Estimating power amplifier non-linearity in accordance with memory depth
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United States of America Patent
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Dec 19, 2006
Grant Date -
Jan 19, 2006
app pub date -
Jul 14, 2004
filing date -
Jul 14, 2004
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Abstract
Reducing a non-linearity effect of a power amplifier includes receiving signals at off-line inverse and forward models. The signals include an input signal, a pre-distorted signal, and an output signal. The output signal exhibits distortion with respect to the input signal, where the distortion includes an impairment effect and a non-linearity effect. The impairment effect is reduced in accordance with the signals. A memory depth of the power amplifier is estimated in accordance with the signals to generate memory information. Non-linearity of the power amplifier is estimated in accordance with the memory information. Pre-distortion information is calculated according to the estimated non-linearity. The non-linearity effect is reduced using the pre-distortion information.
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