扩展二元相移键控调制信号的多路传输  

On multi-carrier transmission of extended binary phase shift keying modulated signals

作　　者：苗圃[1] 吴乐南[1] 张鹏[1] 

机构地区：[1]东南大学信息科学与工程学院,江苏南京210096

出　　处：《电波科学学报》2013年第6期1033-1040,共8页Chinese Journal of Radio Science

基　　金：国家自然科学基金(No.61271204);江苏省研究生科研创新计划项目(CXZZ13_0101)资助

摘　　要：为有效利用信道资源，基于扩展二元相移键控（ExtendedBinaryPhaseShiftKeying，EBPSK）调制和解调的独特性，分析了多载波EBPSK调制的传输体制，推导出各路调制信号间参数约束关系，找出传输信号频谱变化规律，提出两种传输方案并设计相应的解调器，实现了多路EBPSK信号的并行传输；针对线谱分布规律修改调制波形，抑制了调制信号功率谱中的线谱杂散；取不同纽调制参数进行仿真验证，结果表明两种方案的解调性能趋于一致且与载频间隔有关，载频趋近，系统实现复杂度提高，在相同误码率下解调所需信噪比额外支出约1～2dB，但传输速率成倍提高，节省了频率资源，表明了这两种方法的可行性、有效性和利用信道资源的合理性．In order to effectively exploit spectrum resources of the channel, the multi-carrier extended binary phase shift keying （EBPSK） modulation transmission scheme based on the signal particularity is analyzed. The parameters relationship and spectral properties between modulated signals of various branches are derived. Two schemes are proposed and demodulators are designed to achieve a multiplexer EBPSK parallel transmission. The waveform optimization factor （WOF） is intro- duced to optimize the power spectrum and suppress these discrete spectral components. Take different sets of modulation parameters to simulate, the experimental results effectively demonstrate that the demodulation performance is consistent with the carrier intervals. Furthermore, an extra 1~2 dB of signal to noise ratio is cost when carrier frequency are approached. With the help of the new methodology, an additional double bit rate is obtained and the discrete periodical Fourier components are greatly suppressed. Therefore, better spectrum efficiency can be achieved which demonstrates the feasibility and validity of these schemes.

关 键 词：EBPSK调制 多载波 传输速率 功率谱优化 线谱抑制 

分 类 号：TN911[电子电信—通信与信息系统]