A novel modulation scheme for user devices equipped with a single-RF MIMO transmitter

A new modulation technique called Multi-Dimensional Continuous Phase Modulation (MCPM) is proposed for user devices with a single-RF MIMO transmitter in cellular communications. MCPM has a Peak to Average Power Ratio (PAPR) equal to 0dB, thus the power amplifier in user terminal works with the highest power efficiency. In fact, MCPM is a generalization of classical CPM for multiple antennas systems. It is shown that using a few number of antennas, MCPM reaches to the capacity of Gaussian input approximately. Utilizing MCPM modulation in user device enables us to implement very cheap power amplifier while there is negligible loss in information capacity. Discrete constellation MCPM is also proposed and its mutual information is presented using some numerical techniques.