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dfsdfgsdtgregdfs
- OFDM程序 波形如下 子载波数 128 % 位数/ 符号 2 % 符号数/ 载波 100 % 训练符号数 0 % 循环前缀长度 8 (1/16)*T % 调制方式 4-QAM % 多径信道数 3 %IFFT Size 128 % 信道最大时延 2-OFDM waveform procedures following subcarriers median number of 128% / 2% Symbol Symbol / Carrier 100% Tr
Fdm
- 通信时常采用的信道复用技术包括频分复用、时分复用和统计时分复用。本代码测试了在一定环境下采用频分复用技术带来的网络时延。-Communication channel multiplexing is often used, including frequency division multiplexing, time division multiplexing and statistical time division multiplexing. The code is tested in cer
OFDMQAM
- 子载波数 128 位数/ 符号 2 符号数/ 载波 1000 训练符号数 0 循环前缀长度 8 (1/16)*T 调制方式 4-QAM 多径信道数 3 IFFT Size 128 信道最大时延 2 -Subcarriers median number of 128 percent/2 percent symbol symbol number/carrier training symbols 1000 a few 0 cyclic pre
zishiyin
- 1.设计自适应信号分离器,用以从白噪声中提取周期信号。其中选取正弦信号s=sin(2*pi*t/10)为周期信号,宽带噪声信号为高斯白噪声,设置参考通道延迟为50。 2.宽带信号中的窄带干扰抑制实际上是自适应信号分离的一种应用,借助自适应信号分离器可以方便的实现窄带干扰的对消。-1. Design of adaptive signal separator, used to extract from the white noise periodic signal. The extraction
pilotbasedchannelestimatininOFDMsystems
- 频域不同导频密度的信道估计在被研究,并且在高低时延信道其信道估计被固定了导频分配时域。频域信道估计是基于插补,多项式的广义线性模型(或最小二乘法)和维纳滤波(或线性最小均方误差法)的方法。时域的信道估计是用线性插补完成的。我们通过测量在基于克拉克散射模型的瑞利衰落信道上并带有QPSK调制的粗误码率,已经比较了所有这些方案的结果。-Different pilot density in frequency domain channel estimate to research, and its hi
dsss_signal_detection_and_parament_estimate
- 自相关检测方法是利用信号和噪声在相关域上的差别来构造检测器的。自相关检测是将信号与自身延迟一个时延后的信号作相关处理,或用双通道接收机的输出进行相关,得到扩频信号的自相关函数-Auto-correlation detection method is the use of signal and noise in the relevant field to construct the difference detector. Autocorrelation test is a time delay
juanji
- 卷积码将k个信息比特编成n个比特,但k和n通常很小,特别适合以串行形式进行传输,时延小。是 信道编码的一种-Convolutional codes will be compiled into n k-bit of information bits, but the k and n is usually small, especially for transmission in serial form, delay small. Is a channel coding
Phw22rara
- 编程与开发测试并行平台MPI层的带宽与延迟:单向通信信时间简单易懂表示为:t=Latency+Message -Programming and development and testing parallel platforms MPI layer bandwidth and delay: the straightforward one-way communication channel time is expressed as: t = Latency+ Message
Rayleigh_ofdm
- OFDM通过瑞丽信道的仿真,在载波数为200,驯良符号数为5,调制方式为QAM-Simulations about OFDM pilots go through the rayleigh channel,that is subcarriers:200,training blocks:5,modulation:QAM,channel delay:5s,simulation condition:synchronise strictly
Lab1-Windows1
- 利用所学数据链路层原理,自己设计一个滑动窗口协议,在仿真环境下编程实现有噪音信道环境下两站点之间无差错双工通信。信道模型为8000bps全双工卫星信道,信道传播时延270毫秒,信道误码率为10-5,信道提供字节流传输服务,网络层分组长度固定为256字节。 通过该实验,进一步巩固和深刻理解数据链路层误码检测的CRC校验技术,以及滑动窗口的工作机理。滑动窗口机制的两个主要目标:(1) 实现有噪音信道环境下的无差错传输 (2)充分利用传输信道的带宽。在程序能够稳定运行并成功实现第一个目标之后,运
blind
- 实现信号处理中QAM调制、过信道、解调部分。其中QAM调制部分可改符号点数,M阶数,信道加高斯白噪声、时延、多径,调制解调均有星座图。通过本代码,可学习QAM调制解调,或者通信系统的知识。-To achieve QAM modulation, signal processing over channel, a demodulation section. QAM modulation section can be changed symbolic points M order channel ad
rake-recieve
- RAKE的概念是由R.Price和P.E.Green在1958年的《多径信道中的一种通信技术》一文中提出来的。Rake的中文意思是:耙子,表明瑞克接收的过程相当于用一个钉耙将各个多径信号“耙”出来,然后加以收集。通常接收的多径信号时延差很小且是随机的,叠加后的多径信号一般很难分离,而只有特定设计的信号才可以进行分离,这种信号即扩频信号。分离的手段是相关接收-RAKE concept put forward in 1958 " a multipath channel communicati
shiyan
- 信号进入信道,经过高斯噪声的干扰,经过QPSK调制以后的时延 -The signal enters the channel, after the interference of the Gaussian noise after a delay after the QPSK modulation
elias
- 从SCM信道中提取的简单的生成信道的方法,把延时值,波达角,波离角等固定-Simple method for generating channel extraction from SCM in the channel, the delay value, angle of arrival, departure angle fixed
delay
- 在多径信道的建模中,改步骤实现对各条信道进行延时,最后将所有信道的信号相加-In the multi-path channel modeling, change step to achieve the various channel delay, and finally adding the signals of all channels
delay_estimator_1
- 利用差拍法求宽带阵列通道延时,可用于宽带阵列通道延时测量以及校正。-Computing the channel delay of broadband array by using beat method, which can be used for wideband channel delay measurement and calibration.
delay_estimator_2
- 利用自相关法求宽带阵列通道延时,该方法简单实用。-Using the autocorrelation method for broadband array channel delay, the method is simple and practical.
code
- EEOTS algorithm In this paper We merge two unconnected concepts (i) Channel coding can be used to conserve energy by transmitting at reduced power levels over longer durations. (ii) Electro-chemical mechanisms in batteries allow them to recover
OFDM_xunhuanzixiangguang
- OFDM的自相关循环函数,信道模型为6径的瑞丽衰减信道,时延等都包括,循环自相关相关图,切面图等(其中蒙特卡洛仿真次可以任意修改,一般为200次)-OFDM cyclic autocorrelation function of the channel model is 6 diameter Ruili fading channel, delay and so include cyclic autocorrelation correlation diagram, Plan, etc. (inclu
channel_coeff
- mimo信道模型的相关mimo衰弱信道的产生-relative mimo delay channel
