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Description: Create a channel object that describes the channel that you want to use. A channel object is a type of MATLAB variable that contains information about the channel, such as the maximum Doppler shift.
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Size: 2048 |
Author: edward |
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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: 基于极大似然估计方法的多普勒额频移估计算法-Maximum likelihood estimation method based on the Doppler frequency shift estimation algorithm places
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Size: 3072 |
Author: 罗光友 |
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Description: 瑞利衰落在IT++上的仿真，多普勒频率为0.1- generate a correlated Rayleigh fading process with a normaized Doppler frequency equal to 0.1. The normalized Doppler is defined as the multiplication of the maximum Doppler frequency by the sampling time
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Size: 1024 |
Author: raven |
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Description: OFDM系统的最大似然同步（ML）算法的程序，信道模型为带有多普勒频移的瑞利衰落信道。-OFDM system maximum likelihood synchronization procedures (ML) algorithm, the channel model with the Doppler shift of the Rayleigh fading channel.
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Size: 1024 |
Author: zhangwei |
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Description: III. USAGE
There is a sample script in the simscript directory. You will need
this and the file "rice_table.txt".
You should be able to run the sample script "ricean-sample.tcl". This
is just a slightly modified version of the example script
wireless-simple-mac.tcl which is in the NS distribution.
Parameters for the Ricean Fading: The fading model is used to
modulate the output of a large-scale fading model. In this case, it
uses TwoRayGround as the large-scale model.
For the Ricean Fading model:
MaxVelocity : This parameter determines the doppler spectrum.
The value of this parameter is the maximum speed of any objects in the
environment (could be nodes). It is NOT the speed of the
nodes themselves. This parameter should be specified before LoadRiceFile
-III. USAGE
There is a sample script in the simscript directory. You will need
this and the file "rice_table.txt".
You should be able to run the sample script "ricean-sample.tcl". This
is just a slightly modified version of the example script
wireless-simple-mac.tcl which is in the NS distribution.
Parameters for the Ricean Fading: The fading model is used to
modulate the output of a large-scale fading model. In this case, it
uses TwoRayGround as the large-scale model.
For the Ricean Fading model:
MaxVelocity : This parameter determines the doppler spectrum.
The value of this parameter is the maximum speed of any objects in the
environment (could be nodes). It is NOT the speed of the
nodes themselves. This parameter should be specified before LoadRiceFile
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Size: 286720 |
Author: XAVI |
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Description: 主要内容有：雷达数据处理概述（包括研究目的、意义、历史和现状等），参数估计与线性滤波方法，非线性滤波方法，量测数据预处理技术，多目标跟踪中的航迹起始，极大似然类多目标数据互联方法，贝叶斯类多目标数据互联方法，机动目标跟踪，群目标跟踪，多目标跟踪终结理论与航迹管理，无源雷达数据处理，脉冲多普勒和相控阵雷达数据处理，雷达组网数据处理，雷达数据处理性能评估，雷达数据处理仿真技术，雷达数据处理的实际应用，以及关于雷达数据处理理论的回顾、建议与展望。-The main contents are: an overview of the radar data processing (including research purpose, meaning, history and current status, etc.), parameter estimation method with linear filtering, nonlinear filtering method, measurement data preprocessing techniques, starting track multiple target tracking, maximum Likelihood class of multi-target data interconnection methods, Bayesian methods class multi-target data association, target tracking, target tracking group, multi-target tracking end theory and track management, passive radar data processing, pulsed Doppler and phased array radar data processing, radar network data processing, radar data processing performance evaluation, radar data processing simulation technology, the practical application of radar data processing, as well as a review on radar data processing theory, suggestions and prospects.
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Size: 6901760 |
Author: dabin |
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Description: Considered a 16QAM communication system. The information rate is 2 Mb/s and the
carrier frequency is 12 GHz. Assumed perfect synchronization.
a) Simulated the system if the channel is AWGN and draw bit error rate of the system
versus Eb/No. Compare the results with what you obtain in theory.
b) Considered (15,11) Hamming code. Apply this code into the above system.
Compare the results with what you obtain in theory.
c) Simulated uncoded system if we have a Doppler Spread due to mobile movement
in the channel. Simulate and draw the bit error rate of the system for maximum
mobile speed 42.3 Km/Hour. No equalizer is used in the system.
d) Applied coding of part (b) into the system of part (c). Simulate the system and
discuss the results.
e) Designed an interleaver for the system of part (d) to improve the coded performance
results. Simulated the system.
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Size: 1068032 |
Author: GURJOT SINGH |
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Description: A Maximum Likelihood Doppler Frequency
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Size: 304128 |
Author: li |
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Description: we present a new space–time block code for timeand frequency-selective (doubly-selective) channels. It can be interpreted
as the extension of the Alamouti code to doubly-selective channels, and relies on a joint time–frequency reversal of the transmitted sequences. Under
certain channel conditions, the proposed space–time block code belongs
to the class that achieves full spatial, delay, and Doppler diversity using a
maximum-likelihood (ML) receiver, as well as a linear zero-forcing (LZF)
or linear minimum mean-squared error (LMMSE) receiver. For realistic
doubly-selective channels, a real-valued linear data model is presented, for
which different receiver structures can be developed.
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Size: 1024 |
Author: phuong |
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Description: ns STBC for purely time-selective channels by transforming the
time-selective channels into frequency-selective channels, and by
adjusting existing space–time code designs over frequency-selective
MIMO channels to collect joint space–Doppler gains over purely
time-selective MIMO channels. Further, [14] uses the ideas of [12] to
develop a space–time code that can achieve full space-delay-Doppler
diversity for any number of transmit–receive antennas. However, to
quantify the maximum Doppler diversity order [2], the above papers
rely on a parsimonious critically sampled complex-exponential basis
expansion model (CCE-BEM) for the underlying purely time-selective
or doubly-selective channels [16]. However, the CCE-BEM may have
a large modeling error under certain channel conditions
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Size: 1024 |
Author: phuong |
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Description: 电网_LEO中低轨卫星多普勒随轨道高度和最大仰角的变化-LEO satellite doppler along with the change of rail height and maximum elevation
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Size: 2048 |
Author: xpudn60 |
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Description: This program computes the Gaussian power spectral density according to
given input values of maximum Doppler frequency f_max and variance
sigma_0^2. The equation of the Jakes power spectral density is given
in (3.26) [2]. A plot of the Gaussian PSD is shown in Figure 3.3.(a)
used m-file:
GaussianPSD(f_max,sigma02)
Explanation of the input parameters:
f_max: Maximum Doppler frequency
sigma02: Mean pow-This program computes the Gaussian power spectral density according to
given input values of maximum Doppler frequency f_max and variance
sigma_0^2. The equation of the Jakes power spectral density is given
in (3.26) [2]. A plot of the Gaussian PSD is shown in Figure 3.3.(a)
used m-file:
GaussianPSD(f_max,sigma02)
Explanation of the input parameters:
f_max: Maximum Doppler frequency
sigma02: Mean pow
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Size: 547840 |
Author: raushan |
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Description: Estimate maximum Doppler spread
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Size: 1024 |
Author: yijjjl |
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