期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
Study on pattern time delay shift coding scheme 被引量:1
1
作者 YIN Jing-wei HUI Jun-ying +1 位作者 WANG Yi-lin YAO Zhi-xiang 《Journal of Marine Science and Application》 2006年第3期51-56,共6页
Pattern Time Delay Shift Coding (PDS) scheme is robust for underwater acoustic communication. The digital information are encoded in the time delay shift values of the Pattern, so the PDS scheme belongs to the Pulse P... Pattern Time Delay Shift Coding (PDS) scheme is robust for underwater acoustic communication. The digital information are encoded in the time delay shift values of the Pattern, so the PDS scheme belongs to the Pulse Position Modulation (PPM). Several Patterns are selected for code division that the communication system could have a high ability to mitigate the inter-symbol interference (ISI) caused by multipath channel. Four communication channels work on the same time divided by different frequency, which lead to 1000bits/s of the data rate of communication. The simulation experiments show that the PDS system could adapt to many underwater acoustic channels for high data rate and high reliability. 展开更多
关键词 pattern time delay shift coding underwater acoustic communication inter-symbol interference (ISI)
下载PDF
Parametric array differential Pattern time delay shift coding underwater acoustic communication in the under-ice environment 被引量:1
2
作者 YIN Jingwei ZHANG Xiao +2 位作者 ZHU Guangping TANG Shengyu SUN Hui 《Chinese Journal of Acoustics》 CSCD 2016年第4期431-439,共9页
In order to meet the demands of underwater acoustic communication in under ice environment,a differential Pattern time delay shift coding underwater acoustic communication method based on parametric array is introduce... In order to meet the demands of underwater acoustic communication in under ice environment,a differential Pattern time delay shift coding underwater acoustic communication method based on parametric array is introduced in this paper.The under ice underwater acoustic channel is characterized by heavy multipath transmission.Under this model,a parametric array emission method of Pattern signal is derived and the system performance is analyzed.A broadband low frequency sound waves with narrow beam-pattern,which will reduce the interface reflections and suppress the effects of multipath transmission,can be obtained by the emission method.The Songhua River under ice trial results show that there is an anti-multipath property and a higher data rate in the under-ice acoustic channel in proposed approach. 展开更多
关键词 time lfm Parametric array differential Pattern time delay shift coding underwater acoustic communication in the under-ice environment
原文传递
A study on pattern time delay shift coding underwater acoustic communication
3
作者 HUI Junying LIU li +1 位作者 FENG Haihong LIU hong(Underwater Acoustics Institute, Harbin Engineering University Harbin 150001) 《Chinese Journal of Acoustics》 1999年第2期105-120,共16页
The high rate digital acoustic communication technique for horizontal channels has been studied in this article. It is called as 'Pattern Time Delay Shift Coding (PDS) communication system.' The aim of the PDS... The high rate digital acoustic communication technique for horizontal channels has been studied in this article. It is called as 'Pattern Time Delay Shift Coding (PDS) communication system.' The aim of the PDS is to improve the quality of communication in shallow water. The open water experiments shoe that at the condition of 2 kHz bandwidth, the communication rate is more than 300 bit/s and error rate is at the level of 10-4. The details of PDS technique will be shown, including: principle of PDS coding, the model of Anti-multipath illterference and open water experimenis 展开更多
关键词 IEEE time A study on pattern time delay shift coding underwater acoustic communication
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部