HFM Spread Spectrum Modulation Scheme in Shallow Water Acoustic Channels

被引：0
|
作者：
Zhang, Lan [1 ]
Xu, Xiaomei [1 ]
Feng, Wei [2 ]
Chen, Yougan [1 ]
机构：
[1] Xiamen Univ, Key Lab Underwater Acoust Commun & Marine Informa, Minist Educ, Xiamen, Peoples R China
[2] Netvox Technol CO LTD, Xiamen, Peoples R China
来源：
2012 OCEANS | 2012年
关键词：
HFM signal; Doppler Effect; Spread-spectrum modulation; Doppler-invariability; Shallow rwater acoustic communication;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Owing to the large delay spread caused by multipath propagation and the severe Doppler Effect of the shallow water acoustic channel, a spread spectrum modulation scheme using hyperbolic frequency modulated (HFM) signal named as "HFM spread-spectrum modulation" (HFM-SS) was exploited to substantially improve the performance of communications over such channels. Apart from some advantages such as reducing influence of narrow-band noise, HFM signals provide Doppler-invariability and low power cost. The effects of multipath and Doppler shift on the proposed scheme were investigated by establishing a model of a shallow water acoustic communication system. The emulated results demonstrate that it has a good prospect for underwater acoustic communication system, especially for moving platforms. High transmission stability of this approach was validated in lake experiments carried out in the summer 2011.
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页数：6
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