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Digital-baseband-system
- 数字基带系统将数字信号从时域上看时数字滚降,需要画出滚降前后的波形展示出来。频域上带宽变化了。输入滤波器之前的波形与采样判决之后的波形。采样判决前的频谱。 采样判决后的码型。 2、眼图(采样判决之前的眼图)(信噪比大眼图清晰) 3、误码曲线,(横坐标时信噪比,纵坐标时误码率) 4、Arfa变化对误码特性的影响,变好还是变差(变好),眼图清晰度变化(清晰),传递函数的带宽的变化。(带宽越大)-1.Digital baseband system point of view the d
Frequency-domain-equalization
- 基带形成与频域均衡研究在matlab中的实现-Baseband form and The Research Of Frequency domain equalization
Wavelet-learning-materials
- 从数学的角度讲,小波是构造函数空间正交基的基本单元,是在能量有限空间L2(R) 上满足允许条件的函数,这样认识小波需要L2(R) 空间的基础知识,特别是内积空间中空间分解、函数变换等的基础知识。 从信号处理的角度讲,小波(变换)是强有力的时频分析(处理)工具,是在克服傅立叶变换缺点的基础上发展而来的,所以从信号处理的角度认识小波,需要傅立叶变换、傅立叶级数、滤波器等的基础知识。-From the mathematical point of view, is to construct a
Spread-spectrum-communication
- 介绍了扩频通信的相关知识,还有扩频通信数字基带通信基础,有参考价值-Describes the spread-spectrum communications-related knowledge, as well as spread spectrum communication digital baseband communications infrastructure, a reference value
ContemporaryCommunicationSystems
- 本书提供了MATLAB在计算机上解决“现代通信系统”课程中涉及的个方面问题,分别讨论了信号与线性系统、随机过程、模拟调制、模拟数字转换、基带数字传输、数字传输、信道容量和编码、扩频通信系统等-The book provides MATLAB on the computer to solve the course of modern communication systems involved in aspects were discussed in signals and linear syst
joint-detection-of-TD-SCDMA
- 为评估TD_SCDMA下行链路联合检测接收机的性能,使用MATLAB软件进行链路仿真,本程序主要是实现用户QPSK基带调制、扩频、加扰、形成时隙、形成子帧、以及进行脉冲形成滤波,通过加性高斯白噪声信道和瑞利衰落多径信道,信道估计、联合检测等几个主要过程,整个仿真都是在基带进行的。-Link simulation to assess the performance of the TD_SCDMA Downlink joint detection receiver using MATLAB soft
System-Simulation-0f-CDMA2000
- 本程序仿真CDMA2000的复扩频过程,只考虑导频信道和一个业务信道,假设同步已建立,接收端能产生同频同相相干载波,整个仿真过程在基带中进行.-The simulation program CDMA2000 complex spread spectrum, considering only the pilot channel and a business channel, and assume that synchronization has been established, the rece
myFFT2
- 快速傅里叶变换FFT基2频域的c++代码实现-FFT algorithm
singal-produce-and-recgnise
- 基本通信信号的产生于识别,AM FM 2ASK 2FSK 2PSK QPSK的产生。(时域图 频域图 基带信号频谱 )以及分类的识别方法仿真模型-Basic communication signal arising from the recognition, the AM FM 2ASK 2FSK 2PSK QPSK generation. (Time-domain diagram frequency domain Figure baseband signal spectrum) and the
jidai_jiekuo
- 扩频通信的基带信号解扩,m序列检测,帧同步,译出原文-Spread spectrum communication baseband signal despreading
Dsiggnal_proci
- 数字信号处理一种基于matlab 文件内容/conv(卷积部分)dupconv重叠保留法freqcirconv频域圆周卷积freqconv频域卷积timecirconv时域圆周卷积timeconv时域域卷积积/fft(频域分析部分)d2fft基2FFTdft DFT最简化程序源码dtftDTFT演示/fir(fir滤波器设计)fir 的到fir滤波器hngetwindow 的到fir滤波器窗函数wn -Digital signal processing matlab file content
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
BDSSS-Transmie
- 北斗定位系统卫星下行信号的基带处理部分——基于FPGA的的直接序列扩频发射机的设计与仿真。,已通过测试。 -Beidou positioning system satellite downlink signal baseband part- based on the design and simulation of the FPGA direct sequence spread spectrum transmitter. , Has been tested.
GPS_model_sch
- GPS模块的原理图,其中包括GPS射频拓扑设计,GPS基带部分设计和GPS电源供给设计-Schematic of the GPS module, including the GPS RF topology design the GPS baseband part of the design and the GPS power supply design
SDR-sampling-theory
- 1. Matlab实现基带信号s(t)=cos(wt)的时域波形和频域结果 2. Matlab实现中频信号(基本载频+信号频率)的时域波形和频域结果 -1. Matlab baseband signal s (t) = cos (wt) time-domain waveform and frequency-domain results. Matlab intermediate frequency signal (the basic carrier frequency the+ signa
baseband-signal_ofdm
- 一个OFDM 基带信号,采用256点IFFT,子载波采用8PSK映射,加保护段,调制信号采用“削顶”方法降低PAPR,FIR 半带滤波,最后输出时域信号/频域响应。包含各级的视频域比较-An OFDM baseband signal, using the 256-point IFFT, the sub-carrier using 8PSK mapping, plus the protection section, the modulated signal " cut top"
memory_saleh_out
- 采用saleh模型对射频功率放大器进行基带信号建模,能够包含功放的记忆效应和非线性-Saleh model of the RF power amplifier for baseband signal modeling, which can contain the memory effect of the amplifier and nonlinear.
DDC_FPGA
- 基于FPGA的数字下变频器(DDC)的设计,将采样得到的高速率信号变成低速率基带信号,以便进行下一步的信号处理。由NCO、数字混频器、低通滤波器和抽取滤波器四个模块组成。采用自编的加法树乘法器,提高乘法运算效率。-Design based on FPGA digital downconverter (DDC), the high-speed signal will be sampled baseband signal into a low rate for the next step in th
dsss
- 扩频通信 dsss 基带信号与PN码异或成为扩频码-Spread spectrum communication DSSS baseband signal with a PN code isobutyl or become spread code
pll_carrier_syn
- 本程序是锁相环的仿真程序,具有接收端载波同步的功能。注释详尽,程序规范。发端的调制方式有单载波调制,BPSK调制,QPSK调制可供选择。程序中有星座图,锁相环的频差、相差图,以及解调后的基带波形。-This program is a phase-locked loop simulation program, the with carrier synchronization receiving end function. Notes detailed program specifications.