虫虫首页|资源下载|资源专辑|精品软件
登录|注册

likelihood

  • LDPC码译码相关文献 Bounds on the maximum likelihood decoding error probability of low density parity check

    LDPC码译码相关文献 Bounds on the maximum likelihood decoding error probability of low density parity check codes

    标签: probability likelihood decoding maximum

    上传时间: 2015-11-25

    上传用户:wendy15

  • % This routine provides a convenient way to produce Pd/FAD information % from likelihood ratio info

    % This routine provides a convenient way to produce Pd/FAD information % from likelihood ratio information.

    标签: information convenient likelihood provides

    上传时间: 2016-01-05

    上传用户:liglechongchong

  • A general decision rule for stochastic blind maximum-likelihood OSTBC detection is derived.

    A general decision rule for stochastic blind maximum-likelihood OSTBC detection is derived.

    标签: maximum-likelihood stochastic detection decision

    上传时间: 2013-12-03

    上传用户:xcy122677

  • A stack-based sequential depth-first decoder that returns Maximum-likelihood solutions to spherical

    A stack-based sequential depth-first decoder that returns Maximum-likelihood solutions to spherical LAST coded MIMO system-type problems

    标签: Maximum-likelihood stack-based depth-first sequential

    上传时间: 2013-12-20

    上传用户:hebmuljb

  • he algorithm is equivalent to Infomax by Bell and Sejnowski 1995 [1] using a maximum likelihood form

    he algorithm is equivalent to Infomax by Bell and Sejnowski 1995 [1] using a maximum likelihood formulation. No noise is assumed and the number of observations must equal the number of sources. The BFGS method [2] is used for optimization. The number of independent components are calculated using Bayes Information Criterion [3] (BIC), with PCA for dimension reduction.

    标签: equivalent likelihood algorithm Sejnowski

    上传时间: 2016-09-17

    上传用户:Altman

  • Maximum likelihood Methods in Radar Array Signal Processing

    Maximum likelihood Methods in Radar Array Signal Processing

    标签: likelihood Processing Maximum Methods

    上传时间: 2013-12-29

    上传用户:dave520l

  • This demo shows the BER performance of linear, decision feedback (DFE), and maximum likelihood seque

    This demo shows the BER performance of linear, decision feedback (DFE), and maximum likelihood sequence estimation (MLSE) equalizers when operating in a static channel with a deep null. The MLSE equalizer is invoked first with perfect channel knowledge, then with an imperfect, although straightforward, channel estimation algorithm. The BER results are determined through Monte Carlo simulation. The demo shows how to use these equalizers seamlessly across multiple blocks of data, where equalizer state must be maintained between data blocks.

    标签: performance likelihood decision feedback

    上传时间: 2013-11-25

    上传用户:1079836864

  • Implements Maximum likelihood estimation of beta and other parameters for model of stock portfolio v

    Implements Maximum likelihood estimation of beta and other parameters for model of stock portfolio vs. index using kalman filter

    标签: Implements likelihood estimation parameters

    上传时间: 2013-12-27

    上传用户:zhangzhenyu

  • 基于数据符号同步的FPGA仿真实现

    近年来,人们对无线数据和多媒体业务的需求迅猛增加,促进了宽带无线通信新技术的发展和应用。正交频分复用 (Orthogonal Frequency Division Multiolexing,OFDM)技术已经广泛应用于各种高速宽带无线通信系统中。然而 OFDM 系统相比单载波系统更容易受到频偏和时偏的影响,因此如何有效地消除频偏和时偏,实现系统的时频同步是 OFDM 系统中非常关键的技术。 本文讨论了非同步对 OFDM 系统的影响,分析了当前用于 OFDM 系统中基于数据符号的同步算法,并简单介绍非基于数据符号同步技术。基于数据符号的同步技术通过加入训练符号或导频等附加信息,并利用导频或训练符号的相关性实现时频同步。此算法由于加入了附加信息,降低了带宽利用率,但同步精度相对较高,同步捕获时间较短。 随着电子芯片技术的快速发展,电子设计自动化 (Electronic DesignAutomation,EDA) 技术和可编程逻辑芯片 (FPGA/CPLD) 的应用越来越受到大家的重视,为此文中对 EDA 技术和 Altera 公司制造的 FPGA 芯片的原理和结构特点进行了阐述,还介绍了在相关软件平台进行开发的系统流程。 论文在对基于数据符号三种算法进行较详细的分析和研究的基础上,尤其改进了基于导频符号的同步算法之后,利用 Altera 公司的 FPGA 芯片EP1S25F102015 在 OuartusⅡ5.0 工具平台上实现了 OFDM 同步的硬件设计,然后进行了软件仿真。其中对基于导频符号同步的改进算法硬件设计过程了进行了详细阐述。不仅如此,对于基于 PN 序列帧的同步算法和基于循环前缀 (Cycle Prefix,CP) 的极大似然 (Maximam likelihood,ML)估计同步算法也有具体的仿真实现。 最后,文章还对它们进行了比较,基于导频符号同步设计的同步精度比较高,但是耗费芯片的资源多,另一个缺点是没有频偏估计,因此运用受到一定限制。基于 PN 序列帧的同步设计使用了最少的芯片资源,但要提取 PN 序列中的信号数据有一定困难。基于循环前缀的同步设计占用了芯片 I/O 脚稍显多。这几种同步算法各有优缺点,但可以根据不同的信道环境选用它们。

    标签: FPGA 数据 同步的 仿真实现

    上传时间: 2013-04-24

    上传用户:断点PPpp

  • This a Bayesian ICA algorithm for the linear instantaneous mixing model with additive Gaussian noise

    This a Bayesian ICA algorithm for the linear instantaneous mixing model with additive Gaussian noise [1]. The inference problem is solved by ML-II, i.e. the sources are found by integration over the source posterior and the noise covariance and mixing matrix are found by maximization of the marginal likelihood [1]. The sufficient statistics are estimated by either variational mean field theory with the linear response correction or by adaptive TAP mean field theory [2,3]. The mean field equations are solved by a belief propagation method [4] or sequential iteration. The computational complexity is N M^3, where N is the number of time samples and M the number of sources.

    标签: instantaneous algorithm Bayesian Gaussian

    上传时间: 2013-12-19

    上传用户:jjj0202