准正交时分复用中样点错误概率的上界  

Upper bound of sample error probability in quasi-orthogonal time division multiplexing

作　　者：孙恩昌[1] 李于衡[1] 田斌[1] 易克初[1] 

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室,陕西西安710071

出　　处：《西安电子科技大学学报》2007年第4期518-520,615,共4页Journal of Xidian University

基　　金：国家自然科学基金资助(60572148;60532060);西安电子科技大学研究生创新基金资助(创05014)

摘　　要：针对准正交时分复用(QOTDM)系统对时间偏移敏感的问题,根据准正交时分复用系统中样点与噪声统计独立的特点,利用独立随机变量概率密度函数的可分离特性推导出QOTDM系统在接收端采样不准确情况下引起的样点错误概率公式,利用比Chernoff边界更紧密的改进Chernoff边界得到了样点错误概率的上界.样点错误概率公式和样点错误概率的上界为评估QOTDM系统的样点错误性能提供了一个有效的方法.Aiming at the deficiencies of sensitivity to time offset in a quasi-orthogonal time division multiplexing （QOTDM） system, this paper derives a formula for the sample error probability based on the separable features of the joint probability density function of independent variables, due to the statistical independence of samples and noise in the QOTDM system. Since the Modified Chernoff bound is significantly tigher than the Chernoff bound, the upper bound of sample error probability is also obtained, thus providing an efficient way to evaluate the sample error performance of the QOTDM systems.

关 键 词：准正交时分复用 样点错误概率 Chernoff边界 

分 类 号：TN914[电子电信—通信与信息系统]