| 多功能QPSK/QAM调制转换器的设计与实现 |
| |
| 引用本文： | 周中武,曾文海,陈燕东. 多功能QPSK/QAM调制转换器的设计与实现[J]. 电子工程师, 2004, 30(2): 42-44,65 |
| |
| 作者姓名： | 周中武 曾文海 陈燕东 |
| |
| 作者单位： | 湖南大学电气与信息工程学院,湖南省长沙市,410082 |
| |
| 摘 要： | 现行数字有线电视前端设备中通常采用的专用解复用／控制芯片的价格昂贵以及前端系统实现方案不够灵活是数字电视前端系统成本居高不下的主要原因。文中分析了现行数字CATV前端数字卫星电视转发方案的不足，提出了一种基于通用DSP芯片的应用于数字有线电视前端的数字卫星电视QPSK／QAM调制转换器实现方案，介绍了系统硬件构成和设计的关键技术，以及系统软件设计特点、主软件设计流程及节目过滤器的软件设计流程，最后简述了系统的实现结果。
|
| 关 键 词： | QPSK QAM 调制转换器 设计 数字有线电视 解复用 控制芯片 软件设计 节目过滤 |
| 修稿时间： | 2003-09-25 |
The Design and Implementation of a Multifunction QPSK/QAM Trans-Modulator |
| |
| Zhou Zhongwu,Zeng Wenhai,Chen Yandong. The Design and Implementation of a Multifunction QPSK/QAM Trans-Modulator[J]. Electronic Engineer, 2004, 30(2): 42-44,65 |
| |
| Authors: | Zhou Zhongwu Zeng Wenhai Chen Yandong |
| |
| Abstract: | For the present, the high price of the specific de multiplexer/controller chips being used in the equipments designed for digital TV front end system, and the inflexible implementation scheme of the front end system are the important causes of the high price of the digital TV front end system. In the paper, it analyzes the defect existing in the QPSK/QAM trans modulator for digital CATV front end system, and brings forward a type of QPSK/QAM trans modulator based on universal DSP. The hardware of the system is described and the key technology of the hardware design is pointed out, then the software design of the system is introduced. At last, the result of the implementation is introduced. |
| |
| Keywords: | QPSK/QAM trans modulator program filter single chip zero IF tuner digital TV |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
