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Description: 几十个数字信号处理中的经典例程！！涵盖数字信号处理的大部分内容。-dozens of digital signal processing routines classic! ! Digital signal processing cover most of it.
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Size: 60416 |
Author: 桐桐 |
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Description: 這個事檔案是一個基礎的MIMO ofdm vblast的通訊平台, 可以對一個高斯分佈rp行程的數位信號找出其error rate performance-this is a matter files based on the MIMO OFDM vblast communications platform, can a Gaussian distribution rp itinerary digital signal to identify its error rate performanc e
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Size: 748544 |
Author: 李義嵐 |
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Description: 有关于OFDM系统的在AWGN信道下(BPSK调制)的信噪比分析.-on OFDM system in AWGN channel (BPSK modulation) signal-to-noise ratio analysis.
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Size: 4096 |
Author: H |
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Description: This about OFDM signal and its spectrum ( Guard Interval insertion )-OFDM signal and its spectrum ( Guard Interval insertion)
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Size: 4096 |
Author: xiaoshuijun |
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Description: 有关于OFDM在不同信噪比下的误比特率，大家可以看看啊-on OFDM different signal-to-noise ratio in the bit error rate, we can see ah
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Size: 3072 |
Author: fancyou |
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Description: MB-OFDM-UWB系统发射机代码(信号产生/QPSK/OFDM)、802.15.3a信道结构等。-MB-OFDM-UWB system code transmitter (signal generator/QPSK/OFDM), 802.15.3a channel structure.
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Size: 8192 |
Author: fanxinyue |
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Description: 《MIMO-OFDM关键技术的研究和完整仿真平台的建立》，建立了一个完整的MIMO-OFDM的仿真平台，为实际的硬件平台提供解决方案，给出性能评估。为建立这个完整的仿真平台，本文从MIMO-OFDM信号模型，提出系统实现的各个关键技术:帧同步和载波频偏估计、信道估计、采样同步和载波跟踪、空时/频编解码。- MIMO-OFDM key technology research and the establishment of a complete simulation platform , the establishment of a complete MIMO-OFDM simulation platform, for the actual hardware platform to provide solutions, given performance evaluation. For the establishment of the integrity of the simulation platform, this article from the MIMO-OFDM signal model, the system in all key technologies: frame synchronization and carrier frequency offset estimation, channel estimation, sampling synchronization and carrier tracking, space-time/frequency codecs.
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Size: 2463744 |
Author: 李继龙 |
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Description: 基于OFDM的无线宽带系统仿真It contains mainly two parts, i.e. link-level simulator and system-level simulator.
Link-level simulator focus on a single-cell single-user scenario, where signal is transmitted from tx, and estimated at rx. Comparing the difference in tx/rx signal, the error rate can be found out. The output of the link-level simulator is the BLER/BER vs. SNR mapping table, that can be used for the system-level simulation.
System-level simulator focus on a multi-cell multi-user scenario. For the sake of simplicity, it takes the mapping table aquired in the link-level simulation, measure the actural SNR, and finds the corresponding error rate.-OFDM-based wireless broadband system simulation It contains mainly two parts, ie link-level simulator and system-level simulator.Link-level simulator focus on a single-cell single-user scenario, where signal is transmitted from tx, and estimated at rx . Comparing the difference in tx/rx signal, the error rate can be found out. The output of the link-level simulator is the BLER/BER vs. SNR mapping table, that can be used for the system-level simulation.System- level simulator focus on a multi-cell multi-user scenario. For the sake of simplicity, it takes the mapping table aquired in the link-level simulation, measure the actural SNR, and finds the corresponding error rate.
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Size: 256000 |
Author: zhangli |
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Description: 一种降低正交频分复用信号峰均功率比的方法--压缩扩展变换-A reduced OFDM signal PAPR approach- Companding transform
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Size: 278528 |
Author: 葛棋棋 |
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Description: 符号定时，求得单个OFDM符号的开始和结束的精确时刻通过计算接收信号和已互参考的相关系数实现。-Symbol timing to obtain a single OFDM symbol of the beginning and end of the precise moment by calculating the received signal and each reference to realize the correlation coefficient.
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Size: 1024 |
Author: 李贞铭 |
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Description: ofdm整个系统的详细仿真，内含误码率计算，输入输出信号频谱比较，星座点的分布-OFDM detailed simulation of the entire system, including bit error rate calculation, input and output signal spectrum of comparison, the distribution of constellation points
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Size: 12288 |
Author: jackie |
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Description: 基本说明了OFDM在MATLAB的系统仿真过程，详细说明了OFDM信号的产生过程。-Basic description of the OFDM System Simulation in MATLAB process, described in detail the process for selecting the OFDM signal.
