Some algorithms of variable step size LMS adaptive filtering are studied．The VS—LMS algorithm is improved． Another new non-linear function between肛and e(／ t)is established．The theoretic analysis and computer simulation results show that this algorithm converges more quickly than the origina1．Furthermore，better antinoise property is exhibited under Low—snr environment than the original one．
标签： algorithms LMS algorithm filtering
上传时间： 2014-01-23
上传用户：yxgi5
用burg算法实现功率谱的估计，可以改变信噪比snr，阶次P，可以分析分辨率
上传时间： 2014-07-08
上传用户：我干你啊
This program includes: [5 7] convolutional code (encoder) + BPSK + AWGN + MAP (decoder). It evaluates Bit Error Rate and plots it versus snr(signal to Noise Ratio).
标签： convolutional includes program encoder
上传时间： 2015-12-24
上传用户：bruce5996
We address the problem of blind carrier frequency-offset (CFO) estimation in quadrature amplitude modulation, phase-shift keying, and pulse amplitude modulation communications systems.We study the performance of a standard CFO estimate, which consists of first raising the received signal to the Mth power, where M is an integer depending on the type and size of the symbol constellation, and then applying the nonlinear least squares (NLLS) estimation approach. At low signal-to noise ratio (snr), the NLLS method fails to provide an accurate CFO estimate because of the presence of outliers. In this letter, we derive an approximate closed-form expression for the outlier probability. This enables us to predict the mean-square error (MSE) on CFO estimation for all snr values. For a given snr, the new results also give insight into the minimum number of samples required in the CFO estimation procedure, in order to ensure that the MSE on estimation is not significantly affected by the outliers.
标签： frequency-offset estimation quadrature amplitude
上传时间： 2014-01-22
上传用户：牛布牛
是matlab的源代码，功能是从snr到Eb_N0的转换。并带绘图功能
上传时间： 2013-12-19
上传用户：zhaoq123
在通讯系统中，可以计算一个信号的snr,THD等
标签： 通讯系统
上传时间： 2014-01-14
上传用户：qiaoyue
基于OFDM的无线宽带系统仿真It contains mainly two parts, i.e. link-level simulator and system-level simulator. Link-level simulator focus on a single-cell single-user scenario, where signal is transmitted from tx, and estimated at rx. Comparing the difference in tx/rx signal, the error rate can be found out. The output of the link-level simulator is the BLER/BER vs. snr mapping table, that can be used for the system-level simulation. System-level simulator focus on a multi-cell multi-user scenario. For the sake of simplicity, it takes the mapping table aquired in the link-level simulation, measure the actural snr, and finds the corresponding error rate.
标签： simulator i.e. system-level link-level
上传时间： 2016-03-15
上传用户：xsnjzljj
matlab环境中ofdm基本原理的源程序，实现了误码率和snr关系的图形显示
上传时间： 2014-01-04
上传用户：ruixue198909
ns2下无线信道模型设计文档，详细介绍了如何在 ns2下实现带snr的无线信道
上传时间： 2014-12-06
上传用户：开怀常笑
FFH中传统门限的比较获取，snr的不同，BER不同，从中最佳
上传时间： 2016-10-24
上传用户：zhouli
