Method and apparatus for reducing digital to analog conversion (DAC) bits in frequency division multiple access (FDMA) system
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United States of America Patent
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Jul 23, 2013
Grant Date -
Jun 18, 2009
app pub date -
Dec 18, 2008
filing date -
Dec 18, 2007
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Abstract
A method and an apparatus for reducing Digital-to-Analog Conversion (DAC) bits at a transmitter of a Frequency Division Multiple Access (FDMA) system reduces a number of the bits for conversion so as to save power and reduce the cost of operation. The method can include generating a digital signal gain control value and an analog signal gain control value using subcarrier allocation information, a required Signal to Noise Ratio (SNR), and a Peak to Average Power Ratio (PAPR); controlling a gain of a signal input to a digital-to-analog converter using the digital signal gain control value; converting a digital signal of the controlled gain to an analog signal using the digital-to-analog converter; and restoring an original signal by controlling a gain of a signal output from the digital-to-analog converter using the analog signal gain control value.
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