| 摘要 |
A method for deriving a bound on communications capacity with ideal quadrature layered communications QLM and a set of demodulation algorithms for QLM. Communications links using QLM can approximate this bound and support higher data rates than allowed by the Shannon bound. Demodulation algorithms can be grouped into symbol algorithms and bit algorithms. Bit algorithms support higher data rates than symbol algorithms with lower computational complexities at the expense of demodulation loss which can be reduced with bit correlation error correction decoding which is orthogonal to the channel error correction decoding. Representative symbol and bit implementation algorithms are derived. Modulation performance is compared with phase-shift-keying PSK and quadrature amplitude modulation QAM. The invention describes how QLM can be used with PSK, QAM and with gaussian minimum shift keying GMSK, orthogonal frequency division multiple access OFDMA, code division multiple access CDMA, and wavelet division multiple access WDMA.
|
