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A novel fast recursive MMSE-SIC detection algorithm for V-BLAST systems

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 2007年第6期6卷 2022-2026页

作者： Luo, Zhendong Liu, Siyang Zhao, Ming Liu, Yuanan Alcatel Lucent Bell Labs Res China Beijing 100080 Peoples R China Tsinghua Univ Beijing 100084 Peoples R China Beijing Univ Posts & Telecommun Sch Telecommun Engn Beijing 100876 Peoples R China 3DSP Beijing Ltd Corp Beijing 100080 Peoples R China

A novel fast recursive minimum mean square error, successive interference cancellation (MMSE-SIC) algorithm with optimal detection order for vertical Bell Laboratories layered space-time (V-BLAST) systems is proposed. In this algorithm, the MMSE filter matrices and the optimal detection order are successively computed from the previously obtained filter matrices according to simple recursive pseudoinverse formulas, so that the algorithmic complexity is reduced significantly, especially for the practical number of transmit/receive antennas.

关键词： MIMO systems minimum mean square error (MMSE) recursive algorithm signal detection successive interference cancellation (SIC) V-BLAST

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A recursive molecular sticker algorithm for the maximal clique problem

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JOURNAL OF COMPUTATIONAL AND THEORETICAL NANOSCIENCE 2007年第7-8期4卷 1253-1256页

作者： Geng, Xiutang Xiao, Jianhua Xu, Jin Huazhong Univ Sci & Technol Dept Control Sci & Engn Key Lab Image Proc & Intelligent Control Wuhan 430074 Peoples R China

Among various DNA computing algorithms, it is very important to generate an initial data pool that covers both correct and incorrect answers. However, algorithms based on brute force search are limited to problem size, since the bigger the problem, the bigger the initial data pool. In this paper, we propose a recursive molecular sticker algorithm to resolve the maximal clique problem. Some graphs with more vertices can be handled with the proposed algorithm. Particularly, our algorithm is adapted to some graphs with lower edge density. For a given graph with n vertices, the time complexity of our algorithm is O(n(2)). In addition, three kinds of enzymes, two kinds of memory strands, n kinds of stickers, n sticker tubes, n+2 separation tubes and n data tubes are necessary for our recursive molecular sticker algorithm to resolve the maximal clique problem.

关键词： DNA computing sticker model maximal clique problem recursive algorithm

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Pseudo-fractional ARMA modelling using a double Levinson recursion

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IET CONTROL THEORY AND APPLICATIONS 2007年第1期1卷 173-178页

作者： Ortigueira, M. D. Serralheiro, A. J. Univ Nova Lisboa Fac Ciencias & Tecnol P-2829516 Caparica Portugal INESC ID L2F P-1000029 Lisbon Portugal Acad Mil P-1150175 Lisbon Portugal

The modelling of fractional linear systems through ARMA models is addressed. To perform this study, a new recursive algorithm for impulse response ARMA modelling is presented. This is a general algorithm that allows the recursive construction of ARMA models from the impulse response sequence. This algorithm does not need an exact order specification, as it gives some insights into the correct orders. It is applied to modelling fractional linear systems described by fractional powers of the backward difference and the bilinear transformations. The analysis of the results leads to propose suitable models for those systems.

关键词： autoregressive moving average processes poles and zeros bilinear transformations recursive algorithm impulse response ARMA modelling backward difference double Levinson recursion pseudo-fractional ARMA modelling transient response fractional linear systems

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Asymptotic normality of the recursive M-estimators of the scale parameters

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ANNALS OF THE INSTITUTE OF STATISTICAL MATHEMATICS 2007年第2期59卷 367-384页

作者： Miao, Baiqi Wu, Yuehua Liu, Donghai Tong, Qian York Univ Dept Math & Stat Toronto ON M3J 1P3 Canada Univ Sci & Technol China Dept Stat & Finance Hefei 230026 Anhui Peoples R China

In this paper, the limit distributions of the recursive M-estimators of scatter parameters in a multivariate linear model setting are studied. Under some mild conditions, the asymptotic normality of the recursive M-esimtators is established. Some Monte Carlo simulation results are presented to illustrate the performance of the recursive M-estimators.

