Approximate equation of average bit-error rate in DS-CDMA systems over fading channels
Approximate equation of average bit-error rate in DS-CDMA systems over fading channels
复制标题
DS-CDMA系统衰落信道平均误码率的近似方程
DOI：
10.1109/tcomm.2003.809790
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
F. Takahata
中科院分区：
文献类型：
--
作者：
F. Sasamori;F. Maehara;S. Handa;S. Oshita;F. Takahata
在移动的无线通信中，信号的传输质量不仅受到加性白色高斯噪声的影响，而且还受到多径衰落的影响。直接序列码分多址系统的平均误比特率（BER）性能是以多普勒频率、时延分布、同时接入用户数等为参数进行评估的关键问题之一，本文给出了在衰落信道（多射线衰落模型）下计算平均BER的近似公式。性能评估在双射线模型、IMT 2000模型和COST 207模型中进行。从近似结果与计算机仿真结果的一致性可以证实，该方法适用于各种参数。
The transmission quality in mobile wireless communications is affected not only by additive white Gaussian noise, but also by multipath fading, which drastically changes the amplitudes and phases of wireless signals. It is one of the key themes in direct-sequence code-division multiple-access systems to evaluate average bit error rate (BER) performances as parameters of the Doppler frequency, the delay profile, the number of simultaneous access users, and so on. This paper proposes the approximate equation for easily calculating the average BER over fading channels (multiray fading models). The performance evaluations are carried out in the two-ray model, the IMT2000 model, and the COST207 model. It is confirmed from the coincidence of approximate results with computer simulation results that the proposed approach is applicable to a variety of parameters.