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Description: 多径信道和多普勒频移建模的说明，和matlab程序仿真-Multipath channel and Doppler shift modeling description and simulation matlab program
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Size: 1138688 |
Author: 娄小海 |
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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
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Size: 345088 |
Author: 杨佳琳 |
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Description: Correlated Rayleigh fading channel generator based on Doppler filter
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Size: 1024 |
Author: sheryl |
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Description: 对EBPSK(Extended binary phase shift keying)调制雷达系统的特点，本文将其与传统的LFM(Linear frequency modulation)雷达系统进行综合性能比较。-he overall performances of EBPSK(Extended binary phase shift keying) modulation and LFM(Linear frequency modulation) radar systems are compared. First, the target detection performance base on CFAR(Constant False Alarm Rate) of two systems are analyzed under several conditions. As the time-delay is relatively large, the detection performance of EBPSK modulation radar system is better than LFM radar system. EBPSK modulation signals can combat the effect of Doppler spread on system performance in HF(High Frequency) channel.
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Size: 6144 |
Author: shell |
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Description: Doppler filter to simulate movements in wireless channel
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Size: 1024 |
Author: dmm_mat |
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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: 简化的OFDM系统仿真，其中暂未考虑扰码和卷积码，物理层参数采用802.11a参数，1个长训练符号与6个OFDM数据符号构成1帧，信道为单径rayleigh衰落信道，其中最大多普勒频移为100Hz，信噪比0-30dB，调制方式为QPSK和16-QAM。-Simplified OFDM system simulation, which yet consider scrambling and convolution codes, physical layer parameters using 802.11a parameters, a long training symbols and six OFDM data symbols constitute a channel for single-path rayleigh fading channel, one of the largest Doppler shift is 100Hz, the SNR 0-30dB, the modulation scheme is QPSK and 16-QAM.
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Size: 3072 |
Author: PengJ |
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Description: 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。-Simulink tools to write code (S-Function mode) to generate a single path Rayleigh channel, the Doppler spectrum
For the classical spectrum, where the rate of movement of 120km/h.
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Size: 9216 |
Author: 刘龙 |
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Description: WIMAX_WZ_withencoding:信道估计，相位噪声补偿，频偏估计，编解码都有
WIMAX_WZ_withoutencoding：在上面的工程基础上，去掉编解码部分
WIMAX_WZ_withoutprocessing：在上面的工程基础上，再去掉相位噪声补偿，频偏估计
WIMAX_WZ_withoutprocessing2：在上面的工程基础上，改用新的前导和导频联合信道估计方案,参考文档《基于802_16d标准的OFDM信道估计技术的研究与实现.kdh》
因为白噪声信道仿真只能体现QPSK调制和RS-CC编码的性能，需要仿真SNR可控的SUI信道，来估计信道均衡的性能。
在多普勒频偏fd>100Hz时，联合信道估计性能才比前导估计强，否则前导估计性能更优。对于600MHz中心频率，要求收发机相对运动速度大于180km/h，这种情况出现的概率不大-WIMAX_WZ_withencoding: channel estimation, phase noise compensation, frequency estimation, the codec has WIMAX_WZ_withoutencoding: the project on the basis of the above, remove the codec section WIMAX_WZ_withoutprocessing: the project on the basis of the above, then remove the phase noise compensation, offset estimation WIMAX_WZ_withoutprocessing2: In the project on the basis of the above, use the new leader and pilot joint channel estimation scheme, the document " Standards-based 802_16d OFDM channel estimation and implementation of technology .kdh" because white noise channel simulation only reflects the QPSK modulation and RS-CC coding performance requires simulation SNR controllable SUI channel, to estimate the performance of channel equalization. When Doppler shift fd> 100Hz, joint channel estimation performance was stronger than the leading estimate, otherwise better estimation performance leader. For 600MHz center frequency transceiver requirements relative velocity
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Size: 40960 |
Author: 陈茂 |
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Description: 此程序包含多普勒功率谱，瑞利衰落信道，pdf概率密度等的仿真，且能出图-This program contains a Doppler power spectrum, Rayleigh fading channel simulation, pdf probability density, and can plot
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Size: 1024 |
Author: 田飞龙 |
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Description: 此程序是用jakes法产生的瑞利衰落信道，程序内包含多普勒功率谱程序，瑞丽衰落程序，概率密度pdf程序。能出图，且压缩包内有仿真图。-This program is Rayleigh fading channel generated by jakes law, within the program that contains the Doppler power spectrum program, Ruili fading program, the probability density pdf program. Can a map, and packed package simulation map.
