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8QAM
- 利用Matlab仿真软件,完成如图1所示的一个基本的数字通信系统。信号源产生0、1等概分布的随机信号,映射到16QAM的星座图上,同时一路信号已经被分成了实部和虚部,后边的处理建立在这两路信号的基础上。实部、虚部信号分别经过平方根升余弦滤波器,再加入高斯白噪声,然后通过匹配滤波器(平方根升余弦滤波器)。最后经过采样,判决,得到0、1信号,同原信号进行比较,给出16QAM数字系统的误码。
16qam_channel_encode
- 一、 本程序采用16QAM调制方式,对一串2进制信源进行调制,采用(7,4)循环码对信源做信道编码,用升余弦滚降函数进行基带调制,再调到高频信道;在信道上加入高斯白噪声,运用匹配滤波器解调,画出解调星座图,运用最小欧氏距离译码判决,再对信号进行信道解码,画出采用信道编码技术和不采用信道编码技术的误比特率图。-First, this program uses 16QAM modulation mode, for a string of two binary source is modulated,
BPSK
- BPSK信号升余弦调制,并进行相关解调,画出误码率曲线-BPSK signal modulation and demodulation
qpskshapeing
- QPSK信号的根升余弦成型, 和QPSK信号的矩形成型-QPSK signal root raised cosine shaping And QPSK signal rectangular forming
16QAm
- 采用MATLAB编程,产生一个16QAM基带信号,并进行实数倍插值计算。要求符号率为1 MSymbol/s,采用均方根升余弦滤波成形,滚降系数=0.5。产生{…1,0,1,1,…}的伪随机序列,经过映射、4倍成形滤波、FIR半带滤波、实数倍内插滤波,最后输出4.315倍时域/频域响应。给出信号序列经过各级滤波的时域、频域结果-Using MATLAB programming, resulting in a 16QAM baseband signal, and the real multiples
baseband-transmission-system
- 利用升余弦滤波器来接收基带信号的系统仿真,还有眼图分析-The use of the raised cosine filter to receive the baseband signal system simulation, and analysis of niose
64QAM_baseband-system-transmitter
- 产生64QAM基带通信系统发射机:基带成型滤波采用3种方式(1)采用每个符号调制一个成型滤波函数,然后将各个函数进行时域叠加的方法; (2)采用信号与低通滤波器响应函数卷积的方法;(3) matlab自带的升余弦函数-Produce 64QAM baseband communication system transmitter: baseband shaping filter uses three ways (1) the use of a molding each symbol modul
4
- SSB调制。根据产生的余弦信号,画出相应频率载波下的调制后图形。-SSB modulation. According to the cosine signal generated graphics draw the corresponding frequency carrier modulated under.
BPSK
- BPSK调制解调,对信号采用BPSK调制,载波采用升余弦滚降-BPSK modulation and demodulation of signals using BPSK modulation, the carrier uses raised cosine
DDS
- 基于DDS原理的频率信号产生方法正弦信号余弦信号-Based on the principle of DDS frequency signal generating method sinusoidal signal cosine signal
BPSK_wumalv
- BPSK信号 眼图 信噪比误码率 时域波形 余弦滚降 -BPSK signal eye SNR BER domain waveform Cosine
QPSK_daitong
- QPSK信号,数字带通传输,格雷码编码,根升余弦滤波器,加性高斯白噪声-QPSK signal, a digital bandpass transmission, gray code, root raised cosine filter, additive white gaussian noise
16QAM
- 产生16QAM信号,用平方根升余弦滤波器进行脉冲整形,平方根升余弦滤波器产生16-QAM波形波形,画出眼图(16QAM signal of pulse shaping by square root raised cosine filter, the square root raised cosine filter to generate 16-QAM waveform waveform, draw the eye)
FFT_test
- matlab fft测试程序,包括正弦余弦信号文件生成和提取文件内容并做fft变换(Matlab FFT test program, including sine cosine signal file generating and extracting file content and doing FFT transformation)
AM
- 用MATLAB产生一个频率为1Hz,功率为1的余弦信源,载波频率为10Hz,显示信号的波形及包络,求出调制信号的功率谱密度,以及相干解调后的信号波形(A cosine source with 1 Hz frequency and 1 power is generated by using MATLAB. The carrier frequency is 10 Hz. The waveform and envelope of the signal are displayed. The power