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．
標簽： algorithms LMS algorithm filtering
上傳時間： 2014-01-23
上傳用戶：yxgi5
用burg算法實現功率譜的估計，可以改變信噪比snr，階次P，可以分析分辨率
上傳時間： 2014-07-08
上傳用戶：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).
標簽： convolutional includes program encoder
上傳時間： 2015-12-24
上傳用戶：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.
標簽： frequency-offset estimation quadrature amplitude
上傳時間： 2014-01-22
上傳用戶：牛布牛
是matlab的源代碼，功能是從snr到Eb_N0的轉換。并帶繪圖功能
上傳時間： 2013-12-19
上傳用戶：zhaoq123
在通訊系統中，可以計算一個信號的snr,THD等
標簽： 通訊系統
上傳時間： 2014-01-14
上傳用戶：qiaoyue
基于OFDM的無線寬帶系統仿真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.
標簽： simulator i.e. system-level link-level
上傳時間： 2016-03-15
上傳用戶：xsnjzljj
matlab環境中ofdm基本原理的源程序，實現了誤碼率和snr關系的圖形顯示
上傳時間： 2014-01-04
上傳用戶：ruixue198909
ns2下無線信道模型設計文檔，詳細介紹了如何在 ns2下實現帶snr的無線信道
上傳時間： 2014-12-06
上傳用戶：開懷常笑
FFH中傳統門限的比較獲取，snr的不同，BER不同，從中最佳
上傳時間： 2016-10-24
上傳用戶：zhouli
