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Title: MMSE Receiver for DS-SS in AWGN Channel
Author: Panson Tantikovit
Summary: An adaptive receiver for DS-SS systems
MATLAB Release: R12.1
Required Products: Communications Toolbox,Signal Processing Blockset
Descr iption: This
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使用matlab对正弦信号采样 以及对其进行DFT变换,Matlab sinusoidal signal on the use of sampling, as well as its DFT transform
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香农内插值公式,可以用在数字信号处理中从采样序列中恢复出原信号。,Within the Shannon interpolation formula can be used in digital signal processing in sequence from the sample to recover the original signal.
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录制一段个人自己的语音信号。对录制的信号进行采样;画出采样后语音信号的时域波形和频谱图;对语音信号进行加噪和去噪处理,画出滤波后信号的时域波形和频谱,并对滤波前后的信号进行对比,分析信号的变化;回放语音信号;实现快录慢放、慢录快放等功能。-Record a person' s own voice signal. Of the recorded signal sampling draw sample after the speech signal time-domain waveform
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利用Matlab仿真脉冲编码调制(PCM)及A律、μ律PCM对声音进行压缩编解码过程。
脉冲编码调制(PCM,Pulse Code Modulation)是一种将模拟语音信号转换成数字信号的编码方式。波形编码器的作用是对采样后的信号样本进行量化和编码。从数学上来看,量化过程就是把一个连续幅度值的无限数集合映射成一个离散幅度值的有限数集合,编码就是用一组二进制数来表示这些映射后的有限数。国际标准化的PCM采用折叠二进制码,符合长途电话质量。根据量化方法的不同,PCM可分为均匀量化PCM和对数
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数字通信系统中采用基带传输和频带传输[ 1, 2 ] ,在抽样判决器之前,信号叠加了信道噪声. 本文利用
Matlab软件仿真[ 3, 4 ]分析了在判决器前叠加了高斯噪声后,信噪比与系统的误码率之间的关系.-Digital communication system using baseband transmission and band transmission [1, 2], in a sample before the decision device, the signal super
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Using the function to sample the voice signal and achieve fast Fourier transform in MATLAB, and then get the signal characteristics of the spectrum.Filtering the signal from the filter,and then playback the signal of voice
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GMSK调制程序,采用I/Q调制,生成基带GMSK信号,供大家学习和参考!-GMSK modulation procedures, the use of I/Q modulation, to generate baseband GMSK signal for them to learn from and reference!
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this file has codes that describes how to ccmpute the signal spectrum , the power spectrum, how to calculate the autocorrelation sequence of a signal, how to calculate the autoregressive coeffecients of a signal,and how to reduce the noisy elements i
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This package contains scr ipt to calculate aliasing for given time domain signal. scr ipt to plot in time domain the function: x(t)=A0cos(2pif0t)+A1cos(2pif1t)
where fs1=300 Hz and fs2=150 Hz (sampling rate)
A0 and A1 are amplitude s signal (a
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DPCM编码,简称差值编码,是对模拟信号幅度抽样的差值进行量化编码的调制方式.-DPCM coding, referred to as difference coding is to sample the analog signal amplitude to quantify the difference between the modulation coding.
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脉冲编码调制(PCM)实现
编程实现PCM技术的三个过程:采样、量化与编码。
采样:低通连续信号采样,以 x=sin(200*t) m=x./(200*t) m=m.*m 为例说明低通采样定理,绘出信号时、频图形;带通连续信号采样,以x=sin(20*t) m=x./t 为例说明带通采样定理,绘出信号时、频图形。
量化:均匀量化,以幅度 的正弦信号为例实现为64级电平的均匀量化;非均匀量化,输入A律PCM编码器的正弦信号 ,采样序列为 ,将其进行PCM编码,给出编码器的输出码组序列
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基于C开发的三个隐层神经网络,包括
1)初始化权、阈值子程序;
2)第m个学习样本输入子程序;
3)第m个样本教师信号子程序;
4)隐层各单元输入、输出值子程序;
5)输出层各单元输入、输出值子程序;
6)输出层至隐层的一般化误差子程序;
7)隐层至输入层的一般化误差子程序;
8)输出层至第三隐层的权值调整、输出层阈值调整计算子程序;
9)第三隐层至第二隐层的权值调整、第三隐层阈值调整计算子程序;
10)第二隐层至第一隐层的权值调整、第二隐层阈值调整计算子
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对RFID读写器接收模块的解调以及FM0解码进行了MATLAB仿真。首先我们对读写器接收到的信号进行仿真,里面附带着标签信息;其次对接收到的ASK信号进行相干解调;接着解调后的信号经过抽样判决,进行FM0解码。仿真结果可表明接收到的信号与发射的信号一致。-On the RFID reader receiver module FM0 decoding and demodulation and a MATLAB simulation. First of all we readers received
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块自适应处理算法先有采样快拍数据计算采样协方差矩阵,再来计算自适应权矢量。典型的块自适应处理算法为采样矩阵求逆(SMI)算法。仿真了采样矩阵求逆法(SMI)的波束形成方向图旁瓣的高低受信号快拍数的影响。-Block adaptive processing algorithms prior sample snapshot data of the sampling covariance matrix, again computing adaptive weight vector. A typical
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该文档详细讲述了关于matlab在通信仿真中的具体应用,包括模拟调制中的信号处理以及数字信号的抽样量化过程的matlab实例-This document describes in detail the communication matlab simulation on the specific applications, including analog modulation of the signal processing and digital signal sample quantiza
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利用SIMULINK和M函数相结合的方式仿真BFSK 调制在多路径瑞丽衰落信道中的传输性能。其中 source产生速率为10Kbit/s、帧长度为1秒的二进制数据源data,并且通过BFSK产生调制信号。BFSK调制的频率间隔为24KHz, BPSK调制符号的样点数为2,调制信号通过多径瑞利衰落信道,移动终端相对运动速率为40公里/小时,接收端对信号进行解调,并把解调后的信号和原始数据信号相比较计算误比特率。最后Sink模块根据SNR与误比特率的关系绘制曲线。-And M functions u
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The main procedure of the experiment was to sample a signal with different sampling frequencies and observe the differences between them. This experiment is important for us because it aims to teach how to use matlab commands to reconstruct a sampled
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对信号进行频谱分析时,数据样本应有足够的长度,一般FFT程序中所用数据点数与原含有信号数据点数相同,这样的频谱图具有较高的质量,可减小因补零或截断而产生的影响。-The signal spectrum analysis, data sample should be of sufficient length, the general FFT program used in the data points with the same number of data containing the sig
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Contains the eigenvalue and eigenvector extraction, the training sample, and the final recognition, A fluid manifold learning algorithm (good use), Is the basis of the signal processing.
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