关键词： M-estimation multivariate linear regression model recursive algorithm robust estimation scatter parameter diffusion process strong consistency asymptotic normality

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An efficient method for reliability evaluation of multistate networks given all minimal path vectors

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IIE TRANSACTIONS 2007年第8期39卷 811-817页

作者： Zuo, Ming J. Tian, Zhigang Huang, Hong-Zhong Univ Alberta Dept Mech Engn Edmonton AB T6G 2G8 Canada Univ Elect Sci & Technol China Sch Mech Elect & Ind Engn Chengdu 610054 Peoples R China

The multistate networks under consideration consist of a source node, a sink node, and some independent failure-prone components in between the nodes. The components can work at different levels of capacity For such a network, we are interested in evaluating the probability that the flow from the source node to the sink node is equal to or greater than a demanded flow of d units. A general method for reliability evaluation of such multistate networks is using minimal path (cut) vectors. A minimal path vector to system state d is called a d-MP. Approaches for generating all d-MPs have been reported. Given that all d-MPs have been found, the issue becomes how to evaluate the probability of the union of the events that the component state vector is greater than or equal to at least one of the d-MPs. There is a need for a more efficient method of determining the probability of this union of events. In this paper, we report an efficient recursive algorithm for this union probability evaluation based on the Sum of Disjoint Products (SDP) principle, and name it the recursive Sum of Disjoint Products (RSDP) algorithm. The basic idea is that, based on the SDP principle and a specially defined "maximum" operator, "Phi", the probability of a union with L vectors can be calculated via calculating the probabilities of several unions with L - I vectors or less. The correctness of RSDP is illustrated. The efficiency of this algorithm is investigated by comparing it with an existing algorithm that is generally accepted to be efficient. It is found that RSDP is more efficient than the existing algorithm when the number of components of a. system is not too small. RSDP provides us with an efficient, systematic and simple approach for evaluating multistate network reliability given all d-MPs.

关键词： two-terminal networks multi-state reliability minimal path vectors recursive algorithm

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Subspace-based prediction of linear time-varying stochastic systems

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AUTOMATICA 2007年第12期43卷 2009-2021页

作者： Kameyama, Kentaro Ohsumi, Akira Fukui Natl Coll Technol Dept Mech Engn Fukui 9168507 Japan Kyoto Inst Technol Grad Sch Sci & Technol Dept Mech & Syst Engn Kyoto 6068585 Japan

In this paper, a new subspace method for predicting time-varying stochastic systems is proposed. Using the concept of angle between past and present subspaces spanned by the extended observability matrices, the future signal subspace is predicted by rotating the present subspace in the geometrical sense, and time-varying system matrices are derived from the resultant signal subspace. Proposed algorithm is improved for fast-varying systems. Furthermore, recursive implementation of both algorithms is developed. (c) 2007 Elsevier Ltd. All rights reserved.

关键词： subspace prediction subspace methods subspace identification recursive algorithm time-varying systems

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A new power system digital harmonic analyzer

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IEEE TRANSACTIONS ON POWER DELIVERY 2007年第2期22卷 772-780页

作者： Tomic, Josif J. Kusljevic, Miodrag D. Vujicic, Vladimir V. Univ Novi Sad Novi Sad 21000 Serbia Termoelektro Enel AD Belgrade 11060 Serbia

In this paper, new digital instruments measuring power-quality indicators and harmonic analyzers are developed. A new technique for simultaneous local system frequency and amplitudes of the fundamental and higher harmonies estimation from either a voltage or current signal is presented. The structure consists of threedecoupled modules: the first one for an adaptive filter of input signal, the second one for frequency estimation, and the third one for harmonic amplitude estimation. A very suitable algorithm for frequency and harmonic amplitude estimation is obtained. This technique provides accurate frequency estimates with error in the range of 0.002 Hz and amplitude estimates with error in the range of 0.03% for SNR = 60 dB in about 25 ms. The theoretical basis and practical implementation of the technique are described. To demonstrate the performance of the developed algorithm, computer simulated data records are processed. Data of the distribution power system voltage signals are also collected in the laboratory environment and are processed in a newly developed digital PC-based harmonic analyzer. It has been found that the proposed method really meets the need of offline applications. Even more, by using the parallel computation algorithms, this method should meet the need of online applications and should be more practical.

