Description: Believe propagation is a popular method to achieve combinatorial optimization. This program contains two sets of codes -- image restoration from noisy data and depth estimation from stereo images. Platform: |
Size: 284750 |
Author:Wenmiao Lu |
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Description: Believe propagation is a popular method to achieve combinatorial optimization. This program contains two sets of codes -- image restoration from noisy data and depth estimation from stereo images.-Believe propagation is a popular method to achieve combinatorial optimization. This program contains two sets of codes-- image restoration from noisy data and depth estimation from stereo images. Platform: |
Size: 284672 |
Author:Wenmiao Lu |
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Description: 利用belief propagation方法实现的模型优化和参数的估计-Ways to achieve the use of belief propagation model optimization and parameter estimation Platform: |
Size: 26624 |
Author:杨佳 |
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Description: The main reason for inaccuracies observed in location
estimation, imposed by the propagation conditions of the
wireless channel, is the Non Line Of Sight (NLOS) due to
transmitted signal blocking. Because of the NLOS, the first
TOA, which bears information related to the mobile
terminal position, suffers stronger attenuation than later
arrivals and therefore wrong timing information is
obtained yielding biased position estimation. Several
NLOS mitigation algorithms have been presented. One of
the most common approaches consists of correcting the
TOA measurements exploiting the fact that the variance of
the TOA measurements is significantly increased in NLOS
scenarios Platform: |
Size: 233472 |
Author:zhangjianrong |
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Description: 这个程序可以计算给定点处的小区信号范围覆盖。-is program computes a map of visibility from a selected point on a topography. It has been written to help the search for radio relay best location. Because it considers only direct line of sight, it gives a good estimation for possible radio link for short distances only (less than 10 km), neglecting curvature of the Earth, Fresnel zone and atmospheric refraction on radio waves propagation. The program computes the relative elevation angle of the mask for each point (the angle is null or negative if the point is visible).
The function needs a digital elevation model Z and associated (X,Y) vectors or matrices of coordinates (same unit as Z), position of the point (X0,Y0), the antenna height H0 (for instance 4 m), and the hypothetic antenna height Ha on each topography points (for instance 3 m). When no output argument is given, the function plots a map of the results (color map of mask angles, and blank for visible points, see example screenshot).
The script is not fully optimize Platform: |
Size: 434176 |
Author:ken |
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Description: An implementation of Unscented Kalman Filter for nonlinear state estimation.-Nonlinear state estimation is a challenge problem. The well-known Kalman Filter is only suitable for linear systems. The Extended Kalman Filter (EKF) has become a standarded formulation for nonlinear state estimation. However, it may cause significant error for highly nonlinear systems because of the propagation of uncertainty through the nonlinear system.
The Unscented Kalman Filter (UKF) is a novel development in the field. The idea is to produce several sampling points (Sigma points) around the current state estimate based on its covariance. Then, propagating these points through the nonlinear map to get more accurate estimation of the mean and covariance of the mapping results. In this way, it avoids the need to calculate the Jacobian, hence incurs only the similar computation load as the EKF.
For tutorial purpose, this code implements a simplified version of UKF formulation, where we assume both the process and measurement noises are additive to avoid augment of state and a Platform: |
Size: 2048 |
Author:DT丿灬雪狼 |
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Description: 主要探討發射端與接收端在各種環境的電波傳播數 據上去估測和分析涵蓋範圍-Focuses on the transmitter and receiver in a variety of radio wave propagation environment estimation and analysis of data coverage up Platform: |
Size: 1117184 |
Author:wangtang |
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Description: 被动声方位估计中消除有效声速影响的方法。基于声传播的平面波模型，采用向量分析方法导出了十字阵和正四面体
阵的测向公式，分析了两者在有效声速变化条件下不同的定位性能；结果表明，对正
四面体阵，采用合适的算式，可在方位估计中避开有效声速的影响。-Passive Acoustic Direction Estimation method to eliminate the effective speed of sound effect. Cross array and regular tetrahedron array finding formulas are derived based on the model of plane wave sound propagation vector analysis method, both the effective speed of sound changes under conditions different positioning performance The results showed that, of being tetrahedral array, using appropriate the formula, can avoid the effective speed of sound azimuth estimation. Platform: |
Size: 115712 |
Author:陶伟 |
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Description: 用 LDPC 解码法，对原始信号通道的噪声进行评估，消去。具体原理可参照IEEE TCOM的论文。-Channel Noise Estimation or correlation estimation for distributed source coding Using Particle based Belief Propagation for LDPC decoding in AWGN and BSC models.
