Description: ：正交频分复用(OFDM)是第四代移动通信的核心技术。该文首先简要介绍了OFDM基本原理，重点研究了理想同步情
况下，保护时隙(cP)和不同的信道估计方法在高斯信道和多径瑞利衰落信道下对OFDM系统性能的影响。在给出OFDM系
统模型的基础上，用MATLAB语言实现了整个系统的计算机仿真并给出参考设计程序-: orthogonal frequency division multiplexing (OFDM) is the fourth-generation mobile communication core technology. The article briefly introduces the basic principles of OFDM, focus on the ideal synchronous circumstances, Protection slot (counted ac cording) and different channel estimation method in Gaussian channel and multi-path Rayleigh fading channels of OFDM system performance. OFDM system is the model on the basis of MATLAB language of the entire system is computer simulation and reference design process Platform: |
Size: 4714 |
Author:xoaxiao |
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Description: 利用matlab对空时编码的多天线系统中的alamouti空时编码进行了仿真，信道为瑞利衰落信道-Matlab using space-time coding on the multi-antenna system of space-time coding alamouti the simulation, channel for Rayleigh fading channels Platform: |
Size: 1024 |
Author:陈飞 |
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Description: OFDM/Simulink matlab procedure, at different signal to noise ratio, the system compares the SER and BER. The use of Rayleigh fading channel. Platform: |
Size: 10240 |
Author:falai |
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Description: the code uploaded is very useful in geretanig multipath rayleigh fading channel for ofdm system Platform: |
Size: 7168 |
Author:sridharkumar |
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Description: OFDM : Orthogonal Frequency Division Multiplexing (OFDM) is the fourth-generation mobile communication core technology. The article briefly introduces the basic principles of OFDM, focus on the ideal synchronous circumstances, Protection slot (counted ac cording) and different channel estimation method in Gaussian channel and multi-path Rayleigh fading channels of OFDM system performance Platform: |
Size: 1024 |
Author:kanniyappan/AIHT |
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Description: Though the total channel is a frequency selective channel, the channel experienced by each subcarrier in an OFDM system is a flat fading channel with each subcarrier experiencing independent Rayleigh fading. Platform: |
Size: 2048 |
Author:azer |
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Description: 这是一个在瑞利信道下，用训练符号进行信道估计的OFDM调制解调程序-This is a in Rayleigh fading, the training symbols to estimate the channel OFDM modulation and demodulation process Platform: |
Size: 9216 |
Author:田文杰 |
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Description: 简要而又完整的OFDM系统仿真，文件中有仿真基于模拟调制的OFDM系统，也有仿真基于FFT变换的OFDM系统，还给了完整的基于IEEE 802.11a标准的OFDM系统仿真，并且分析了单径和多径瑞利衰落信道下的误码性能-Brief but complete OFDM system simulation file OFDM system simulation based on analog modulation, OFDM system simulation based on the FFT, and gave a complete OFDM system simulation based on the IEEE 802.11a standard, and the analysis of single-path and BER performance in multipath Rayleigh fading channel Platform: |
Size: 6144 |
Author:robort |
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Description: ML detection for mimo ofdm
Script for computing the BER for BPSK modulation in a
Rayleigh fading channel with 2 Tx, 2Rx MIMO channel
Maximum Likelihood equalization
-ML detection for mimo ofdm
Script for computing the BER for BPSK modulation in a
Rayleigh fading channel with 2 Tx, 2Rx MIMO channel
Maximum Likelihood equalization
Platform: |
Size: 1024 |
Author:naima |
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Description: 在瑞利衰落信道下的OFDM系统仿真程序，得出信噪比与误码率的相关结果。-OFDM system simulation program in the Rayleigh fading channel, the results of the signal to noise ratio and bit error rate are obtained. Platform: |
Size: 2048 |
Author:蒲枭宇 |
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Description: 单径或多径瑞利衰落信道仿真，主同步信号PSS在时域上的相关仿真，MIMO OFDM matlab仿真。- Single path or multipath Rayleigh fading channel simulation, PSS primary synchronization signal in the time domain simulation related, MIMO OFDM matlab simulation. Platform: |
Size: 6144 |
Author:王小才 |
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Description: method based on Neural
