frequency shift signalling meaning in English
移频发信
移频发讯
Examples
- In this paper , we analyze the reason that it is difficult to process the doppler frequency shift signal generated by low velocity moving target and discuss the kalmus filter performances for low velocity moving target detection
本文分析了低速目标的多普勒频移信号难以处理的原因，并讨论了kalmus滤波器（零速率波器）对低速运动目标的检测性能。 - Firstly , according to the characteristic that the doppler frequency shift signal can be approximated as a single sinusoid signal , the extended sinusoid signal retrieval ( pisarenko and esprit ) methods are presented and signal state and measurement formulations are developed , so the kalman filter recursive method is got . the brief introduction of low velocity moving target doppler frequency shift signal wigner - ville transformation and wavelet transformation expression are presented in this paper . secondly , because the clutter is gaussian distribution , cumement and high - order spectrum based methods are presented and the simulation results prove their good performance to suppress gaussian clutter in low velocity moving target doppler frequency shift signal processing
一个方面是根据低速目标的多普勒信号可简化为单一正弦波形式这一特点，得到了扩展的高斯色噪声背景下的谐波恢复算法，即高斯色噪声中的pisarenko谐波恢复法和旋转因子不变法（ esprit ） ；并推导了信号的状态方程和观测方程，进而得到基于卡尔曼滤波的递推算法对信号进行提取；本文还简单的介绍了低速运动目标的多普勒频移信号的wigner - ville变换与小波变换；另一个方面是针对杂波服从高斯分布这一特点，提出了对接收信号求累积量和高阶谱来对高斯杂波进行抑制。