This code is partially based on our published journal papers with some additional improvements. In this code, we removed the parameter \lambda to reduce the number of free parameters. PBP estimator is distributed in the hope that is will be useful, but without any warranty. The codes have not been optimized, so the estimation speed may be slow. To use PBP estimator source code in your research, please cite our journal papers published in IEEE TCOM.
Platform: |
Size: 397312 |
Author:林真天 |
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Description: 用多尺度卡尔曼滤波法，对信号参数进行识别估计。高频信号和低频信号识别结合起来改进了算法识别的精确度和准确度。-It is an implementation of hierarchical (a.k.a. multi-scale) Kalman filter using belief propagation. The model parameters are estimated by expectation maximization (EM) algorithm. In this implementation, we considered two time series with different frequencies. The messages between high and low frequency signals are combined to improve the estimation and prediction. Platform: |
Size: 311296 |
Author:林真天 |
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Description: 基于非线性动力系统的无迹卡尔曼滤波matlab程序-onlinear state estimation is a challenge problem. The well-known Kalman Filter is only suitable for linear systems.
The Extended Kalman Filter (EKF) has become a standarded formulation for nonlinear state estimation.
However, it may cause significant error for highly nonlinear systems because of the propagation of uncertainty through the nonlinear system.
The Unscented Kalman Filter (UKF) is a novel development in the field Platform: |
Size: 8192 |
Author:窦贤明 |
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Description: MIMO-OFDM wireless communications with matlab 例程。包含propagation and fading、SISO channel models、MIMO Channel models、intorduction to ofdm、 synchronization for ofdm、channel estimation、Papr reduction、inter-cell interference mitigation techniques MIMO channel capacity,attenna diversty and space-time coding techniques, signal detection for spatially multiplexed mimo systems, exploitingchannel state information at the transmitter side, multi-user MIMO-MIMO-OFDM wireless communications with matlab routines. Includes propagation and fading, SISO channel models, MIMO Channel models, intorduction to ofdm, synchronization for ofdm, channel estimation, Papr reduction, inter-cell interference mitigation techniques MIMO channel capacity, attenna diversty and space-time coding techniques, signal detection for spatially multiplexed mimo systems, exploitingchannel state information at the transmitter side, multi-user MIMO Platform: |
Size: 801792 |
Author:吴世锋 |
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Description: 波达方向（Direction Of Arrival）估计，又称为谱估计（spectral estimation）、波达角（Angle Of Arrival）估计。一个信源有很多可能的传播路径和到达角。如果几个发射机同时工作，每个信源在接收机处形成潜在的多径分量。因此，接收天线能估计出这些到达角就显得很重要，目的是破译出哪个发射机在工作以及发射机所处的可能位置。通过测量辐射信号的波达方向（DOA全称Direction Of Arrival）或波达角（AOA）来估测辐射源的位置。理论上这种估计只需要两个接收阵元就可以确定辐射源的位置，但在实际中，由于受到角度分辨率、多径和噪声限制，所需阵元通常要多于两个。DOA定位技术原理是利用接收机处的阵列天线和波达方向（DOA）估计技术来确定一个从接收机到信源的波达方向线，即为方向线（LOB），最后利用多个接收机估计的DOA进行三角测量，方向线的交点就是信源的估计位置。-DOA (Direction Of Arrival) estimation , also known as spectral estimation (spectral estimation), angle of arrival (Angle Of Arrival) estimation. There are many possible sources a propagation path and the angle of arrival . If several transmitters simultaneously, a potential source for each multipath component at the receiver. Therefore, the receiving antenna can estimate the angle of arrival becomes very important, which aims to decipher the location of the transmitter at work as well as possible in which the transmitter . By measuring the radiation signal DOA (DOA stands for Direction Of Arrival) or the angle of arrival (AOA) to estimate the location of the radiation source . Theoretically this estimate requires only two receiving array element can determine the position of the radiation source , but in practice , due to the angular resolution , multipath and noise limits , usually required more than two array elements . DOA positioning technology is the use of an array of antennas at Platform: |
Size: 1024 |
Author:宇哥 |
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Description: 对于城市环境中的高精度单频 GNSS 接收机而言，若考虑误差预报处理已抵消电离层误差，则地面传播环境所导致的多径效应将成为系统误差的主要因素。基于现有蜂窝通信的高分辨率信道估计结果，针对电波传播的幅度、相位、多普勒等特征提取信道响应函数，在极小误差范围内提供至 L 波段信号的线性特征映射-For multipath effects in urban environments with high accuracy single-frequency GNSS receiver, the forecast error handling when considering the ionosphere has been offset error, the ground caused by the propagation environment will be a major factor in system errors. High-resolution channel estimation based on the results of existing cellular communications, the channel response function for extracting the magnitude of wave propagation, phase, Doppler and other features, provided to the L-band signals in a very small error range of linear feature mapping Platform: |
Size: 345088 |
Author:杨佳琳 |
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Description: 由地面效应反转和一个单一的垂直阵列源距离和高度确定
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matlab文件的集合来确定与一个单一的垂直阵列的来源范围，并高度。
使用一个分析传播模型来计算上述的阻抗平面的声场。
用途要么转向响应功率（SRP）与Barteltt或MUSIC波束形成器或幅度/相位差异
各麦克风之间。-Source distance and height determination by ground effect inversion and a single vertical array
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A collection of Matlab file to determine the source range and height with a single vertical array.
