摘要: |
介绍了话音静噪的含义及调幅(AM)话音通信中静噪遇到的难题,论述了AM信号的中频数字
化
解调原理和话音静噪原理,提出了一种有效的AM信号调制度判别方法,最后举例说明了在实
际应用中
如何利用AM调制度判决方法来解决话音静噪问题。 |
关键词: 话音通信;AM调制度 话音静噪 软件无线电;信号-噪声及失真
比 |
DOI: |
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基金项目: |
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An effective integrated processing method for quieting tone and its application |
LI Yan-bin |
() |
Abstract: |
The meanings of quieting tone and the difficulty of quieting in amplitude modula
tion(AM) audi
o communication are introduced.The intermediate frequency(IF) digital
demodulation theory and quieting
tone principle are discussed. An effective method of distinguishing AM modulati
on degree i
s adopted. How to make use of the method
to solve the quieting problem in application is illustrated with an example. |
Key words: voice communication AM modulation degree quieting tone software defined radio signal to noise and
distortion ratio(SINAD) |