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dsnonoise
- 直接序列扩频系统是在发端直接用具有高码率的扩频编码去扩展信号的频谱,而在收端用相同的扩频编码进行解扩使扩频信号还原为原始信号的一种扩频方式。直接序列系统中用的编码序列通常是伪随机序列或叫伪噪声(PN)码。要传送的信息经数字化后变成二元数字序列,它和伪随机序列模二相加(或相乘)后变成复合码去调制载波。在直接序列系统中通常对载波进行二进制相移键控调制(BPSK)。当扩频调制后由天线发射出去,在接收机中要有一个和发射机中的伪随机码同步的本地码,对接收信号进行解扩,解扩后的信号送到解调器取出传送的信息-
addd
- 这是一个使用正弦型光栅调制频谱 实现图像左右相加的程序-This is a sinusoidal grating with modulation spectrum around the sum of the process of image
QAM16
- QAM16在通信系统中是一种简单的调制方式,可以提高频谱利用率,该程序可以恢复QAM16的星座图-QAM16 in a communication system is a simple modulation, spectral efficiency can be improved, the program can resume constellation QAM16
Analog-modulation-and-demodulation
- 模拟线性调制系统的调制和解调原理,编写AM、DSB、SSB调制,并画出时域波形和频谱图-Analog modulation and demodulation principle of linear modulation systems, the preparation of AM, DSB, SSB modulation, and draw time-domain waveform and frequency spec
kgehkgg
- 【matlab编程代做】AM调制及其频谱可以作为参考使用-[Do] matlab programming generation AM modulation and spectrum can be used as references
rttrrt
- 【matlab编程代做】AM调制及其频谱 可以作为参考使用学习-[do] generation matlab programming AM modulation and spectrum can be used as reference for learning
Source-Modulation
- 1.对信源进行AM,DSB,SSB调制 2.信道中各自加入进过带通滤波器后的窄带高斯白噪声,解调每个信号,并画出滤除前后,双边带信号和单边带信号的频谱。-1. Letter source AM, DSB, SSB modulation 2. Add to each channel through the band pass filter into a narrow band Gaussian white noise, each signal demodulated, filtered a
