| 题名 | 多载波正交幅度调制解调的技术研究与DSP实现 |
| 作者 | 刘德华 |
| 学位类别 | 博士 |
| 答辩日期 | 2005 |
| 授予单位 | 中国科学院声学研究所 |
| 授予地点 | 中国科学院声学研究所 |
| 关键词 | 多进制正交幅度调制 多载波调制 快速傅立叶变换 DSP技术 |
| 中文摘要 | 随着通信技术的不断进步，通信网络正快速地向包括数据、语音、图像和视频的综合宽带多媒体方向发展。人们对通信质量和通信速度也相应地提出了新的要求。于是，多载波调制技术，凭借出色的对抗多径信道衰落的特性和极高的频谱利用率，正在获得深入的研究和广泛的应用。本文完成了在长距离电缆（〕Zkm）上实现高速数据传输（≥10MbPs），并且误码率控制在10-11以下的高速数字通讯系统的关键理论研究、计算机算法仿真、硬件及软件的预研工作。首先，本文提出采用"多载波多进制正交幅度调制解调"技术在"长距离电缆"上进行数据高速通讯。研究并分析了MCM的理论及其实现的关键技术；重点分析了多进制正交幅度调制"M-QAM的性能，并建立了最佳参数选择的规则；提出了数据与星座图点图的映射算法。其次，本文对系统做了详细的性能分析并进行了计算机仿真。通过Matlab编程实现了基于A、VGN信道的系统的浮点仿真研究；同时在计算机上实现了系统的定点仿真研究；提出了一种解决基于FFT定点运算的新方法。最后，利用DSP芯片，研制一个通用的信号处理平台。在该硬件平台上实现了多载波正交幅度的调制及解调。 |
| 英文摘要 | According to the rapid development of communication technology, the network is required to provide integrated broadband multimedia services, which consist of data, voice, image, and video and so on. The new requestment for communication quality and transmission rate has been put forward. Therefore, multi-carrier modulation (MCM) technique is given more and more attention because of its various advantages in lessening the severe effects of frequency selective fading and in high frequency spectra utilization ratio. The crucial theory analysis, systematic simulation research and preliminary study of software and hardware of high-speed digital communication system , based on long distance cable and the symbol error probability is under 10~n, are finished. Firstly, using 'Multi-Carrier Multi-level Quadrature Amplitude Modulation' technology, high-speed digital communication based on 'long distance cable' is developed. Keys of theory and realization of MCM is studied; performance analysis of M-QAM is laid special stress; the method of selecting optimal parameter is established. At the same time, a mapping algorithm between data and constellation is raised. Secondly, the systematic performance analysis and simulation research are finished. The floating-point simulation of system is accomplished based on AWGN channel under Matlab. At the same time, the fixed-point simulation of system is finished. A new method of FFT fixed-point arithmetic is put forward. Lastly, a general signal processing platform is developed using DSP chip, in which Multi-Carrier Quadrature Amplitude Modulation and demodulation are realized. |
| 语种 | 中文 |
| 公开日期 | 2011-05-07 |
| 页码 | 51 |
| 内容类型 | 学位论文 |
| 源URL | [http://159.226.59.140/handle/311008/972]  |
| 专题 | 声学研究所_声学所博硕士学位论文_1981-2009博硕士学位论文 |
| 推荐引用方式 GB/T 7714 | 刘德华. 多载波正交幅度调制解调的技术研究与DSP实现[D]. 中国科学院声学研究所. 中国科学院声学研究所. 2005. |
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