关键词： adaptive filtering amplitude estimation computer relaying digital filters finite-impulse-response (FIR) filter frequency estimation frequency measurement harmonic analysis harmonic analyzer harmonics power quality (PQ) recursive algorithm

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A simple recursive algorithm for frequency estimation

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IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 2004年第2期53卷 335-340页

作者： Kusljevic, MD Termoelektro Enel AD YU-11060 Belgrade Serbia

A new approach to the design of a digital algorithm for local system frequency estimation is presented. The algorithm is derived using the maximum likelihood method. One sinusoidal voltage model was assumed. FIR digital filters used in papers [11], [12] are used to minimize the noise effect and to eliminate the presence of the harmonies effect. The algorithm showed a very high level of robustness as well as high measurement accuracy over a wide range of frequency changes. The algorithm convergence provided fast response and adaptability. This technique provides accurate estimates with error in the range of 0.005 Hz in about 25 ms and requires modest computations. The theoretical basis and practical implementation of the technique are described. To demonstrate the performance of the developed algorithm, computer simulated data records are processed.

关键词： computer relaying frequency measurement maximum likelihood method parameter estimation recursive algorithm

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An efficient method for reliability evaluation of multi-state networks given all minimal path vectors

An efficient method for reliability evaluation of multi-stat...

引用

13th ISSAT International Conference on Reliabitity and Quality in Design

作者： Tian, Zhigang Zuo, Ming J. Huang, Hong-Zhong Univ Alberta Dept Mech Engn Edmonton AB T6G 2G8 Canada Univ Elect Sci & Technol China Sch Mechatron Engn Chengdu 610054 Sichuan Peoples R China

ISBN: (纸本)9780976348627

The multi-state networks under consideration consist of a source node, a sink node, and some independent failure prone components in between. The components can work at different levels of capacity. For such a network, we are interested in evaluating the probability that the flow from the source node to the sink node is equal to or greater than a demanded flow of d units. A general method for reliability evaluation of such multi-state networks is using minimal path (cut) vectors. A minimal path vector to system state d is called a dMPs. Given that all d-MPs have been found, the issue becomes how to evaluate the probability of the union of the events that the component state vector is greater than or equal to at least one of the d-MPs. In this paper, we report an efficient recursive algorithm for this union probability evaluation based on the sum of disjoint products (SDP) principle, and name it the recursive Sum of Disjoint Products (RSDP) algorithm. RSDP provides us with an efficient, systematic and simple approach for evaluating multi-state two-terminal network reliability given all d-MPs.

关键词： two-terminal networks multi-state reliability minimal path vectors recursive algorithm

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The sub-band decomposition of fluctuated signals for the estimation of power spectra

The sub-band decomposition of fluctuated signals for the est...

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IEEE International Symposium on Intelligent Signal Processing

作者： Zajacek, Jiri Grmela, Lubomir Brno Univ Technol Dept Phys Brno 61600 Czech Republic

ISBN: (纸本)9781424408290

The naive spectroscopy is used to determinate quality and reliabiliy of semiconductor materials. We have used the means of time-frequency analysis for processing of long time duration stochastic signal. Tree-structured FIR filter bank implemented in a recursive way for octave dividing frequency band was designed as full parallel computational algorithm for Power Spectral Density estimation. In the very low frequency area we will obtain high resolution and low level variance of PSD.

关键词： 1/f noise power spectral density (PSD) FIR octave filter bank recursive algorithm

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