METHOD AND SYSTEM FOR OPTICAL ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING WITH HADAMARD TRANSFORM COMBINED WITH COMPANDING TRANSFORM
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United States of America Patent
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Issued Date -
Jul 12, 2012
app pub date -
Dec 29, 2011
filing date -
Jan 10, 2011
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Abandoned
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Abstract
A combined Hadamard and companding transform technique is incorporated into orthogonal frequency division multiplexed signals to reduce the peak-to-average ratio of signals. A Hadamard transform is applied to the signals to generate a first transformed signal of subsymbols. An Inverse Fast Fourier Transform is performed on the subsymbols to generate a second transformed signal of the subsymbols. The second transformed signal is then companded, making them ready for transmission as optical signals.
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