Search - probability error in channel

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[File Operate] WirelesscoherentOFDMmodemsimulation DL : 0: This project aim was to build wireless software modem for data communication between two computers using an acoustic interface in the voice frequency range (20Hz– 20,000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz – 20,000Hz) and the receiving antenna is a microphone (frequency response of: 100Hz – 16,000Hz). The test files used as information files were text files. This goal was attained both in an incoherent scheme and in a coherent scheme. Build under Matlab code, our modem uses OFDM (orthogonal frequency division multiplexing) modulation, synchronization by LMS sequence, channel estimation (no equalizer) via pilot tones. The symbols are either PSK or ASK for a constellation size of 2 or 4. To optimize the probability of error, these symbols were mapped using Gray mapping. Report
Update : 2008-10-13 Size : 546.43kb Publisher : buyop
[Crypt_Decrypt algrithms] LDPC-2006-02-08.tar.gz DL : 0: Software for Low Density Parity Check Codes Radford M. Neal Version of 2006-02-08. This collection of programs and modules, written in C, is intended to support research and education concerning Low Density Parity Check (LDPC) codes. (Note, however, that the copyright notice no longer restricts use to these purposes). These codes were invented by Robert Gallager in the early 1960's, and re-invented and shown to have very good performance by David MacKay and myself in the mid-1990's. The decoding algorithm for LDPC codes is related to that used for Turbo codes, and to probabilistic inference methods used in other fields. Variations on LDPC and Turbo codes are currently the best practical codes known, in terms of their ability to transmit data at rates approaching channel capacity with very low error probability.
Update : 2011-04-23 Size : 395.57kb Publisher : netor4you@yahoo.com
[File Format] WirelesscoherentOFDMmodemsimulation DL : 0: This project aim was to build wireless software modem for data communication between two computers using an acoustic interface in the voice frequency range (20Hz– 20,000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz – 20,000Hz) and the receiving antenna is a microphone (frequency response of: 100Hz – 16,000Hz). The test files used as information files were text files. This goal was attained both in an incoherent scheme and in a coherent scheme. Build under Matlab code, our modem uses OFDM (orthogonal frequency division multiplexing) modulation, synchronization by LMS sequence, channel estimation (no equalizer) via pilot tones. The symbols are either PSK or ASK for a constellation size of 2 or 4. To optimize the probability of error, these symbols were mapped using Gray mapping. Report-This project aim was to build wireless software modem for data communicationbetween two computers using an acoustic interface in the voice frequency range (20Hz-20000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz-20000Hz) and the receiving antenna is a microphone (frequency response of: 100Hz-16000Hz). The test files used as information files were text files.This goal was attained both in an incoherent scheme and in a coherent scheme.Build under Matlab code, our modem uses OFDM ( orthogonal frequency divisionmultiplexing) modulation, synchronization by LMS sequence, channel estimation (noequalizer) via pilot tones. The symbols are either PSK or ASK for a constellation size of2 or 4. To optimize the probability of error, these symbols were mapped using Graymapping.Report
Update : 2025-04-26 Size : 546kb Publisher :
[matlab] AWGN-BPSK DL : 0: 这个Matlab程序计算在高斯白噪声（Additive White Gaussian Channel ）下BPSK调制中的错误概率。-The Matlab procedure in the Gaussian white noise (Additive White Gaussian Channel) under BPSK modulation of the error probability.
Update : 2025-04-26 Size : 42kb Publisher : 张涛
[MiddleWare] Chapter1 DL : 0: (书)现代通信系统使用MATLAB第一章-ALLIANCES is a recently proposed cooperative random access protocol for wireless networks. In this paper we modify the original model to include user location information. We also derive pair-wise error probability (PEP) under Rayleigh flat fading channel and a power-law attenuation environment. Based on the PEP analysis we propose an optimal relay selection scheme, which achieves significant throughput gains as compared to the random relay selection scheme in the original ALLIANCES.
