【作者】 代守群；

【导师】 梁德群；

【作者基本信息】 大连海事大学 ， 信号与信息处理， 2004， 硕士

【摘要】 随着高速率传输的应用，如视频点播、数字电视、高清晰度电视、LAN与LAN之间的互联等，对高速宽带接入的需求是巨大的。在过去的十年里，xDSL技术作为一种有效的宽带接入技术已经被推广开来，然而现有的xDSL技术及产品有很多局限性。虽然大批量的骨干网已经建立起来，但由于接入网的不完善致使其并没有被充分的利用。接入网正在成为整个通信网络的最后瓶颈。能否提供更多的服务区和更高的传输速率的宽带接入成为宽带通信最大的挑战。 作为一项突破性技术，移相重叠载波编码与现存的编码方案如脉幅调制、正交幅度调制、离散多音频等完全不同，以它出色的传输速率和距离，移相重叠载波提供了一个强有力的而又恰如其分地解决问题的途径。本文中，设计了基于移相重叠载波的对称高速传输系统，并利用MATLAB自带的SIMULINK工具箱对该通信系统进行了仿真。实验结果表明：传输距离和传输速率均具有极大的市场前景。同时该模块的创建还为今后对其他性能的测试提供了操作方便、直观的工具。 由于移相重叠载波是我们提出的一种全新的调制方法，其传输率大大高于DMT。随着传输速率的提高相位抖动对系统性能的影响愈来愈重要，所以文中还重点考察了POOW与DMT在相位抖动方面的差别。理论和实验结果表明，POOW调制解调结构抗相位抖动能力优于DMT。更多还原

【Abstract】 With the growth of high-speed applications such as VOD, Digital TV, HDTV, remote LAN-to-LAN connection, etc., the demand of high broadband access is huge. The xDSL technology and applications have been deployed as an effective broadband access method for the latest 10 years. However, the current xDSL technology and products have many limitations. Though many backbones have been built in the past 5 years, they have not been fully utilized for the access networks are not complete. The access networs are becoming the last bottleneck of the whole communications network. To provide more service areas and high speed for broadband access becomes the biggest challenge of broadband communications.As a breakthrough technology, Phase-Offset Overlapped Wave (POOW) coding technology is completely different from all existing coding technologies such as PAM, QAM, DMT, etc. Coming with its great rate and reach performance, POOW provides a powerful and proper only logical approach to resolve the problem. We have designed and simulated the communication system based on POOW with SIMULINK in MATLAB. The experiment results indicate both transmission distance and rate are satisfied. In addition, the simulation is a convenient intuitionistic tool for other performance’ s testing.Due to POOW is fire-new modulating method proposed by us, whose transmission rate outperforms DMT greatly. Timing jitter affects system performance more and more seriously with higher transmission rate. So in this article we reviewed the difference between POOW and DMT in timing jitter. We prove that POOW has better resistance to timing jitter than DMT based on the theory analysis and the experiment results.更多还原