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Description: 基于子空间算法的ofdm系统半盲估计，希望对信道估计的同仁有帮助！-subspace algorithm based on the semi-blind system ofdm estimate, and I hope to channel estimation colleagues help!
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Size: 1852 |
Author: wangfuli |
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Description: 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.
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Size: 1265450 |
Author: 吴大亨 |
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Description: 基于子空间算法的ofdm系统半盲估计，希望对信道估计的同仁有帮助！-subspace algorithm based on the semi-blind system ofdm estimate, and I hope to channel estimation colleagues help!
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Size: 2048 |
Author: wangfuli |
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Description: Blind channel estimation equalization
adpative CMA method
-Blind channel estimation equalization ad CMA method pative
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Size: 2048 |
Author: 李艳芬 |
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Description: A new blind adaptive multiuser detection scheme based on a hybrid of Kalman filter and
subspace estimation is proposed. It is shown that the detector can be expressed as an anchored
signal in the signal subspace and the coefficients can be estimated by the Kalman filter using only
the signature waveform and the timing of the desired user.-A new blind adaptive multiuser detection s cheme based on a hybrid of the Kalman filter and subs pace estimation is proposed. It is shown that th e detector can be expressed as an anchored signa l in the signal subspace and the coefficients ca n be estimated by the Kalman filter using only th e signature waveform and the timing of the desir ed user.
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Size: 389120 |
Author: rifer |
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Description: 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.
Platform: |
Size: 1265664 |
Author: 吴大亨 |
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Description: 盲信号处理是近十几年信号处理研究较活跃的方向，它在许多领域有较广泛的应用。-Blind signal processing is nearly ten years, more active signal processing research direction, which in many areas have more extensive applications.
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Size: 247808 |
Author: lining |
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Description: 盲均衡的中文期刊文章，50多篇，经典-Blind Equalization of Chinese journal articles, more than 50 articles, classic
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Size: 6738944 |
Author: song |
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Description: Direct Blind Multiuser Detection for CDMA in
Multipath without Channel Estimation
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Size: 214016 |
Author: hesi |
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Description: 采用滤波器组，将盲分离与声源定位结合在一起。滤波器组中分别进行子带处理，并且在每个子带中进行声源定位，最后综合所有子带估计的方向得到多个声源的方位信息，同时将声源信息作为ICA分析的约束条件，可以在色噪声及多得到更好的盲分离效果。其优势在于用滤波器组进行多次的估计声源方向，再加以合适的权值均衡后即可得到更优的估计。-The use of filters will be blind source separation and sound localization together. Filter group were sub-band treatment, and in each sub-band in Sound Source Localization, and finally all the sub-band is estimated to be more than the direction of sound source location information, as well as sound source information as ICA analysis of the binding conditions, colored noise can be better and many of the blind source separation effect. Its advantage lies in a number of filter banks with estimated sound source direction, coupled with an appropriate balance weights can be obtained after the better estimate.
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Size: 462848 |
Author: chen |
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Description: 进行等时延分段，并对等间隔段的两个时延矩阵分别求取均值，采用类似联合近似对角化，估计出最优化的酉矩阵，-ing second-order statistics (different time-delay correlation matrix) of non-stationary and structural characteristics of the signal timing can roughly estimate that the instantaneous linear mixture of blind source signal. With the time delay increasing, only using a single delay covariance equalization and ignoring the time-varying characteristics of the signal, which difficult to ensure the performance of algorithm. Analysis of the average characteristics of ma
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Size: 166912 |
Author: 心结 |
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Description: 根据接收数据阵x 、信道长度LH、过采样因子q ，采用Hopfield 盲处理方法，恢复出相应于x的尽可能长的BPSK发送序列，并估计 信道。-Based on the received data matrix x, the channel length of the LH, oversampling factor q, with Hopfield blind treatment, recovery corresponding to x, send a sequence of BPSK as long as possible, and the channel estimate.
