摘要
调制样式识别是通信系统中的一个关键环节;利用软件无线电思想对全数字接收机中的几个关键技术进行了研究;对在低信噪比情况下数字通信信号的调制模式的识别率低的问题进行了改进,增强了识别率;对数字解调中的关键-时间同步采用软件实现,并通过仿真验证了算法的正确性。
The classification of signal modulation i.s a key in communication systems. Some important technologies are studied in digital receiver based on Software-Defined-Radio. Signal type identification is improved by mending the question that the recognition rate is low in the low Signal Noise Ratio. Time synchronization that is key technology of digital demodulation is realized by software. These arithmetic are validated by computer simulation.
出处
《计算机测量与控制》
CSCD
2006年第9期1241-1243,1277,共4页
Computer Measurement &Control
关键词
软件无线电
调制模式识别
低信噪比
数字解调
software-defined-radio
signal type Identification
low signal noise ratio
digital demodulation
