作　　者： (牛红威）; (叶亮）; (李卓明）; (石纪福）;

机构地区： 哈尔滨工业大学电子与信息工程学院,黑龙江哈尔滨150001 通信网信息传输与分发技术重点实验室,河北石家庄050081

出　　处： 《无线电通信技术》 2017年第5期42-46,共5页

摘　　要： 在时频双弥散信道下,传统频域资源分配算法对基于WFRFT的混合载波系统难以起到良好改善作用,针对此问题,提出一种在分数域上进行资源分配的改进算法。分数域是由传统时/频域扩展而来,对于信道的实际环境考虑全面。算法基于分数域理论基础,在分数阶次上传输发射信号,从而提升通信系统的整体性能。仿真结果表明,对于混合载波系统而言,改进算法较频域资源分配算法有更好的比特误码率性能。 In time-frequency doubly dispersive channels, traditional frequency domain resource allocation algorithms cannot makegood improvement for hybrid carrier systems based on WFRFT. To overcome this problem, an improved algorithm of resource alloeationin fractional domain is proposed. Fractional domain is an extension of traditional time/frequency domain, and can comprehensivelyconsider the actual channel environment. The improved algorithm is developed in the fractional domain, and can fully send the transmissionsignals on the matching fractional order, thus maximizes overall performance of the system. Simulation results show that the proposedalgorithm has a better bit error rate performance than the frequency domain resource allocation algorithm for hybrid carrier systems.

关 键 词： 双弥散信道 混合载波 分数域 资源分配