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pam
- 滚降系数为0.5，载波频率fc=40/T.基带信号的频谱和幅度已调信号的频谱。-Roll-off factor of 0.5, the carrier frequency fc = 40/T. base-band signal spectrum and amplitude spectrum signals have been transferred.
NFmeasure
- 频谱仪的相位噪声测量方法，使用频谱仪大致测出频率源的输出信号相位噪声-Spectrum analyzer phase noise measurement methods, the use of broad spectrum analyzer to measure the frequency of the source of the output signal phase noise
digital_down_convertation
- 我对一个输入调制信号：采样率FS=1200K，中心频率F0=300K，带宽300K。输入信号为一个[样点数,2]的矩阵,即I,Q两路. 进行频谱搬移，分为I，Q分量两路进行矢量乘法，NCO的设置为FC=300K，t=样点数乘以1/FS， 乘完以后我的频谱上显示竟然信号带宽增加了300K，但是中心频率没有改变，请问各位朋友是哪儿出了问题？谢谢您的阅读和意见-Digital Down Converter for matlab realized, certain design speci
yinpin
- 伴随着科学技术的迅速发展，人们生活水平的不断提高，对音频功率放大器的要求越来越高。音频是多媒体中的一种重要媒体。人能够听见的音频信号的频率范围大约是 60Hz-20kHz 其中语音大约分布在300Hz-4kHz之内，-With the rapid development of science and technology, improve people' s living standard, the audio power amplifiers have become increasing
delphi-soundcard-frequency-
- 控制声卡按照一定频率,音量发声,是个正弦信号-Control the sound card in accordance with a certain frequency, sound volume, is a sinusoidal signal
CreateSound
- 该程序是一个语音信号生成的工具，可以根据需要生成任意频率、任意时间长度的语音信号，以MP3或者wav格式存储-The program is the tool of a voice signal generated at any frequency can be generated as needed, any length of time the voice signal, in MP3 or wav format
AudioTestDll
- 该程序主要是对语音信号进行分析，采用FFT变换求取信号的幅值与频率，然后与以存储模版进行比较，判断信号是否正常。-The process is essentially the voice signal using the FFT algorithm to strike a signal amplitude and frequency, and then to store the template to determine whether the signal is normal.
SinSignal
- 一个正弦波的音频信号发生器的代码,使用vc6编程,可以改变频率驱动声卡发出声音-This is a sine audio signal generator code by VC++ , you can change the frequency drive sound card play it
MediaPlayer
- 播放 器是指能播放以数字信号形式存储的视频或音频文件的软件，也指具有播放视频或音频文件功能的电子器件产品。除了少数波形文件外，大多数播放器携带解码器以还原经过压缩媒体文件，播放器还要内置一整套转换频率以及缓冲的算法。-The player is playing stored in digital signal in the form of video or audio file of the software, also refers to the electronic device havin