Description: 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 Platform: |
Size: 559541 |
Author:buyop |
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Description: 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. Platform: |
Size: 405064 |
Author:netor4you@yahoo.com |
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Description: 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 Platform: |
Size: 559104 |
Author: |
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Description: 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. Platform: |
Size: 43008 |
Author:张涛 |
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Description: (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. Platform: |
Size: 8192 |
Author:史志举 |
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Description: (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. Platform: |
Size: 6144 |
Author:史志举 |
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Description: (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. Platform: |
Size: 20480 |
Author:史志举 |
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Description: (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. Platform: |
Size: 10240 |
Author:史志举 |
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Description: 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. Platform: |
Size: 7168 |
Author:史志举 |
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Description: 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. Platform: |
Size: 1024 |
Author:史志举 |
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Description: 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. Platform: |
Size: 28672 |
Author:Ardalan |
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Description: 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. Platform: |
Size: 21504 |
Author:the13thstone |
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Description: The program is to simulate the variation in probability of error with signal energy/bit (constant noise power)
for OQPSK & MSK in AWGN Channel
Platform: |
Size: 28672 |
Author:kamrul islam |
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Description: 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 Platform: |
Size: 3072 |
Author:jack |
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Description: 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 Platform: |
Size: 1024 |
Author:ghanim |
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Description: 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. Platform: |
Size: 400384 |
Author:章清 |
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Description: 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. Platform: |
Size: 137216 |
Author:程望 |
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Description: 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. Platform: |
Size: 1024 |
Author:surender redhu |
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Description: 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. Platform: |
Size: 1024 |
Author:Manzar Hussain |
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Description: 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. Platform: |
Size: 2997248 |
Author:吴松 |
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Search - probability error in channel