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Size: 8192 |
Author: sophy |
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Description: 这是一篇很好的有关信道估计的文章，
可以用来快速的了解信道估计的基本内容-In this paper, a method for fast blind estimation
of DS-SS signal is proposed which aims at the
Direct-Sequence Spread- Spectrum (DS-SS) signals
with parameters unknown. Considering the
characteristic that Pseudo-Random noise (PN)
sequence modulates the information symbol, we
make use of the method based on the second-order
cyclic-cumulant to estimate the period of PN
sequence, and then the method of segmented
cross-correlation to estimate the synchronous start
bit between the information symbols and the PN
codes. On base of this, a method of multiple
subsection cross-correlation average is used to
estimate the PN sequence. Computer simulations
show that the method can work well on signals at
low signal noise ratio (SNR).
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Size: 103424 |
Author: renkill |
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Description: 信号盲估计，用于信道辨识，能准确估计出信道参数-信号盲估计，用于信道辨识允许输入拉丁字符的拼音请键入文字或网站地址，或者上传文档。
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朗读显示对应的拉丁字符的拼音Xìnhào máng gūjì, yòng yú xìndào biànshì将中文Blind signal estimation for channel identification, can accurately estimate the channel parameters
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Size: 1024 |
Author: sophy |
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Description: The basis of branch and bound algorithms is a ranking function. The ranking function assigns a value to each node in the graph. At each step, a branch and bound algorithm uses the ranking function to decide which node to expand next. In contrast, the usual DFS (Depth First Search) and BFS( Breadth First Search) exploration algorithms perform a blind search of the graph. Ideally, the ranking function, c(x), ranks nodes based on the cost of a minimal solution reachable from node x. The problem with this ranking function is that the minimal solution must be known ahead of time. Instead, the ranking function uses an estimate, g(x), of the cost of a minimal solution reachable from node x. Using g(x) to rank nodes may require exploring unnecessary nodes in the graph?particularly if g(x) is not a good estimate.The final element of the ranking function measures the cost of reaching a node from the root. As the searches gets farther from the root node, the node falls in the ranking.
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Size: 8192 |
Author: sathiyaraj124 |
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Description: This contribution considers semi-blind adaptive equalization for communication systems that employ high-throughput quadrature
amplitude modulation signalling. A minimum number of training symbols, approximately equal to the dimension
of the equalizer, are first utilized to provide a rough initial least-squares estimate of the equalizer’s weight vector. A
novel gradient-Newton concurrent constant modulus algorithm and soft decision-directed scheme are then applied to adapt
the equalizer. The proposed semi-blind adaptive algorithm is capable of converging fast and accurately to the optimal
minimum mean-square error equalization solution. Simulation results obtained demonstrate that the convergence speed of this
semi-blind adaptive algorithm is close to that of the training-based recursive least-square algorithm
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Size: 185344 |
Author: yh |
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Description: 半盲估计算法利用很少的导频符号，以LMMSE准则来估计、初始化信道系数，运用的两种算法进行对比，牺牲极小的带宽而尽可能准确的传输有用信息-Half blind algorithm using little pilot.finally symbols, with LMMSE criteria to estimate, initialization, the use of the channel coefficient two algorithm is compared, and sacrifice of tiny bandwidth and accurately as possible transmission useful information
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Size: 2048 |
Author: 韩寒 |
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Description: 二阶稀疏信号欠定盲分离，基于超平面法矢量的混合矩阵的估计-Second-order sparse underdetermined blind signal separation method based on hyperplane vector mixing matrix estimate
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Size: 1024 |
Author: 李飞 |
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Description: Diversity techniques for blind channel equalization in mobile
communications.This paper deals with blind equalization of mobile channels, which
are either frequency-selective or multiplicative. The proposed algorithm
can be used for channel distortion compensation in diversity
systems subject to rapidly varying channels, where a short set of data
is available to estimate the equalizer coefficients.
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Size: 69632 |
Author: abd091 |
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Description: it talks about blind estimation and semi-blind estimation in OFDMA system, in matlab simulink-it talks about blind estimation and semi-blind estimation in OFDMA system, in matlab simulink..
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Size: 1024 |
Author: bassim |
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