摘要
针对电磁频谱监测应用下大动态混合信号中,一些在频谱中位置不确知小信号由于ADC采样器件精度有限而无法获得较高量化信噪比采样的问题,提出了两种基于频域采样的信号采集方法,分别为选通型和动态增益控制型,这两种采集方法能够以较高的量化信噪比完成大动态混合信号中小信号的采样,仿真进一步验证了两种方法的有效性。
In applications of electromagnetic spectrum monitoring, the signals being monitored fea-tures large quantity and large dynamic. The weak signals blended with strong signals can not be sampled with proper precision because of the limitation of actual ADC devices. In order to solve the problem, two kinds of frequency domain sampling strategies which are based on gated method and dynamic gain control method are proposed in the paper. Simulation results show that both methods can acquire the weak signals in large dynamic range blended signals with high precision under cur-rent level of ADC devices.
出处
《信息工程大学学报》
2012年第4期454-459,共6页
Journal of Information Engineering University
基金
国家科技重大专项课题(2008ZX3006)
国家973计划资助项目(613148)
关键词
频域采样
大动态
选通
动态增益控制
frequency domain sampling
large dynamic range
gated method
dynamic gain control
