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- 2. 关于无线信道的多普勒谱，请回答以下问题： (1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请描述产生混叠的各种原因； (2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理； (3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请回答：证明自己用计算机产生的经典谱是正确的可能方法。 -On the wireless c
nwmp3play_vc
- 简易MP3播放器采用VC实现非常简短实现MP3播放器功能，提供MP3随意拖放播放功能，同时提供频谱显示功能，界面非常友好，提供换肤功能。-Simple MP3 Player using VC to achieve the realization of a very short MP3 player function, the provision of free drag and drop MP3 player, while providing the spectrum display, the
HHT2
- 这是关于HHT的一个实际信号的HHT谱和边际谱源码。你只需复制到matlab即可运行。很实用。-This is about a real signal HHT HHT spectrum and marginal spectrum of the source code. You just copied to the matlab to run. Very practical.
energydetection
- 用MATLAB软件进行仿真能量检测频谱感知算法-MATLAB software to simulate the energy use of spectrum sensing algorithm for detecting
1st
- Simulink工具编写代码(MATLAB Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h，含理论描述多普勒经典谱-Simulink tools for writing code (MATLAB Function mode) to produce a single path Rayleigh channel, the Doppler spectrum for the classical spectrum, where mobile speed of
kuoping
- 扩频通信中的捕获问题，用GOLD码进行扩频， PN码相位捕获，利用捕获的相位，接收机产生偏移的GOLD码，进行解扩和误码率计算-Capture the problem in spread spectrum communication, spread spectrum codes with GOLD, PN code phase acquisition, the use of capture phase, the receiver generates offset GOLD code, for d
gaojiepu
- matlab的高阶谱（包括双谱），包括高阶谱的直接法及间接法，用于信号的检测及时差估计。-matlab higher order spectra (including dual spectrum), including high-end spectrum of the direct method and indirect method for signal detection time difference estimates.
FFT_armtest
- 自己写的一个基于eMbedded Visual C++的音频采集以及频谱分析小程序。 包括录音，回放，时域波形，频谱图-Based on the eMbedded Visual C++ of the audio spectrum analysis procedures. Including recording, playback, time-domain waveform, frequency spectrum
SDR
- 直接序列扩频通信的Verilog仿真代码，在Quartus II中实现。-Direct sequence spread spectrum communication Verilog simulation code, implemented in Quartus II.
HHT
- 这是一个完整的EMD分解全过程，有Hilbert谱和边际谱。直接把源码复制到matlab即可。很全面。-This is a complete decomposition of the whole process of EMD, a Hilbert spectrum and marginal spectrum. Directly to the source code can be copied to the matlab. Very comprehensive.
DSSS
- 设计一个有干扰的直接序列扩频通信系统， PN码由m序列产生器产生，经过高斯白噪声信道。在接收端接收到的信号包括“有用信号+高斯白噪声+干扰”，将接收信号进行解扩，判决，得到用户的信号检测结果，绘制不同的扩频增益（增益值为10，30，50）下，误比特率随信噪比Eb/N0的变化曲线。-Design of a direct sequence spread spectrum interference system, PN code generated by the m sequence generato
ofdmsystemmatlab
- 基于能量检测和周期循环检测的认知无线电频谱检测matlab代码 用周期循环检测算法检测： 首先运行a.m程序，通过此程序运算得出循环频率a值； 再运行zhouqi.m程序，对a值进行确定，通过周期循环算法对信号进行检测； 用能量检测算法检测： 运行nengliang.m检测程序，使用能量检测对信号进行检测。 检测完毕，对检测性能进行分析。 -Cognitive radio based on energy detection spectrum detecti
OFDM
- Matlab入门级OFDM仿真，包括每个步骤的波形，星座图，频谱等 含循环前后缀，时域加窗等，适合刚接触OFDM的学习 -Matlab entry-level OFDM simulation, including each step of the waveform, constellation diagram, spectrum including cycles before the suffix, such as time-domain windowing for OFDM new t
test0_fix_interfence
- 认知无线电中基于干扰图模型的动态频谱分配。此程序是基于固定干扰图模型的分析代码-Cognitive radio interference graph model based on the dynamic spectrum allocation. This procedure is based on the analysis of the fixed interference graph model code
spectrum
- 地震勘探中频谱分析程序。注意：1）掌握数据输入、输出基本语句；2）掌握数据补零的编程要求；3）掌握实信号频谱对称性原理。 -Spectrum analysis of seismic exploration program. Note: 1) master data input, output of basic statements 2) master data zeros programming requirements 3) grasp the real signal spectrum
Periodogram
- 利用周期图法对序列进行功率谱估计，数据窗采用汉明窗-Sequences using periodogram method for power spectrum estimation, the data window with Hamming window
HHT-transform
- 本程序主要通过EMD和hilbert求IMF，作出HHT归一化能量谱图（三维图），边际谱图和瞬时能量图，并做完备性验证-The program primarily through EMD and hilbert seek IMF, to HHT normalized energy spectrum (three-dimensional map), the marginal spectrum and the instantaneous energy map, and do a complete v
mfnew
- 认知无线电频谱感知匹配滤波器检测仿真，选用FM信号，分析了虚警概率-Matched filter spectrum sensing cognitive radio simulation testing, the choice of FM signals, analysis of the probability of false alarm
FFT
- 对文本文档内的数据进行傅里叶变换，得到波形 -频谱图，相位图的对话框界面-For text document data within the Fourier Transform, the wave- frequency spectrum, phase diagram of the dialog box interface
EnergeDetection
- 关于认知无线电频谱感知的能量检测程序。希望大家互相交流！-On the energy spectrum sensing cognitive radio test procedures. Hope we can exchange ideas!