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Size: 46080 |
Author: 田飞龙 |
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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: 对统计MIMO 雷达提出了一种映
射搜索配对法来实现在不同观测通道中的目标距离延时和多普勒频率估计值的配对-To propose a statistical MIMO radar mapping
Radio search pairing method implemented in different target distances observation channel delay and Doppler frequency estimates pairing
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Size: 384000 |
Author: 言午 |
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Description: We propose a compressive method for tracking doubly selective
channels within multicarrier systems, including OFDMsystems. Using
the recently introduced concept of modified compressed sensing
(MOD-CS), the sequential delay-Doppler sparsity of the channel is
exploited to improve estimation performance through a recursive estimation
mode. The proposed compressive channel tracking algorithm
uses a MOD-CS version of OMP with reduced complexity.
Simulation results demonstrate substantial performance gains over
conventional compressive channel estimation
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Size: 309248 |
Author: liying |
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Description: 移动台速度不同时，产生多普勒频移，瑞利衰落信道的仿真结果分析-Simulation results of the Doppler shift and Rayleigh fading channel are analyzed in the mobile station.
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Size: 1024 |
Author: 王强 |
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Description: 仿真程序共分5个模块：
1.平坦衰落信道仿真
2.LCR法仿真
3.COV法仿真
4.信号功率谱估计
5.高阶谱矩法仿真
经典的多普勒估计算法-The simulation program is divided into five modules: 1. flat fading channel simulation simulation simulation method 2.LCR signal power spectrum estimation 4. 5. higher order spectral moment method simulation classic 3.COV law Doppler estimation algorithm
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Size: 1447936 |
Author: sunjoy |
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Description: 毕设的题目，LTE无线信道建模，通过MATLAB仿真了包括多径信道，考虑了多普勒频移以及瑞利信道，考虑了temp参数以及temp1衰落的多参数信道模型，调试正常。
-Complete set of topics, LTE channel modeling, simulation by MATLAB, including multipath channel, taking into account the Doppler shift and Rayleigh channel, considering the temp parameter and multi-parameter temp1 fading channel model, debugging normal.
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Size: 6144 |
Author: nnp3pg |
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Description: 毕设的题目，LTE无线信道建模，通过MATLAB仿真了包括多径信道，考虑了多普勒频移以及瑞利信道，考虑了 drhFDt参数以及 upALndi衰落的多参数信道模型，调试正常。?-Complete set of topics, LTE channel modeling, simulation by MATLAB, including multipath channel, taking into account the Doppler shift and Rayleigh channel, considering the drhFDt parameter and multi-parameter upALndi fading channel model, debugging normal.
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Size: 6144 |
Author: 96x1yz |
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Description: 毕设的题目，LTE无线信道建模，通过MATLAB仿真了包括多径信道，考虑了多普勒频移以及瑞利信道，考虑了 YWZPdT参数以及 RSBqbGR衰落的多参数信道模型，调试正常。?-Complete set of topics, LTE channel modeling, simulation by MATLAB, including multipath channel, taking into account the Doppler shift and Rayleigh channel, considering the YWZPdT parameter and multi-parameter RSBqbGR fading channel model, debugging normal.
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Size: 5120 |
Author: 8xh5dh |
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