| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a system and method for virtual I/Q multiplexing in optical code division for secure local area OFDM. <P>SOLUTION: The method for virtual I/Q multiplexing includes, encoding a wide spectrum signal, which includes a plurality of spectral bins, to provide a complementary spectral coding, over at least two channels. The complementary spectral codings are intensity modulated with opposite polarity for each channel. An M-ary orthogonal frequency division multiplexing (OFDM) signal is modulated by using the complementary spectral codings of opposite polarity with separate complementary spectral encoded (CSE) optical codes to provide a virtual in-phase (I) and quadrature (Q) (I/Q) multiplexing with respect to the OFDM signal. <P>COPYRIGHT: (C)2009,JPO&INPIT |
