摘要
通过比较多种发射机结构特点,提出了一种数字复中频结构的TETRA多载波发射机。采用数字多载波合成器和数字预失真器分别实现数字域上的载波信道合成和功放线性化。系统具有更高的集成度和更为灵活的参数配置能力。仿真结果表明该多载波发射机具有良好的邻道功率抑制、杂散发射抑制和互调分量抑制能力,有效地解决了多载波发射系统中多通路处理和线性度的瓶颈问题。
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 muhi-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.
出处
《信号处理》
CSCD
北大核心
2009年第3期450-453,共4页
Journal of Signal Processing
