Selection of filter coefficients for tranceiver...

Details Selection of filter coefficients for tranceiver... Selection of filter coefficients for tranceiver...

2011-06-07

2011-06-07

Vo, Don N (Department: 2611)

Pulse or digital communications

Transceivers

C375S232000

Reexamination Certificate

active

07957456

ABSTRACT:
Embodiments of a method and apparatus for selecting coefficients of a non-linear filter are disclosed. The non-linear filter receives a transmit signal and generates a non-linear replica signal of a transmit DAC of a transceiver. The method include applying a plurality of periodic test pattern signals to inputs of the transmit DAC, wherein the periodic test pattern signals include a stream of symbols. Receive symbols are collected at an output of a receiver ADC of the transceiver resulting from the plurality of periodic test pattern signals. A non-linear map is generated that provides a value for each of n consecutive symbols input to the transmit DAC. Coefficients of the non-linear filter are selected based on the non-linear map.

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International Search Report, International Application No. PCT/US2008/057215, Selection of Filter Coeficients for Transceiver Non-Linearity Signal Cancellation.

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