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Description: 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 channel of the Doppler spectrum, please answer the following questions: (1) In some radio channels, the Doppler frequency shift will cause the output signal of the wireless channel aliasing. Please describe the aliasing produced a variety of reasons (2) wireless channel in the Doppler spectrum has a classical spectrum (classic spectrum), please explain the mechanism of produce such spectral shape (3), please use the Simulink tool to write code ( S-Function mode), resulting in a single-path Rayleigh channel, the Doppler spectrum for the classical spectrum, including mobile rate of 120km/h. And requested the answer: that they used computer-generated classical spectrum is the right possible way.
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Size: 31744 |
Author: Helen |
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Description: multipath channel model of the mobile radio channel with doppler effect
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Size: 1024 |
Author: erkkrz |
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Description: 利用Channel Equalizer公式與附件main.m等程式，並選擇Flat=0之模式(該模式為Frequency Selective Fading)及產生Doppler = 500 Hz之Rayleigh fading Channel，利用已知Channel Parameters (rcos, rsin) 增修接收機之Channel Equalizer程式-Channel Equalizer using the formula and accessories main.m other programs, and select the Flat = 0 of the mode (the mode for the Frequency Selective Fading) and generate Doppler = 500 Hz of the Rayleigh fading Channel, the use of a known Channel Parameters (rcos, rsin) Upgrading receiver of the Channel Equalizer program
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Size: 5120 |
Author: Jason |
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Description: 参数时变信道的频率选择性和时变性。BPSK符号率＝512b/s，采样率＝16个采样/s，a1(t) 和a2(t) 为多普勒带宽＝16Hz。结果为符号间干扰。-Parameters of time-varying channel frequency selectivity and time-variant. BPSK Symbol Rate = 512b/s, sampling rate = 16 samples/s, a1 (t) and a2 (t) as the Doppler bandwidth = 16Hz. The results for the inter-symbol interference.
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Size: 2048 |
Author: minmin |
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Description: This examples corresponds to a 2x2 system with parallel linear arrays, where the mobile moves aways from the base station,
with a constant speed such that the Maximum Doppler frequency is 5 Hz. The element spacings at the base station and mobile are one lambda and 0.5 lambda, respectively. The maximum angle spread at the base station is 4 degrees, whereas isotropic scattering is assumed around the mobile. The length of the simulated MIMO channel is 5 seconds, and any two adjacent samples are spaced by 0.01 seconds. For ensemble averaging, 90 realizations of the MIMO channel are generated.-This examples corresponds to a 2x2 system with parallel linear arrays, where the mobile moves aways from the base station, with a constant speed such that the Maximum Doppler frequency is 5 Hz. The element spacings at the base station and mobile are one lambda and 0.5 lambda, respectively. The maximum angle spread at the base station is 4 degrees, whereas isotropic scattering is assumed around the mobile. The length of the simulated MIMO channel is 5 seconds, and any two adjacent samples are spaced by 0.01 seconds. For ensemble averaging , 90 realizations of the MIMO channel are generated.
