On the modulation and signalling design for a transform domain communication system
On the modulation and signalling design for a transform domain communication system
复制标题
DOI：
10.1049/iet-com.2013.1076
复制
发表时间：
2014-11
期刊：
影响因子：
--
通讯作者：
R. Lin;G. Bi;Xin Liu;Y. Guan
中科院分区：
文献类型：
--
作者：
R. Lin;G. Bi;Xin Liu;Y. Guan
已经提出了变换域通信系统(TDCS)，通过合成仅包含未使用频带中的能量的自适应波形来建立低截获概率的通信链路。然而，这种通信系统存在频谱效率低的问题。为了提高TDC的频谱利用率，本研究提出了一种用于TDC的统一调制框架，将先前报道的调制方案包含在一个框架下。与这些以前的方案相比，所得到的频谱效率更高。此外，为了对抗慢衰落，提出了一种采用该调制方案的TDCS系统，该系统采用两根发射天线和一根接收天线。仿真结果表明，在慢衰落环境下，与单天线系统相比，多天线系统的性能有了很大的提高。
Transform domain communication system (TDCS) has been proposed to establish a communication link with a low probability of interception by synthesising an adaptive waveform containing energy only in the unused frequency bands. However, this communication system suffers from a low spectral efficiency. To improve its spectral efficiency, a unified modulation framework for a TDCS is proposed in this study to embrace the previously reported modulation schemes under one framework. The resulting spectral efficiency is higher compared to these previous schemes. Also, to combat the slow channel fading, a TDCS system using two transmit antennas and one receive antenna with the proposed modulation scheme is presented. Simulation results show that the multiple-antenna system improves the performance dramatically compared to the single antenna system under the slow fading environment.