搜索资源列表
codeshift
- GPS的matlab程序，用于对产生的ca码进行移位，用在锁相环跟踪中对ca码调增
QPSK.rar
- QPSK是一种二维调制技术，其中水平轴称为同相轴，垂直轴称为正交轴，分别对应于星座图上的1和Q坐标。同相载波指载波本身，正交载波指相位旋转90度的载波1周。QPSK调制在实现时是采用正交调幅的方式，某星座点在1坐标上的投影去调制同相载波的幅度，在Q坐标上的投影去调制正交载波的幅度，然后将两个调幅信号相加就是所需的调相信号,QPSK is one kind of two-dimensional modulating technology, the horizontal axis is called
Cayiwei
- GPS的matlab程序，用于对产生的ca码进行移位，用在锁相环跟踪中对ca码调增 -GPS-matlab program code used to generate the ca shifting, with the phase-locked loop tracking code on the ca be adjusted by
dierti
- 信号的调制与解调,调频、调幅、调相。了解几种基本的调制方法。-Signal modulation and demodulation, frequency modulation, amplitude modulation, phase modulation. Learn some basic modulation methods.
wssus_simulink
- 仿真了WSSUS信道的调相仿真模型，通过此模块，可以观察信号在传输过程中产生的多径效应和衰落情况。-WSSUS channel simulation of the PM simulation model, the passage of this modules, can be observed in the transmission signal generated by multi-path effects and the decline of the situation.
modulation_simulation
- 此仿真中，包括模拟的调幅，调频，调相系统以及数字的ASK，FSK，PSK等调制系统。可以进行常见通信调制系统的仿真-This simulation, including analog AM, FM, phase modulation systems, and digital ASK, FSK, PSK and other modulation systems. Modulation can be common communication system simulation
QPSK
- 调相法产生QPSK信号Matlab仿真，只需粘贴到matlab上，图像立刻显示-The phase modulation method QPSK signal, Matlab simulation, just paste it into matlab, image display immediately
ExampleCode_DDS_AD9914
- DDS芯片AD9914编程，产生单音信号，双音信号以及调幅调相信号。 -AD9914 DDS chip programming, generating tone signal, dual tone signal, and the amplitude and phase signals.
信号调相仿真图
- 通过调整天线的馈电相位，可以改变其其合成的方向图 。(By adjusting the feed phase of the antenna, the direction of its synthesis can be changed.)
freq_estimate
- 该工程实现对单载波系统QPSK的频偏估计算法。调相信号在接收机相干解调时需要同频同相的参考载波，而发射机和接收机之间往往存在频率偏差，为了消除这种误差，必须在软件层面实现。使用了QPSK四相调制的信号特点进行载波频偏估计，经验证，效果较好。(This project implements frequency offset estimation algorithm for single carrier system QPSK. The phase modulation signal needs t