新的非相干UWB系统平均性能的理论计算方法  

Novel method to calculate average bit error probability of UWB non-coherent system

作　　者：杨志华[1] 王野[1] 张钦宇[1] 王宇峰 刘宁宁 张乃通[1] 

机构地区：[1]哈尔滨工业大学深圳研究生院通信工程研究中心,广东深圳510085 [2]总参通信部驻深圳地区军事代表室,广东深圳518001 [3]中国电子系统设备工程公司研究所通信一室,北京100039

出　　处：《通信学报》2010年第2期67-75,共9页Journal on Communications

基　　金：国家自然科学基金青年基金项目(60702034)~~

摘　　要：针对IEEE 802.15.3a信道下UWB非相干接收机的平均误码率计算问题,基于簇生点过程模型给出了一种新的求解方法。该方法通过推导接收窗口内信噪比的均值和方差的闭合表达式,分别以高斯分布和对数正态分布近似其概率分布,给出计算UWB能量检测系统平均误码率的闭合表达式。对比分析对数正态分布、高斯分布与真实分布之间的数字特征,对数正态分布近似效果的合理性好于高斯分布近似。对比基于OOK和PPM 2种调制方式的平均误码率指标,实验结果表明对数正态分布近似效果的有效性要好于高斯分布近似。A novel method based on clustered point process was proposed to calculate average bit error probability（ABEP） of UWB non-coherent system on IEEE 802.15.3a channel.In particular,the expectation and variance of the sig-nal to noise ratio（SNR） in the detection window were derived in closed form.Moreover,lognormal and normal variants were employed and compared to approximate the SNR in receiver window with respects to several characteristics.The results show that lognormal approximation is more feasible than normal approximation.In term of performance with PPM and OOK modulations,the efficiency of lognormal approximation is respectively much better than that of normal approximation.

关 键 词：IEEE802.15.3a信道 超宽带 非相干 平均误码率 簇生点过程 

分 类 号：TN911[电子电信—通信与信息系统]