| 水下声信道波通信自适应传输技术 |
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| 引用本文： | 周国庆,SHIM Taebo,冯瑜,郝建军.水下声信道波通信自适应传输技术[J].山东科技大学学报(自然科学版),2008,27(6). |
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| 作者姓名： | 周国庆 SHIM Taebo 冯瑜 郝建军 |
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| 作者单位： | 1. 崇实大学,水下声音通信研究所,韩国,首尔,156743
2. 山东科技大学,信息与电气工程学院,山东,青岛,266510 |
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| 摘 要： | 主要研究了水下声信道(UACh)可靠通信的数据传输技术.如果水声信道的参数是可估计的并且该估计值能即时反馈回发射机,则接收机就能够根据信道的变化调整传输方式.研究假定一个在慢变的UACh上的固定声源和接收装置,在此UACh上先传输大量的瞬时信噪比恒定信号,然后按瑞利衰落分布改变信噪比值.由信道容量的理论推导表明,可以通过优化数据传输速率来实现发射功率随信噪比改变,但受平均功率条件限制.仿真研究也表明,利用自适应技术,能够较好地适应UACh通信的信道变化,此外,低频情况下坡地坡度的改变对信道容量的影响是不容忽视的.
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| 关 键 词： | 水下声道容量 自适应传输技术 瑞利衰落 坡地条件 |
The Self-adaptive Transmission Technique for Underwater Acoustic Channel Communication |
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| ZHOU Guo-qing,SHIM Taebo,FENG Yu,HAO Jian-jun.The Self-adaptive Transmission Technique for Underwater Acoustic Channel Communication[J].Journal of Shandong Univ of Sci and Technol: Nat Sci,2008,27(6). |
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| Authors: | ZHOU Guo-qing SHIM Taebo FENG Yu HAO Jian-jun |
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| Institution: | ZHOU Guo-qing1,SHIM Taebo1,FENG Yu2,HAO Jian-jun2(1.Institute of Underwater Acoustic Communication,Soongsil University,Seoul 156743,Korea,2.College of Info & Electric Eng.,SUST,Qingdao,Sh,ong 266510,China) |
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| Abstract: | In this paper,a self-adaptive underwater acoustic channel transmission technique for reliable communication is studied.If the acoustic channel parameters can be estimated and sent back to the transmitter,the transmission scheme can be adapted to the channel variation.With aim to verify this technique,we assume a fixed source and receiver over a slowly varying UACh,firstly,the signal to noise ratio(SNR) is fixed after a large number of data transmitted,then,SNR change to a new value based on the Rayleigh fad... |
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| Keywords: | underwater acoustic channel capacity self-adaptive transmission technique Rayleigh fading sloping condition |
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