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首页> 外文期刊>IEEE Transactions on Vehicular Technology >Performance analysis of cellular CDMA networks over frequency-selective fading channel
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Performance analysis of cellular CDMA networks over frequency-selective fading channel

机译：频率选择性衰落信道上蜂窝CDMA网络的性能分析

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摘要

An effect of multipath fading on the performance of a cellular code-division multiple-access (CDMA) system is analyzed in this paper. A wide-sense stationary uncorrelated scattering (WSSUS) channel model and the coherent binary phase-shift keying (BPSK) with asynchronous direct-sequence (DS) spreading signal are assumed in the analysis. The average error probability for both the forward link and reverse link of a cellular CDMA system over a frequency-selective fading channel using a conventional correlation-type receiver and RAKE receiver are derived. The impact of imperfect power control and channel capacity of a cellular CDMA system is also investigated. The closed forms of average error probability derived in the paper can save a lot of computation time to analyze the performance and channel capacity of a cellular CDMA system. The analytical results show that the performance and maximum transmission rate of cellular CDMA systems degrade with an increase in the number of simultaneous users and the number of interfering cells. The signal-to-interface ratio (SIR) for the reverse link derived in this paper can directly describe the interrelationships among a number of paths, number of users, number of interfering cells, fading factors, and maximum variation of a received unfaded signal.
机译：本文分析了多径衰落对蜂窝码分多址（CDMA）系统性能的影响。分析中假设了广义广义静止不相关散射（WSSUS）信道模型和具有异步直接序列（DS）扩展信号的相干二进制相移键控（BPSK）。推导了使用常规相关类型接收机和RAKE接收机在频率选择衰落信道上蜂窝CDMA系统的前向链路和反向链路的平均错误概率。还研究了不完善的功率控制和蜂窝CDMA系统的信道容量的影响。本文推导的封闭形式的平均错误概率可以节省大量的计算时间来分析蜂窝CDMA系统的性能和信道容量。分析结果表明，随着同时用户数和干扰小区数的增加，蜂窝CDMA系统的性能和最大传输速率下降。本文得出的反向链路的信号接口比（SIR）可以直接描述许多路径之间的相互关系，用户数量，干扰小区数量，衰落因子以及接收到的未衰落信号的最大变化。

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