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首页> 外文期刊>電子情報通信学会技術研究報告. 無線通信システム. Radio Communication Systems >Experimental evaluation of throughput performance by changing channel coding rate and multiplexed code channels in reverse link for VSF-CDMA broadband wireless access
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Experimental evaluation of throughput performance by changing channel coding rate and multiplexed code channels in reverse link for VSF-CDMA broadband wireless access

机译：通过改变VSF-CDMA宽带无线接入的反向链路中的信道编码率和多路复用代码通道的吞吐量性能的实验评估

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摘要

This paper experimentally investigates the throughput performance of Variable Spreading Factor (VSF)-CDMA broadband wireless access in the reverse link multipath fading channel, employing the change of channel coding rate, R, and the number of multiplexed codes, C{sub}(max) according to the received signal energy per symbol-to-background noise spectrum density ratio (E{sub}s/N{sub}0) assuming QPSK data modulation. The experimental results demonstrated that in a multipath fading channel, up to six paths, VSF-CDMA increases the achievable throughput by increasing R and C{sub}(max) according to the increase in the average received E{sub}s/N{sub}0. Furthermore, we experimentally elucidated that the above 20 Mbps throughput is achieved using 40-MHz bandwidth at the average received E{sub}s/N{sub}0= 8.8 dB, by employing QPSK data modulation, R = 1/2 and C{sub}(max)=3 codes of the spreading factor SF = 4 in a four-path fading channel, where the spectrum efficiency corresponds to above 20 Mbps/ 40 MHz = 0.5 bits/Hz.
机译：本文实验地研究了反向链路多径衰落通道中可变扩散因子（VSF）宽带无线接入的吞吐量性能，采用通道编码率，R和多路复用代码的数量，C {sub}（max ）根据QPSK数据调制，根据每个符号到背景噪声频谱浓度比（E {Sub} S / N {Sub} 0）的接收信号能量。实验结果表明，在多径衰落信道中，VSF-CDMA通过增加R和C {Sub}（MAX）增加可实现的吞吐量，根据平均接收的E {Sub} S / N { sub} 0。此外，我们通过采用QPSK数据调制，R = 1/2和C，通过实验地阐明了使用40-MHz带宽来实现上述20Mbps的吞吐量。通过采用QPSK数据调制，r = 1/2和c {sub}（max）=四路径衰落信道中的扩频因子Sf = 4的3个代码，其中频谱效率对应于高于20mbps / 40mHz = 0.5位/ Hz。

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