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[Communication-Mobile] aliasingfilter DL : 0: 1）设计Butterworth型音频抗混叠滤波器； 2）参数：下通带频率300Hz；上通带频率3400Hz；下阻带频率280Hz；上阻带频率3600Hz；通带最大衰减0.3dB；阻带最小衰减40dB； 3）采用一低通滤波器和一高通滤波器级联； 4）分别确定LPF和HPF的性能指标； 5）求出两滤波器的系统函数和频率响应，并画出其幅频特性曲线； 6）求整个滤波器的系统函数和频率响应，并画出其幅频特性曲线。-1) the design of Butterworth-type audio anti-aliasing filter 2) parameters: passband frequency of 300Hz on pass-band frequency 3400Hz under the stop-band frequency of 280Hz on stop-band frequency 3600Hz passband maximum attenuation of 0.3dB minimum stopband attenuation of 40dB 3) the use of a low-pass filter and a high-pass filter cascade 4) separately to determine the performance of LPF and HPF target 5) to derive two-filter system function and frequency response, and draw its increase frequency characteristic curve 6) for the entire filter system function and frequency response, and draw its amplitude-frequency characteristic curve.
Date : 2025-12-25 Size : 15kb User : hsf
[Communication-Mobile] 2 DL : 0: 2. 关于无线信道的多普勒谱，请回答以下问题： (1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请描述产生混叠的各种原因； (2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理； (3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请回答：证明自己用计算机产生的经典谱是正确的可能方法。 -On the wireless channel of the Doppler spectrum, please answer the following questions: (1) In some radio channels, the Doppler frequency shift will cause the output signal of the wireless channel aliasing. Please describe the aliasing produced a variety of reasons (2) wireless channel in the Doppler spectrum has a classical spectrum (classic spectrum), please explain the mechanism of produce such spectral shape (3), please use the Simulink tool to write code ( S-Function mode), resulting in a single-path Rayleigh channel, the Doppler spectrum for the classical spectrum, including mobile rate of 120km/h. And requested the answer: that they used computer-generated classical spectrum is the right possible way.
Date : 2025-12-25 Size : 31kb User : Helen
[Communication-Mobile] 1 DL : 0: 抗混叠滤波在信号处理中相当重要。本文档介绍其在数字信号处理中的原理和应用。-Anti-aliasing filter is very important in signal processing.
Date : 2025-12-25 Size : 275kb User : 放羊
[Communication-Mobile] Anti-aliasing-filter DL : 0: 抗混叠滤波器Anti-aliasing filter-Anti-aliasing filter
Date : 2025-12-25 Size : 64kb User : 魏琴
[Communication-Mobile] fenlichengxu DL : 0: 一个很经典的分离程序，可以高质量的分离出混叠信号，且不需要事先知道混叠信号的样式。-A classic blind source separation program, you can isolate high-quality signal aliasing, and does not require prior knowledge of the style of signal aliasing
Date : 2025-12-25 Size : 25kb User : xiongkunlai
[Communication-Mobile] Doppler-spectrum-of-radio-channel DL : 0: 1. 关于无线信道的多普勒谱，请回答以下问题： (1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请清楚的描述产生混叠的各种原因； (2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理； (3) 请用S-function产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请回答：证明自己用计算机产生的经典谱是正确的可能方法。 -Doppler spectrum of radio channel 1, please answer the following questions (1) In some wireless channel, radio channel Doppler shift will cause the output signal aliasing. Please clearly describe aliasing for various reasons
Date : 2025-12-25 Size : 33kb User : 王林
[Communication-Mobile] Doppler-spectru-of-Wireless-channels DL : 0: 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠的原因；无线信道中的多普勒谱有一种经典谱(classic spectrum)产生的机理；-In some wireless channel, the reason of Doppler frequency shift causing aliasing Doppler spectrum in the wireless channel, the mechanism of Generating a classical spectrum (classic spectrum)
Date : 2025-12-25 Size : 23kb User : 梁赛赛
[Communication-Mobile] FMICW_y DL : 0: 基于matlab的ＦＭＩＣＷ线性调频中断连续程序。主要研究两个问题：把混叠一起的多路不同频率的调频中断连续波信号分离出来，从所分离出来的信号中提取出时延信息。-Matlab FMICW linear FM interrupt a continuous process. The main two problems: aliasing with multiple frequency interrupted continuous wave FM signal separated, extracted from the separated signal delay information.
Date : 2025-12-25 Size : 3kb User :
[Communication-Mobile] pinlvhundie DL : 0: matlab编写的演示频率混叠过程的动画，生动形象，运行完即可生成avi文件，可任何时候观看-matlab written presentation frequency aliasing process animation, vivid, after running to generate avi files can watch any time
Date : 2025-12-25 Size : 1kb User : 高君
[Communication-Mobile] DecimSpec DL : 0: 1）波形8倍抽取 2）对比直接抽取和添加抗混叠滤波器后的频谱(1) 8 times of waveform extraction 2) compare the spectrum after directly extracting and adding anti aliasing filter)
Date : 2025-12-25 Size : 1kb User : 吴简
[Communication-Mobile] 2 DL : 1: 2. 关于无线信道的多普勒谱，请回答以下问题： (1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请描述产生混叠的各种原因； (2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理； (3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请描述：自己用计算机产生的经典谱是正确的依据。(2. Regarding the doppler spectrum of the wireless channel, please answer the following questions: (1) in some wireless channels, doppler frequency shift will cause aliasing of the output signals of the wireless channel.Describe the various causes of aliasing; (2) there is a classic spectrum in the doppler spectrum in the wireless channel, please explain the mechanism of producing this spectrum shape; (3) please use Simulink tool to write code (s-function mode) to generate a single-path Rayleigh channel, whose doppler spectrum is the classical spectrum, in which the moving rate is 120km/h.And please describe: your own computer generated classical spectrum is the correct basis.)
Date : 2025-12-25 Size : 198kb User : kmdcdy