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.

引用

页数：6

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