Adaptive noise reduction system for a wireless receiver

Details Adaptive noise reduction system for a wireless receiver Adaptive noise reduction system for a wireless receiver

2005-11-22

2005-11-22

Nguyen, Duc M. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

C455S303000, C455S304000, C455S312000, C455S278100, C455S063100

Reexamination Certificate

active

06968171

ABSTRACT:
A receiver with reduced near field noise is described. The receiver has a far range receiving section configured to sense a desired signal that includes near field noise. The receiver further includes a near range receiving section configured to sense a near field noise reference signal. An adaptive noise canceller (ANC) of the receiver is configured to detect the magnitude of an error vector from the far range receiving section. The ANC is configured to adjust the phase and gain of the near field noise reference signal in response to the magnitude of the error. Accordingly, the ANC can generate a corrected near field noise reference signal that is added to the desired signal with an adder. The near field noise is canceled by the addition of the corrected near field noise signal. The ANC uses a least mean square technique to determine the amount of correction needed.

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