摘要
在对大型远程通信系统中电子信号仪进行设计的过程中,容易出现噪声干扰,导致传统的电子信号采集仪,由于未对噪声进行过滤,无法有效实现电子信号的采集,设计了一种基于卡尔曼滤波的大型远程通信系统中的电子信号采集仪,分析了电子信号采集仪的总体结构,对系统状态进行预测,求出偏差因子、状态估计误差方差、总估计方差误差以及滤波增益,对系统状态、状态估计误差、偏差因子进行实时更新。对电压有效值进行计算。当大型远程通信系统中的电子信号处于低周的半个周期时,给出处于上下边频的采样信号值,对其进行过滤。将两个连续边频的边频变化点之间的采样数据看作是同一个边频频率的数据,作为正弦波进行处理,基于不动点理论,将所求边频频率的中心频率看作是该段数据的频率,获取相位值。仿真实验结果表明,所设计的电子信号采集仪具有很高的可行性及可靠性。
The electrical signals in large telecommunication system instrument to carry on the design process, prone to noise interference, lead to the traditional electronic signal acquisition instrument, because of the noise filtering, unable to effectively realize the collection of electronic signals, in this paper, a large-scale remote communication system based on kalman filtering in the electronic signal acquisition instrument, the general structure of the electronic signal acquisition instrument is analyzed, the forecast of the system state, and the deviation factor, state estimation error variance, total estimated variance and filtering gain, the system state, state estimation error and deviation factor for real-time updates.On voltage RMS to calculate.When large electrical signals in the telecommunication system are in a low cycle of half a cycle, is given in the lower frequency sampling signal value, on the filter. Frequency changes the frequency of two consecutive points between the sampled data as the same frequency of data, as a sine wave, based on the fixed point theory, will ask the side frequency of center frequency as the frequency of the segment data, to obtain phase value.The simulation experimental results show that the design of the electronic signal acquisition instrument with high feasibility and reliability.
出处
《科技通报》
北大核心
2015年第9期151-154,共4页
Bulletin of Science and Technology
关键词
远程通信
电子信号
采集仪
remote communication
electronic signal
collection device
