Performance analysis of DS/CDMA with noncoherent M-ary orthogonal modulation in multipath fading channels
Performance analysis of DS/CDMA with noncoherent M-ary orthogonal modulation in multipath fading channels
复制标题
多径衰落信道中非相干多进制正交调制DS/CDMA性能分析
DOI：
10.1109/49.298060
复制
发表时间：
1994
期刊：
影响因子：
--
通讯作者：
J. Holtzman
中科院分区：
文献类型：
--
作者：
Louay M. A. Jalloul;J. Holtzman
本文分析了采用多进制正交调制和非相干解调的DS/CDMA系统的性能。该系统工作在多径衰落信道中。解调采用等增益合并的RAKE接收机结构。给出了仅依赖于多径能量的一阶矩和二阶矩的误比特概率的近似值。分析结果与计算机模拟结果进行了比较。可以看出，近似是准确的多径能量与现实的变异系数。系统的性能也进行了评估的能力，这是定义为在一个给定的比特错误概率可以支持的用户的数量。该近似用于评估由于多径衰落引起的功率变化而导致的容量降低。>
The performance of a DS/CDMA system using M-ary orthogonal modulation with noncoherent demodulation is evaluated. The system operates in a multipath fading channel. A RAKE receiver structure with equal gain combining is used for demodulation. An approximation to the bit error probability is given which depends only on the first- and second-order moments of the multipath energies. The analysis results are compared with the results from computer simulations. It is seen that the approximation is accurate for multipath energies with realistic coefficient of variation. The system performance is also evaluated in terms of the capacity, which is defined as the number of users that can be supported at a given bit error probability. The approximation is used to evaluate the capacity reductions due to power variations caused by multipath fading. >