| 在FM广播频段内插入数字广播原理和预处理技术 |
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| 引用本文： | 范瑜,邬正义,顾江.在FM广播频段内插入数字广播原理和预处理技术[J].常熟理工学院学报,2001,15(4):30-32. |
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| 作者姓名： | 范瑜 邬正义 顾江 |
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| 作者单位： | 常熟高等专科学校物理系,江苏,常熟,215500 |
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| 摘 要： | 介绍一种将多路数字信号线性地插入一个FM信号的简单方法。模拟的FM信号能用标准的FM接收装置进行接收。多路数字信号对称地加在200kHz FM信号的两边，由数字信号接收机接收。模拟FM信号对于数字信号接收机的影响使用预消除技术来消除，通过理论分析,证明了其可行性。
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| 关 键 词： | 自适应调制 数字音频广播 数字调制 频率调制 调频广播 数字信号 预处理技术 FM信号 |
| 文章编号： | 1008-2794(2001)04-0030-03 |
| 修稿时间： | 2001年3月22日 |
Principle of Digital Audio Broadcasting in the FM Band and Pre-treating Techniques |
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| FAN Yu,WU Zheng-yi,GU Jiang.Principle of Digital Audio Broadcasting in the FM Band and Pre-treating Techniques[J].Journal of Changshu Institute of Technology,2001,15(4):30-32. |
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| Authors: | FAN Yu WU Zheng-yi GU Jiang |
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| Abstract: | A low-complexity method of linearly combining an analog frequency_modulation(FM) signal with a low_level multitone signal for simulataneous broadcasting of digital data and analog FM is proposed and evaluated. The analog FM signal can be recovered with a standard FM receiver. The digital multitone signal is added symmetrically at the band edges of the 200-kHz FM signal in contiguous band with variable width. The effect of analog FM signal in digital signal can be omitted by pre_treating techniques. |
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| Keywords: | adaptive modulation digital audio broadcasting digital modulation frequency modulation |
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