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单用户多载波时频域联合cdma扩频的仿真，使用类编程。包含发送，信道，接收3个类。有联合扩频，调制，FFT变换，高斯信道和瑞利，解调，解扩，统计误码率等功能，减小仿真点数可使程序运行更快。,Single-user multi-carrier cdma joint time-frequency domain spread spectrum simulation, the use of programming. Send contain, channel, receiving three categ
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单音多频信号的产生和识别，采用FFT变换。应用于电话拨号。是学习数字信号处理的大作业。-Tone multi-frequency signal generation and recognition, the use of FFT transform. Applies to telephone dial-up. Digital Signal Processing is the study of large operations.
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多用户多载波时频域cdma扩频的仿真，使用类编程。包含发送，信道，接收3个类。有选择用户数，联合扩频，调制，FFT变换，高斯信道和瑞利，解调，解扩，统计误码率等功能，减小仿真点数可使程序运行更快。-Multi-user multi-carrier spread spectrum cdma time-frequency domain of the simulation, the use of programming. Send contain, channel, receiving three c
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二阶数字谐振器的频率特性和滤波器的幅频特性和相位特性和预畸变在双线性变换中的作用-Second-order digital resonator frequency filter characteristics and amplitude-frequency characteristics and phase characteristics and pre-distortion in the bilinear transform the role of
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关于线性调频波的三个小程序，包括线性调频波的生成，FFT变换，线性调频信号通过匹配滤波器-Linear frequency modulation wave on the three small procedures, including the generation of LFM wave, FFT transform, linear frequency modulated signal through the matched filter
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joint time frequency transform
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We have to design a second order Butterworth filter having a sampling frequency of 20 kHz and -3db cut of frequency at 2 kHz in visual C. Only low frequency signals can pass through this filter and the signals having the frequency higher than frequen
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ecgbeat.m
Author - Arun Kumar A , Santhom Computing Facility
Email - aka.bhagya@gmail.com
03/07/09
Program to Calculate the beats of an ECG signal
Uses Continuous Wavelet Transform
Data file should be a csv file
close all
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ecgbeat.m
Author - Arun Kumar A , Santhom Computing Facility
Email - aka.bhagya@gmail.com
03/07/09
Program to Calculate the beats of an ECG signal
Uses Continuous Wavelet Transform
Data file should be a csv file
close all
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1、 熟悉理想采样的性质，了解信号采样前后的频谱变化，加深对采样定理的理解。
2、 熟悉离散信号和系统的时域特性。
3、 熟悉线性卷积的计算编程方法：利用卷积的方法，观察、分析系统响应的时域特性。
4、 掌握序列傅氏变换的计算机实现方法，利用序列的傅氏变换对离散信号、系统及系统响
应进行频域分析。 -1, familiar with the nature of the ideal sampling to understand the spectrum of the sign
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基于采样率变换和循环卷积的GPS信号快速捕获。提出了一种适用于GPS软件接收机的C/A码和多普勒频移的快速捕获算法。该算法结合了采样变换FFT和时域卷积两种方法，提高了捕获速度和多普勒频移的精度。-Based on the sampling rate conversion and fast circular convolution of the GPS signal capture. Presents a GPS receiver software for C/A code and Dopple
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针对传统线性调频(LFM)信号参数估计算法中复杂的搜索和计算问题，提出了一种不需要参数搜索的快速
LFM信号参数估计算法。该算法先用希尔伯特变换估计LFM信号瞬时相位，再用二次相位函数拟合LFM信号瞬
时相位从而得到初始频率和调频斜率的估计-The traditional linear frequency modulation (LFM) signal parameter estimation algorithms and computational complexity of th
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一种频率估计方法，短时傅里叶变换，很基础，适合初学者。-A frequency estimation method, short-time Fourier transform，it is based, suitable for beginners.
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本次实验主要是对一个正弦信号加入高斯白噪声，然后通过傅里叶变换对正弦信号进行谱估计。最后要用matlab进行仿真，得到正弦函数的时域和频域波形，关键找出信噪比和正弦信号频谱的均方误差之间的关系。-The experiment is a sinusoidal signal which is to white Gaussian noise, then by Fourier transform of the sinusoidal signal spectrum estimation. Finally,
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这是一个基于matlab的短时傅里叶变换时频分析工具箱2-This is a matlab-based short-time Fourier transform time-frequency analysis toolbox
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此代码由eclipse开发，应用于android手机，原本用于将单片机通过蓝牙串口传来的1024个数据进行FFT变换，然后显示出电机转速值，就是频率值的60倍，蓝牙串口和FFT是难点，如果打开工程发现提示错误，要求API5，可以设置那不报错，正常运行，API5为舍弃掉的一个API-Developed by the eclipse, this code applies to android phone, originally used for the microcontroller via Blu
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This file simulates OFDM using various modulations schemes The user chooses whether to use BPSK or QPSK ar 16-QAM. Then the code proceeds by inserting Cyclic Prefix and Pilot Signals This is followed by FFT (Fast Fourier Transform) A channel is simul
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双线性变换法设计Butterworth滤波器。分别画出滤波前和滤波后的时域图和频谱图。-Bilinear transform design Butterworth filter. Draw the pre-filter and the filtered time-domain and frequency spectrum.
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正交频分复用（OFDM）是一种通过快速傅里叶变换实现的多载波宽带数字调制技术。相比一般的数字通信系统。它具有频带利用率高和抗多径干扰能力强等优点，因而适合于高速率的无线通信系统。正交频分复用 OFDM 是第四代移动通信的核心技术。论文首先简要介绍了OFDM基本原理。在给出OFDM系统模型的基础上,用MATLAB语言实现了整个系统的计算机仿真并给出参考设计程序。-Orthogonal frequency division multiplexing (OFDM) is a fast Fourier
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Channel estimation techniques for OFDM systems based on a pilot arrangement are investigated. Channel estimation based on a comb type pilot arrangement is studied through different algorithms for both estimating the channel at pilot frequencies and i
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