| 水声CDMA多用户通信系统仿真研究 |
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| 引用本文： | 和麟,孙超.水声CDMA多用户通信系统仿真研究[J].计算机仿真,2010,27(4):99-101,158. |
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| 作者姓名： | 和麟 孙超 |
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| 作者单位： | 西北工业大学声学工程研究所,陕西,西安,710072 |
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| 摘 要： | 针对水声环境通信系统码间干扰和相位偏移问题是水下多用户通信面临的主要问题,水下有限的发射功率使接收机对远距离用户信号的接收性能较低。提出了一种水声码分多址多用户通信系统,系统采用多输入多输出(M IMO)判决反馈均衡器补偿码间干扰、抑制多址干扰,同时利用扩频增益提高接收性能并进行仿真验证。计算机仿真结果表明,当扩频码长度为15、输入信噪比为16dB、远距离用户信号功率比近距离用户低14dB时,接收机能够对各用户信号无误码地接收,证明了系统的有效性。
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| 关 键 词： | 水声通信 多用户 码分多址 多数入多输出均衡 远近效应 |
Simulation of CDMA Multiuser Communication System for Underwater Acoustic Channels |
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| HE Lin,SUN Chao.Simulation of CDMA Multiuser Communication System for Underwater Acoustic Channels[J].Computer Simulation,2010,27(4):99-101,158. |
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| Authors: | HE Lin SUN Chao |
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| Affiliation: | Institute of Acoustic Engineering/a>;Northwestern Polytechnical University/a>;Xi'an Shanxi 710072/a>;China |
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| Abstract: | The performance of direct-sequence code-division multiple-access(CDMA) syetem depends primarily on the orthogonality of the codes,which is destroyed by the multipath propagation of the underwater acoustic channel.In this paper,a CDMA multiuser underwater acoustic communication system is proposed.A MIMO decision-feed-back equalizer is employed to cancel the intersymbol interference(ISI) and supress multiple-access interference(MAI).This system has high level of tolerance for the near-far effect due to an ext... |
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| Keywords: | Underwater acoustic communication Multiuser CDMA MIMO equalization Near-far effect |
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