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Size: 690176 |
Author: jerry |
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Description: 基于Matlab的移动通信中多径衰落信道的仿真\基于多径传输和多普勒频移的 瑞利（Rayleigh）信道的仿真 主要考虑不同条件下的仿真-Matlab-based mobile communications in the multipath fading channel simulation \ based multi-path transmission and Doppler frequency shift of the Rayleigh (Rayleigh) channel simulation the main consideration of the simulation under different conditions
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Size: 120832 |
Author: 王明 |
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Description: 对ofdm系统进行信道估计，特别是对时变信道，受多径和多普勒影响严重的系统，算法收敛性很好-Ofdm system for channel estimation, especially for time-varying channel, affected by severe multipath and Doppler system is very good convergence
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Size: 303104 |
Author: 施政 |
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Description: 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 120km/h, with the classical theoretical description of Doppler spectrum
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Size: 47104 |
Author: ailiu |
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Description: 瑞利无线通信信道建模，包括多径和多普勒频移-doppler affect the rayleigh channel
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Size: 9216 |
Author: wuliqiao |
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Description: 自己编的瑞利信道模型和它的概率密度函数，初学者看很好-Own series of Rayleigh channel model and its probability density function, look very good for beginners
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Size: 1024 |
Author: huanghao |
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Description: 卫星移动通信的信道特点及仿真模型，多径效应，多普勒效应-Mobile satellite communication channel characteristics and simulation models, multipath effect, Doppler effect
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Size: 106496 |
Author: rock |
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Description: 使用matlab编写的瑞利信道的仿真，使用了simulink，在多普勒经典谱-Write the Rayleigh channel using matlab simulation, using simulink, in the classical Doppler spectrum
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Size: 57344 |
Author: pengpeng |
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Description: 基于Matlab的移动通信中多径衰落信道的仿真\基于多径传输和多普勒频移的 瑞利（Rayleigh）信道的仿真 主要考虑不同条件下的仿真-Matlab-based mobile communications in the multipath fading channel simulation \ based multi-path transmission and Doppler frequency shift of the Rayleigh (Rayleigh) channel simulation the main consideration of the simulation under different conditions
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Size: 1024 |
Author: |
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Description: 相关瑞利信道的仿真，在不同多普勒波长的影响下，产生出不同的瑞利信道-simullation of correlated rayleigh channel，in different lenght of doppler
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Size: 4096 |
Author: Emma |
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Description: 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的原因；无线信道中的多普勒谱有一种经典谱(classic spectrum)产生的机理；-In some wireless channel, the reason of Doppler frequency shift causing aliasing Doppler spectrum in the wireless channel, the mechanism of Generating a classical spectrum (classic spectrum)
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Size: 23552 |
Author: 梁赛赛 |
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Description: 衰落信道仿真
function r = rayleigh( fd, fs, Ns )
r = rayleigh(fd,fs,N)
A Rayleigh fading simulator based on Clarke s Model
Creates a Rayleigh random process with PSD determined
by the vehicle s speed.
INPUTS:
fd = doppler frequency
set fd = v*cos(theta)/lambda
v = velocity (meters per second)
lambda = carrier wavelength (meters)
theta = angle w/ respect to tangent (radians).
fs = sample frequency (Samples per second)
Ns = number of samples of the Rayleigh fading
process to produce
OUTPUTS:
r = row vector containing Ns samples of the Rayleigh
fading process
Author: Matthew C. Valenti
Mobile and Portable Radio Research Group
Virginia Tech
For Academic Use Only-Fading channel simulation
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Size: 3072 |
Author: zhouyi |
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Description: 基于多径传输和多普勒频移的瑞利信道的仿真，matlab环境下的仿真
u1.m
u2.m
u3.m
u4.m
u5.m
u6.m
u7.m
基于多径传输和多普勒频移的.doc
-Based on the multi-path transmission and Doppler frequency shift of the Rayleigh (Rayleigh) channel simulation
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Size: 120832 |
Author: zhouyi |
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Description: MIMO-OFDM基于卡拉曼滤波的信道估计算法，附带多普勒信道建模和算法程序-MIMO-OFDM Karaman filtering based channel estimation algorithm, incidental the Doppler channel modeling and algorithm
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Size: 10240 |
Author: tianwei |
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Description: (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。并请描述：自己用计算机产生的经典谱是正确的依据。-(3) with Simulink tools to write code (S-Function mode), to produce a single path Rayleigh channel Doppler spectrum is the classical spectrum, in which the moving speed of 120km/h. Please describe: the classic computer-generated spectrum is the correct basis.
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Size: 1916928 |
Author: 于素梅 |
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Description: 多普勒频移的代码，做信道特别是移动信道肯定会产生多普勒效应，信道代码-Doppler shift of the code, so the channel, especially mobile channel, it would certainly produce a Doppler effect, a channel code
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Size: 5120 |
Author: 华工大庆 |
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