths are identified. Signal streams having one or more potential interferer signals removed or canceled are created, and a correlation is performed to determine whether the strength of a desired signal path increased as a result. If the correlation indicates that the strength of a desired signal path was increased by the signal cancellation, the interference canceled signal stream is provided to the demodulation finger assigned to track the desired signal path. If the correlation determines that the strength of the desired signal path did not increase as a result of performing interference cancellation, the raw or a different interference canceled signal stream is provided to the demodulation finger.

主权项

1. An apparatus comprising:
a plurality of demodulation fingers, wherein each of the plurality of demodulation fingers includes an input; and a cancellation controller configured to selectively provide:
in a first mode, an interference-cancelled signal stream to the inputs of the plurality of demodulation fingers; andin a second mode, a non-interference-cancelled signal stream to the inputs of the plurality of demodulation fingers.