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- In order to obtain high range resolution, the Chirp signal is used as subpulse to form stepped frequency modulated radar signal. 摘要为了获得高距离分辨率,将线性调频信号作为子脉冲构成调频步进雷达信号。
- The acoustical transfer function and transfer loss of exhaust muffler can be obtained by using chirp signal as excitation at the inlet of exhaust muffler. 采用适当的人工边界条件来描述排气口外部的半无限空间,通过进气口端正弦扫频激励,可求得出口端的响应,从而获得该排气消声器系统的传递函数和传声损失。
- Chirp signal(LFM) is a kind of large time and band product signal used in pulse compression radars.It's advantage is non-sensitive to the Doppler shift of echo signal in the matching filter. 线性调频(LFM)信号是脉冲压缩体制雷达中广泛应用的大时宽带宽积信号,其突出优点是匹配滤波器对回波信号的多普勒频移不敏感。
- Stretch processing is used to demodulate and remodulate the wideband chirp signal, which can reduce the system IF bandwidth, and reduce the complicated degree of the system remarkably. 该模拟器采用去斜率解调和调制处理来降低系统中频处理带宽,从而降低了系统复杂程度。
- For the problem of parameter estimation of one dimensional and two dimensional chirp signal in additive colored Gaussian noise, a new method based on fourth-order cumulant is proposed. 摘要针时加性高斯有色噪声背景下的一维、二维线性调频信号的参量佑计问题,引入高阶统计量,提出了一种基于四阶累积量的新方法。
- Experiment on acoustic pyrometry is done using the chirp signal, white noise and sine wave respectively in a 300MW boiler in one domestic power plant, through fire hole on furnace wall. 在国内某电厂的300MW机组锅炉上,利用炉墙上的观火孔,分别用扫频信号、白噪声信号和正弦信号进行了冷态下的声学测温试验。
- wide-band stepped-frequency chirp signal 宽带调频步进信号
- The experimental results show that the method is very effective for both the multicomponent signals consisted of the LFM’s and nonlinear frequency modulation chirp signals. 实验结果表明, 该方法对由多个LFM信号构成的多分量信号和非线性调频信号都非常有效。
- stepped-frequency chirp signal (SFCS) 调频步进脉冲信号
- linear frequency-stepped chirp signal 线性调频步进信号
- Birds had begun to chirp among the trees. 鸟儿们已经开始在树林里叽叽喳喳地叫了。
- He stepped up so as to be able to speak. 为看得更清楚,他上到高处。
- My boss was too old to work well. He stepped down. 我的老板年龄太大,做不好工作了,他上星期离了职。
- In this paper,the first order approximate model of Doppler frequency is assumed,and an algorithm based on the extended RELAX method is proposed to estimate the parameters of chirp signals. 该文采用上述情形的多普勒频率的分段一阶近似模型,在此基础上,提出一种基于推广RELAX算法的线性调频信号参量估计方法。
- The man stepped in and asked for my father. 那个人走进来求见我父亲。
- She stepped aside to let them pass. 她站到一边让他们走过去。
- The ice cracked as I stepped onto it. 我一踩冰就裂了。
- He bounced into the room with a springy step. 他以轻快的跑步跳进房间。
- He stepped on to the sidewalk from the bus. 他从公共汽车走下到人行道上。
- Enhancing chirp signal based on rotation of time-frequency plane 基于时频面旋转的线性调频信号增强