Update : 2025-04-26 Size : 8kb Publisher : 史志举
[Books] Chapter2 DL : 0: (书)现代通信系统使用MATLAB第二章-ALLIANCES is a recently proposed cooperative random access protocol for wireless networks. In this paper we modify the original model to include user location information. We also derive pair-wise error probability (PEP) under Rayleigh flat fading channel and a power-law attenuation environment. Based on the PEP analysis we propose an optimal relay selection scheme, which achieves significant throughput gains as compared to the random relay selection scheme in the original ALLIANCES.
Update : 2025-04-26 Size : 6kb Publisher : 史志举
[matlab] Chapter3 DL : 0: (书)现代通信系统使用MATLAB第三章-ALLIANCES is a recently proposed cooperative random access protocol for wireless networks. In this paper we modify the original model to include user location information. We also derive pair-wise error probability (PEP) under Rayleigh flat fading channel and a power-law attenuation environment. Based on the PEP analysis we propose an optimal relay selection scheme, which achieves significant throughput gains as compared to the random relay selection scheme in the original ALLIANCES.
Update : 2025-04-26 Size : 20kb Publisher : 史志举
[matlab] Chapter4 DL : 0: (书)现代通信系统使用MATLAB第四章-ALLIANCES is a recently proposed cooperative random access protocol for wireless networks. In this paper we modify the original model to include user location information. We also derive pair-wise error probability (PEP) under Rayleigh flat fading channel and a power-law attenuation environment. Based on the PEP analysis we propose an optimal relay selection scheme, which achieves significant throughput gains as compared to the random relay selection scheme in the original ALLIANCES.
Update : 2025-04-26 Size : 10kb Publisher : 史志举
[Books] 005c DL : 1: LDPC码在AWGN信道下的译码程序（c语言）-ALLIANCES is a recently proposed cooperative random access protocol for wireless networks. In this paper we modify the original model to include user location information. We also derive pair-wise error probability (PEP) under Rayleigh flat fading channel and a power-law attenuation environment. Based on the PEP analysis we propose an optimal relay selection scheme, which achieves significant throughput gains as compared to the random relay selection scheme in the original ALLIANCES.
Update : 2025-04-26 Size : 7kb Publisher : 史志举
[matlab] 16QAM DL : 0: matlab实现16QAM调制解调 matlab实现16QAM调制解调-ALLIANCES is a recently proposed cooperative random access protocol for wireless networks. In this paper we modify the original model to include user location information. We also derive pair-wise error probability (PEP) under Rayleigh flat fading channel and a power-law attenuation environment. Based on the PEP analysis we propose an optimal relay selection scheme, which achieves significant throughput gains as compared to the random relay selection scheme in the original ALLIANCES.
Update : 2025-04-26 Size : 1kb Publisher : 史志举
[Communication-Mobile] OFDM_with_pilot DL : 0: In this Mfile, I want to investigate the performance of LSE algorithm in OFDM channel estimation with methods of equalizations like MRC and ZF. For further information see the "Xiaodong Cai and Georgios B. Giannakis, Error Probability Minimizing Pilots for OFDM with M-PSK Modulation over Rayliegh-Fading Channels,” IEEE Transactions on Vehicular technology, vol. 53, No. 1, pp 146-155, Jan. 2004.
Update : 2025-04-26 Size : 28kb Publisher : Ardalan
[Communication-Mobile] OFDM_sync DL : 0: Matlab的OFDM在多径Rayleigh信道下的同步 1. 假设频率已同步，设计OFDM一种具体的采用循环前缀进行时间同步方法，用Simulink进行仿真，画出比特信噪比与捕获概率的关系曲线。 2. 设时间已同步，设计OFDM一种具体的采用循环前缀进行频率同步方法，用Simulink进行仿真，画出比特信噪比与频率同步误差的关系曲线.-Matlab-OFDM in multipath Rayleigh channel synchronization 1. Assume that the frequency has been synchronized, the design of a specific OFDM cyclic prefix for time synchronization method, using Simulink simulation to depict the bit signal to noise ratio and the capture probability curve. 2. Set up time is synchronized to design a specific OFDM cyclic prefix for frequency synchronization method, using Simulink simulation to depict the bit signal to noise ratio and frequency synchronization error of the curve.