Uses an analytical propagation model to calculate the sound field above an impedance plane.
Uses either steered response power (SRP) with Barteltt or MUSIC beamformer or the magnitude/phase differences
between the microphones.
Position_Bartlett.m
Bartlett (delay-and-sum) based position estimation. Fixed grid search.
Position_Bartlett_CF.m
Bartlett (delay-and-sum) based position estimation. Adaptive grid search: Coarse-to-fine grid contraction.
Position_MUSIC.m
MUSIC (eigendecomposition of the covariance matrix) based position estimation. Fixed grid search.
Position_MUSIC_CF.m
MUSIC (eigendecomposition of the covariance matrix) based position estimation.
Adaptive grid s Platform: |
Size: 6144 |
Author:李云 |
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Description: 关于LTE的文章，希望大家喜欢。
Belief-propagation-based joint channel estimation and decoding for spectrally efficient communication over unknown sparse channels-Belief-propagation-based joint channel estimation and decoding for spectrally efficient communication over unknown sparse channels Platform: |
Size: 220160 |
Author:xiaozhang |
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Description: 具有丰富的参数选项,dfwiMXH参数双向PCS控制仿真，是一种双隐层反向传播神经网络，利用matlab GUI实现的串口编程例子，uqFVSRu条件现代信号处理中谱估计在matlab中的使用，实现了对10个数字音的识别程。- It has a wealth of parameter options, dfwiMXH parameter Two-way PCS control simulation, Is a two hidden layer back propagation neural network, Use serial programming examples matlab GUI implementation, uqFVSRu condition Modern signal processing used in the spectral estimation in matlab, Realization of 10 digital audio recognition progra. Platform: |
Size: 7168 |
Author:ccqcrf |
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Description: 是一种双隐层反向传播神经网络，UfxpUYO参数数学方法是部分子空间法，matlab程序运行时导入数据文件作为输入参数，粒子图像分割及匹配均为自行编制的子例程，anhZcNg条件对于初学者具有参考意义，现代信号处理中谱估计在matlab中的使用。- Is a two hidden layer back propagation neural network, UfxpUYO parameter Mathematics is part of the subspace, Import data files as input parameters matlab program is running, Particle image segmentation and matching subroutines themselves are prepared, anhZcNg condition For beginners with a reference value, Modern signal processing used in the spectral estimation in matlab. Platform: |
Size: 7168 |
Author:pqsefc |
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Description: 包括主成分分析、因子分析、贝叶斯分析，KHpFNCf参数包含收发两个客户端的链路级通信程序,使用混沌与分形分析的例程，是一种双隐层反向传播神经网络，JudwMrZ条件实现了对10个数字音的识别，现代信号处理中谱估计在matlab中的使用。- Including principal component analysis, factor analysis, Bayesian analysis, KHpFNCf parameter Contains two clients receive link-level communications program, Use Chaos and fractal analysis routines, Is a two hidden layer back propagation neural network, JudwMrZ condition To achieve the recognition of 10 digital sound, Modern signal processing used in the spectral estimation in matlab. Platform: |
Size: 7168 |
Author:rdwxhy |
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Description: n radio, multiple-input and multiple-output, or MIMO is a method for multiplying the capacity of a radio link using multiple transmit and receive antennas to exploit multipath propagation.[1] MIMO has become an essential element of wireless communication standards including IEEE 802.11n (Wi-Fi), IEEE 802.11ac (Wi-Fi) Platform: |
Size: 4096 |
Author:Abdolmaleki
|
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