Design of Multi-carrier Transmitter for TETRA system
Li Hai · Signal Processing · 2009
A multi-carrier transmitter with digital complex IF structure for TETRA system is proposed by comparing several transmitters' characteristic.Carrier channels synthesizing and power amplifier's linearization are realized in digital domain by digital multicarrier synthesizer and digital predistortor respectively.The system is more flexible and higher integrated.Simulation result shows the proposed multi-carrier transmitter's good performance of adjacent channel power suppression,discrete spurious suppression and intermodulation suppression,so the problems of multi-channel processing and linearity in multi-carrier system is solved.