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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
uwb_Figure
- This guide in matlab that get cm1-cm9 channel model and plot 7 figure such as power delay profile,excess delay, etc. -This is guide in matlab that get cm1-cm9 channel model and plot 7 figure such as power delay profile,excess delay, etc.
threeway
- 对3条固定路径的AWGN多径信道中的QPSK系统进行BER性能仿真(不同p和delay 的取值来分别定义莱斯(瑞利)平坦衰落信道、莱斯(瑞利)频率选择性衰落信道).-For three fixed-path multipath AWGN channel of the QPSK system BER performance simulation (different values for p and the delay are defined Rice (Rayleigh) flat fading
datalink-selective 数据链路层—选择性重传协议
- 数据链路层的选择性重传协议的编写。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-The data link layer selective retransmission protocol preparation. In the simulation environment, programming environment,
crosscorr
- 此程序用来进行信道延迟,和序列互相关的。-This procedure used for channel delay, and the sequence of inter-related.
tgn_channel
- TGN五类信道的建模,包括了抽头时延,抽头功率,多普勒频移参数的建模。-TGN five-channel model, including a tap delay, tap power, Doppler frequency shift of the modeling parameters.
ofdm-siso
- 正交频分复用是一种多载波宽带数字调制技术。相比一般的数字通信系统, 它具有频带利用率高和抗多径干扰能力强等优点,因而适合于高速率的无线通信系统。- OFDM Simulator -------------------------------------------------------------------------------- MIMO OFDM Simulator: OFDM.m: OFDM Simulator (out
TimeDynamicChannelModel
- Study about modeling a channel using tap delay
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
capacitymimo
- This paper deals with the capacity behavior of wireless Orthogonal Frequency Division Multiplexing (OFDM)-based spatial multiplexing system when considering realistic channel delay profiles. In both the SISO and the MIMO contexts, we compare the
jakes_model
- 使用Jakes所假设的模型,用来产生信道抽头延迟线模型中的抽头增益过程所需的多普勒频谱成形滤波器有多种实现方法。时域FIR滤波器是最常用的一种实现方法。-Assumed the use of Jakes model, used to generate the channel-tap-tap delay line model of the process gain the necessary Doppler spectrum shaping filter has a variety of impl
multipathrayleigh
- 自己编写的关于MIMO 的瑞利衰落信道仿真程序延时为1 2 4-I have written on the MIMO Rayleigh fading channel simulation program delay for the 124
underwter
- 讲述浅海水声信道下的多途时延估计方法,供声学方向的学生学习参考-About the shallow water acoustic channel under the multi-path delay estimation method for the acoustic direction of student learning reference
channel
- FIR model to use for the multipath delay. e.g. Multi=[1 0 0 0 0.5], has the direct signal at time 0, and a single reflection of 50 strength of the direct signal at a delay of 4 samples. MISC: 1. Over-Sampling: This sets the am
Codes
- The main code is called "comparison of equalization schemes". It uses functions, defined seperately to compute the bit error rate for different typs of equalizers. That means times domain equalizer (TDE) with minimum mean square (MMSE) and zero
IEEE_UWB_recommend_matlab-simulation
- 该压缩包包括两个m文件,一个为IEEE推荐的UWB信道模型的matlab仿真程序,另一个为对应的RMS时延扩展计算,并附带了一个文档文件作说明。-The archive includes two m files, one for the IEEE UWB channel model recommended by the matlab simulation program, and the other for the corresponding calculation of RMS delay s
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
performanceimprovementwithpredictivechannelselecti
- 基于信道的历史信息来预测不同信道的未来可用时间可以帮助CR选择一个最佳信道进行信息传递。不同的预测准则应用到周期或是随机的开关模式中。一个CR可以学习以往不同信道的模式。我们提出一个简单的分类和学习方法去检测模式的类型和收集需要的信息用于智能信道的选择。MATLAB仿真结果显示提出的方案在随机信道的随机和周期模式中都有优越的表现。随着时间的变化,新到的切换次数减少到55 ,并且延迟时间也相应减少,而吞吐量却在提高。-Prediction of future availability times
freqBlind-Em
- 文章根据频率选择性衰落信道的抽头延迟线模型,将针对平坦衰落信道的CS(周期平稳过程理论)频偏盲估计 算法扩展到了频率选择性衰落信道,并通过仿真证明这种扩展是可行的.仿真结果还表明CS算法不仅有好的抗平 坦衰落能力,而且有很好的杭频率选择性衰落性能.-Article according to frequency selective fading channel tap delay line model, the flat fading channel for CS (cycle stati
3.5GHz--channel-measurements
- 在3.49-3.51GHZ频段内的典型中国城市环境下,地面信号衰落仍服从经典的指数对数分布。在中度误差(σx =10.291)下,路损指数在3.1-3.7之间。半径2公里的小区内,RMS时延在3-4微秒之间;典型的办公室环境中,存在直达径时RMS时延小于0.1微秒。在城市环境中,多径现象很明显,主要由高层建筑物引起,并以簇的方式存在。在城市中低速移动条件下(接收机移动速度小于100 Km/h)某一强径的生存时间通常超过10分钟,但相对到达时间会发生滑动。单一小区内的传播环境具有一定相关性,如果存