Update : 2025-04-26 Size : 21kb Publisher : the13thstone
[Other] oqpsk_msk_compare DL : 0: The program is to simulate the variation in probability of error with signal energy/bit (constant noise power) for OQPSK & MSK in AWGN Channel
Update : 2025-04-26 Size : 28kb Publisher : kamrul islam
[Program doc] Viterb DL : 0: viterb算法是卷积码中重要的一种译码算法，程序中用MATLAB实现了VITERB的译码算法，并且写了信道编码程序和二进制码通过以p概率错误的信道程序-viterb algorithm is important as a convolutional code decoding algorithm, the program using MATLAB to achieve a VITERB the decoding algorithm, and wrote letters Road, binary coding process and the probability of error through a p-channel process
Update : 2025-04-26 Size : 3kb Publisher : jack
[matlab] upload_pudn6 DL : 0: This program is used to Simulate the performance of (n,k)Reed Solomon code in AWGN channel with plotting the results and compare with the theoretical performance of this code in AWGN channel. The program also print the SNRdB, absolute snr ,simulated probability of error, exact probability of error in each steps-This program is used to Simulate the performance of (n,k)Reed Solomon code in AWGN channel with plotting the results and compare with the theoretical performance of this code in AWGN channel. The program also print the SNRdB, absolute snr ,simulated probability of error, exact probability of error in each steps
Update : 2025-04-26 Size : 1kb Publisher : ghanim
[File Format] 1 DL : 0: Abstract-The paper introduces a statistical channel model which is a combination of Rice and lognormal statistics, and is suitable in principle to all types of environment (rural, suburban, urban) simply by tuning the model parameters. The model validity is confirmed by comparisons with measurement data collected in the literature. Empirical formulas are derived for the model parameters to fit measured data over a wide range of elevation angles. In particular, the model is applied to nongeostationary satellite channels, such as low-Earth orbit and medium-Earth orbit channels, in which for a given user located in a generic site the elevation angle changes continuously. Finally, examples of average bit error probability evaluations in the channel are provided.
Update : 2025-04-26 Size : 391kb Publisher : 章清
[Other] Mitigating-Channel-Estimation-Error DL : 0: 双项通信，有关信道估计和误差的分析，我下载时要钱的哦。。分享了-Channel estimation error problem is among the main causes of performance degradation in wireless networks. In this paper, we investigate the impact of cooperative communications on mitigating the effect of channel estimation error. Two main performance criteria, namely, the traditional outage probability and the proposed signal-to-noise ratio (SNR) gap ratio, are utilized to characterize such impact.
Update : 2025-04-26 Size : 134kb Publisher : 程望
[matlab] BPSK-AND-QPSK-BER-FOR-RAYLEIGH-CHANNEL DL : 0: this code explains the performance of BPSK and QPSK modulation techniques in terms of there bit error probability. this code plots the simulated bit error rate of bpsk and qpsk in terms of SNR. both modulation techniques are explained in RAYLEIGH fading channel.
Update : 2025-04-26 Size : 1kb Publisher : surender redhu
[matlab] Outage-Probability DL : 0: Outage probability is a crude measure of performance. It is defined as the probability when mutual information is less than the given threshold. The importance of outage probability is that when outage occurs, there is more likely to have decoding failure. In other words, it is a typical error. In fading channels, the received signal has no constant power which be depending on the channel, can be described by probability models. Thus, signal to noise ratio will also becomes a random variable. and Thus the maximum capacity of the channel becomes a random variable. Outage probability says according to the variable signal to noise ratio at the received end, what is the probability that a rate is not supported due to variable signal to noise raito.
Update : 2025-04-26 Size : 1kb Publisher : Manzar Hussain
[matlab] 2psk-matlab DL : 0: 仿真BPSK，该文件包括调制与解调程序，可计算出信息误码率-simulation of BPSK，the file include mmodulator and demodulator parts,can calculate the probability of error nums in channel.
Update : 2025-04-26 Size : 2.86mb Publisher : 吴松

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