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Size: 2048 |
Author: 段再超 |
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Description: OFDM信号及其频谱的matlab仿真源代码，输入信号为随机产生的二进制序列并插入了保护间隔-OFDM signal and its spectrum simulation matlab source code, the input signal for randomly generated binary sequence and insert a guard interval
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Size: 4096 |
Author: 优优 |
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Description: 本文首先概述了OFDM 的原理、特征和关键技术，介绍了系统需要的几种同步。然后就同步误差对系统性能的影响进行了简单的分析，表明定时偏差和采样频率偏差将会引入码间干扰，载波频率偏差导致载波间干扰的发生。因此，在OFDM系统接收机中定时的确定、载波频率偏差和采样频率偏差的纠正是信号恢复的关键。之后对OFDM系统同步的几种实现方法进行了介绍，分析了各同步方法的性能。-The paper first outlines the principles of OFDM, features and key technologies, the system needs to introduce several synchronization. Synchronization error and then the impact on system performance for a simple analysis, show that the timing deviation and the sampling frequency deviation will introduce inter-symbol interference, the carrier frequency deviation led to the occurrence of ICI. Therefore, in OFDM system receiver to determine the timing, carrier frequency offset and sampling frequency offset correction signal to restore the key. After the OFDM system to achieve synchronization of several methods of introduction, an analysis of the performance of the synchronization method.
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Size: 268288 |
Author: dajinyu |
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Description: 正交频分复用的调制解调：实现了mb-ofdm的基带超宽带信号调制解调-Orthogonal frequency division multiplexing of the modulation and demodulation: the mb-ofdm of base-band ultra-wideband signal modulation and demodulation
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Size: 2048 |
Author: qibo |
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Description: OFDM transmitter, including signal mapping for M-QAM and quantizer
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Size: 5120 |
Author: 簡銘成 |
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Description: OFDM程序，这么安排矩阵的目的是为了构造共轭对称矩阵
共轭对称矩阵的特点是 在ifft/fft的矢量上 N点的矢量
在0，N/2点必须是实数 一般选为0
1至N/2点 与 （N/2）+1至N-1点关于N/2共轭对称- BPSK simulation using a carrier cosine wave with ISI
clc
close all
clear all
figure(1)
n=160
for i=1:n
data(i)= 2*round(rand)-1
end
create modulated BPSK signal
first expand the bit stream
exdata=[]
for i=1:length(data)
for rep=1:5
exdata= [exdata data(i)]
end
end
ts=.1
t=1:ts:80.9
carrier=cos(pi*t)
multiply expanded bitstream by cosine wave with carrier frequency
this is the BPSK that is to be transmitted over the channel
bpsk=carrier.*exdata
bpsk=[bpsk(length(bpsk)-1) bpsk(length(bpsk)) bpsk]
plot(bpsk)
generating the noise
p=rand(1,800)*2*pi
p=rand*2*pi
snr=10
r=sqrt(-1*(1/snr*log(1- rand)))
no = 5*(r.* exp(j*p))
no = (r.* exp(j*p))
value of alpha
al=rand+j*rand
al=1
Spreading channel with the alpha as the variable
for k=5:5:795
for l = 1:5
al=round(rand)+j*round(rand)
rec(k+l)=bpsk(k+l)+al*bpsk(k-5+l)
end
end
rxdata=rec+ no
begin demodulation
first multiply recie
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Size: 6146048 |
Author: 卞敏捷 |
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Description: 本文在分析移动无线信道衰落特性的基础上,阐述了OFDM系统的基本原理,主要研究了OFDM通信系统中的基于导频符号的信道估计问题,分析了几种经典的信道估计算法以及相关的关键技术环节。 在此基础上介绍了OFDM技术在现实中的一个应用——WLAN IEEE802.11a系统模型,利用Matlab仿真软件完成OFDM系统信号生成、噪声生成、导频插入、循环前缀、调制、解调等部分的设计,最后结合计算机仿真对系统关键技术(导频、循环前缀、估计算法)的有效性和可行性进行了全面的分析与比较。适合matlab研究-Based on the analysis of mobile channel fading characteristics based on the OFDM system on the basic principles of research in the OFDM communication system of the pilot symbols based on channel estimation problem, an analysis of several classical channel estimation algorithm and the associated key technical links. On this basis, introduced OFDM technology in a practical application- WLAN IEEE802.11a system model, using Matlab simulation software to complete OFDM signal generation, noise generation, pilot insertion, cyclic prefix, modulation, demodulation and other parts of the design, the final combination of computer simulation of the system of key technologies (pilots, cyclic prefix, it is estimated that algorithm) the effectiveness and feasibility of a comprehensive analysis and comparison. Suitable for research matlab
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Size: 1339392 |
Author: 赵洪森 |
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Description: OFDM信号在光纤无线通信系统中传输性能的研究，包括不同频率的4QAM、16QAM，是毕设资料，非常珍贵。-OFDM signal in optical wireless communication system transmission performance in the study, including different frequencies 4QAM, 16QAM, complete set of information is very valuable.
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Size: 105472 |
Author: Ruby |
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Description: OFDM technique, signal OFDm, ofdm channel
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Size: 381952 |
Author: Septi
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