Network (NN) technique and accompanied with MMSE
(Minimum Mean Square Error), which corrects at the receiver
level, the Non-Linear (NL) distortions due to the HPA (High
Power Amplifier).-In this paper, we present a method based on Neural
Network (NN) technique and accompanied with MMSE
(Minimum Mean Square Error), which corrects at the receiver
level, the Non-Linear (NL) distortions due to the HPA (High
Power Amplifier). The neural network consists on a feedforward
Multi-Layer Perceptron (MLP) associated with
Levenberg-Marquardt learning algorithm. The results show
that the neural network compensator brings perceptible in a
complete VBLAST MIMO OFDM (Vertical Bell Laboratories
Layered Space-Time Multiple-Input Multiple-Output
Orthogonal Frequency Division Multiplexing) system running
under a Rayleigh fading channel. Platform: |
Size: 330752 |
Author:wangxx |
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Description: 在OFDM系统中的瑞利衰落信道分布，描述了信号进入信道前后的变化，误码率对比(The Rayleigh fading channel distribution in the OFDM system describes the change of the signal before and after the channel, the bit error rate comparison) Platform: |
Size: 225280 |
Author:泡芙的味道
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Description: 在OFDM系统中的瑞利衰落信道分布，描述了信号进入信道前后的变化(The Rayleigh fading channel distribution in the OFDM system describes the change of the signal before and after the channel, the bit error rate comparison) Platform: |
Size: 4096 |
Author:泡芙的味道
|
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Description: 在OFDM系统中的瑞利衰落信道分布，描述了信号进入信道前后的变化，误码率对比(The Rayleigh fading channel distribution in the OFDM system describes the change of the signal before and after the channel, the bit error rate comparison) Platform: |
Size: 2048 |
Author:泡芙的味道
|
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Description: 程序实现的主要功能：
OFDM调制识别：研究了基于高阶累量和基于小波变换的OFDM信号和单载波调制信号的识别算法，仿真分析了两种算法在高斯信道和多径瑞利衰落信道下的信号识别性能。
OFDM参数估计：研究了基于Welch算法和AR模型法求解功率谱进而估计信号带宽的算法，对两种算法的估计性能进行了比较；根据OFDM信号的循环平稳性研究了基于循环谱的载频估计算法；根据 OFDM信号的自相关性研究了基于可变延时自相关和固定延时自相关的FFT相结合的算法，估计了OFDM信号的有效数据长度、符号总长度、循环前缀长度和子载波间隔；最后研究了基于带宽和基于过采样估计子载波数目两种算法，并在高斯信道和多径瑞利衰落信道下对以上参数估计算法进行了仿真分析。
其中OFDM_DEMO为整个项目的程序入口，其余均为辅助函数，每一个函数均有参数注释和功能说明。(The main functions of the program are as follows:
OFDM modulation recognition: the recognition algorithms of OFDM signal and single carrier modulation signal based on high-order cumulant and wavelet transform are studied. The signal recognition performance of the two algorithms in Gaussian channel and multi-path Rayleigh fading channel is simulated and analyzed.) Platform: |
Size: 37888 |
Author:奥奥奥奥利奥 |
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Description: One of the major challenges which prevents the coordinated multipoint (CoMP) communications concept from being widely deployed in new cellular systems is timing synchronization. In order to achieve the gains promised by CoMP systems, the user equipments’ (UEs) signals in uplink (UL) or the base stations’ (BSs) signals in downlink (DL) should be synchronized such that the time difference of arrivals (TDOAs) do not exceed the cyclic prefix (CP) length of the transmitted signals; Otherwise the system suffers from unavoidable integer time offsets. These offsets lead to asynchronous interference in terms of inter-carrier, inter-block and inter-symbol interference (ISI). This limits the percentage of area within a cell which can be covered by cooperation and imposes an upper bound on this area. In this paper, we investigate this problem in the UL and by using geometrical and semi-analytical approaches, we define this upper bound. Also, by characterizing an accurate mathematical model for the asynchronous interference in Rayleigh fading channels, we were be able to employ a standard MMSE-based receiver that mitigates this interference. Furthermore, a typical joint channel and delay estimation block is incorporated into the receiver to examine its performance with estimation errors. Platform: |
Size: 1869319 |
Author:ahamza |
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Search - rayleigh fading channel in ofdm