Orthogonally-Multiplexed On-Off-Keyed Modulation

摘要

Combining the orthogonal multiplexing signaling and the on-off-keyed signaling, the orthogonally-multiplexed on-off-keyed amplitude modulation (OMO~2AM) family and the orthogonally-multiplexed on-off-keyed phase modulation (OMO~2PM) family are proposed and investigated in this paper. Based on the maximum-likelihood principle, the optimum schemes for coherently demodulating OMO~2AM and OMO~2PM signals on the additive white Gaussian noise channel are developed. Union bounds are developed to evaluate the bit error probability characteristics of the optimum schemes. The power spectral density characteristics are studied in terms of fractional power containment. The OMO~2AM and OMO~2PM schemes are found to provide not only the same trend as, but also significant improvement over, the conventional OMOAM and OMOPM schemes in spectral efficiency, while exhibiting very different trends in power efficiency. The OMO~2AM and OMO~2PM families also provide other choices of power and spectral efficiencies than the efficiencies achieved by the OMOAM and OMOPM families.