基于相似变换的CEFQPSK交叉调制模型设计与分析  

Design and Analysis on Model of Cross Modulated Constant Envelope FQPSK Signal Based on Similarity Transformation

作　　者：屈鹏[1,2] 柏鹏[1] 李明阳[1] 彭卫东[1] 王谦喆[1] 

机构地区：[1]空军工程大学综合电子信息系统与电子对抗技术研究中心,陕西西安710051 [2]空军工程大学装备管理与安全工程学院,陕西西安710051

出　　处：《电视技术》2014年第19期134-138,共5页Video Engineering

基　　金：国家自然科学基金项目(61201209)

摘　　要：针对传统FQPSK调制方式存在包络起伏及中心点不连续问题,在对FQPSK进行改进的基础上,提出一种波形集完全对称的恒定包络FQPSK调制方案。通过类比I/Q调制与连续相位调制过程,确定相似变换参量;通过等效替换,导出恒定包络FQPSK信号表示成连续相位调制的形式。对改进后恒包络FQPSK模型进行了仿真分析,仿真结果表明新方法继承了FQPSK调制信号良好的性能,实现简单,为非线性信道下数据传输处理提供了有价值的技术参考。In order to overcome the difficulty that FQPSK signals has little envelope fluctuation and is not differentiable, a constant envelope FQPSK modulation scheme with symmetrical waveforms is proposed based on the improvement of FQPSK. Through the analogy of I/Q modulation and CPM, the similarity transformation parameter is obtained. And the continuous phase modulated CEFQPSK signal is derived through equivalent substitution. Finally the improved CEFQPSK model is simulated and analyzed. The result shows that the performance of new method is as well as the FQPSK sig- nals. The method is relatively-simple realized, providing technique reference for the data transmission and processing in the nonlinear-channel.

关 键 词：恒定包络FQPSK 连续相位 谱效率 相似变换 

分 类 号：TN915[电子电信—通信与信息系统]