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Two-dimensional water-filling power allocation algorithm for MIMO-OFDM systems

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Science china(Information Sciences) 2010年第6期53卷 1242-1250页

作者： JIANG YongQuan 1 , SHEN MinFen 1 & ZHOU YuanPing 2.1 department of Electronic Engineering, shantou university, {2. 515063, china 2.department of Electronic Engineering, Sichuan university, Chengdu 610064, china 1. department of Electronic Engineering Shantou University Shantou 515063 China2. Department of Electronic Engineering Sichuan University Chengdu 610064 China

Departing from the narrowband channel model, more and more researchers have recently considered the application of multiple-input multiple-output(MIMO) systems over frequency-selective fading channels in combination with the orthogonal frequency-division multiplexing(OFDM) *** this paper, we focus on the capacity of MIMO-OFDM systems and how to increase the *** has been proved that the capacity of a MIMO system with space-dimensional water-filling power allocation is greater than that of the system with uniform power *** MIMO-OFDM systems, there is an additional degree of freedom to allocate power with respect to MIMO systems:the OFDM sub-channels in *** the singular value decomposition(SVD) applied to the channel frequency response matrix, the two-dimensional water-filling power allocation algorithm for MIMO-OFDM systems is proposed based on the Lagrange method, and the corresponding capacity analysis formula is *** results show that the capacity of a MIMO-OFDM system with the proposed two-dimensional water-filling power allocation is greater than that of the system with uniform power allocation and also greater than that of the system with the one-dimensional water-filling power allocation.

关键词： MIMO-OFDM two-dimensional water-filling power allocation capacity analysis singular value decomposition(SVD)

A GEOMETRIC FEATURE FOR FINITE ELEMENT SCHEMES

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Analysis in Theory and Applications 1994年第2期10卷 83-91页

作者： Zhan Yinwei Beijing Normal university, china Permanent address: Dr. Zhan Yinwei Institute of {2. shantou university, shantou 515063 guangdong, china 1. Beijing Normal university China

In this note we characterize the geometric facture of a (μ, r, k) - FES. Namely, for a C~μ triangular in- terpolation schcme with C^r vertex data, any angle of the macrotriangle must be divided into at least (μ + 1... 详细信息

关键词： FES Math A GEOMETRIC FEATURE FOR FINITE ELEMENT SCHEMES IIC Wang

Divergence-free Hardy space on R_(+)^(N)

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Science china mathematics 2004年第2期47卷 198-208页

作者： LOU Zengjian & Alan MclntoshInstitute of mathematics, shantou university, {2. 515063, china (email: zjlou@***)Center for mathematics and Its Applications, Mathematical Science Institute, Australian National university, shantou Univ Inst Math Shantou 515063 Peoples R China Australian Natl Univ Inst Math Sci Ctr Math & Applicat Canberra ACT 0200 Australia

We introduce a divergence-free Hardy space Hz1,div(RN+,RN) and prove its divergence-free atomic decomposition. We also characterize its dual space and establish a 'div-curl' type theorem on R+3 with an application to ... 详细信息

关键词： divergence-free Hardy space atomic decomposition BMO.

Credit risk constraint mechanisms in rural financial reform

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Journal of Southeast university(English Edition) 2008年第S1期24卷 71-76页

作者： Huang Yan Wang Yantao(School of Business, shantou university, shantou {2., china) School of Business Shantou University Shantou 515063 China

To research the operating mechanisms of rural financial reform, through setting up a contract model, the constraint roles of reputation and legal intervention on the default risk arising in the operating of the credit union funds are inspected. Analysis indicates that the increase in reputation cost can reduce the probability of union member default behavior and the probability of turning to the law for the credit union funds. Meanwhile, the amount of loans and the interest rates can increase the probability of turning to the law for the credit union funds. Below the marginal values, the penalty mechanisms can reduce the balancing probabilities of member default behavior and turning to the law for the credit union funds, namely, the penalty has some "substitution effect" for turning to the law for the credit union funds.

关键词： rural financial reform credit risk constraint mechanism contract

Reduction of the Modified Korteweg-de Vries Equation in the Bilinear Form

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Communications in Nonlinear Science and Numerical Simulation 1998年第1期3卷 3-5页

作者： Yanjuan ZHU (department of mathematics & Physics, {2. university of Technology, Guangzhou 510090, china) department of mathematics & Physics Guangdong University of Technology Guangzhou 510090 China

Ｔｈｅｔｒａｄｉｔｉｏｎａｌｍｅｔｈｏｄｆｏｒｆｉｎｄｉｎｇｓｉｍｉｌａｒｉｔｙｒｅｄｕｃｔｉｏｎｓｏｆａｇｉｖｅｎｐａｒｔｉａｌｄｉｆｅｒｅｎｔｉａｌｅｑｕａｔｉｏｎ（ＰＤＥ）ｏｒａｇｉｖｅｎＰＤＥｓｙｓｔｅｍｉｓ... 详细信息

Ｔｈｅｔｒａｄｉｔｉｏｎａｌｍｅｔｈｏｄｆｏｒｆｉｎｄｉｎｇｓｉｍｉｌａｒｉｔｙｒｅｄｕｃｔｉｏｎｓｏｆａｇｉｖｅｎｐａｒｔｉａｌｄｉｆｅｒｅｎｔｉａｌｅｑｕａｔｉｏｎ（ＰＤＥ）ｏｒａｇｉｖｅｎＰＤＥｓｙｓｔｅｍｉｓｔｏｕｓｅｔｈｅｃｌａｓｓｉｃａｌ...

关键词： similarity reductions classical Lie approach

A new orthogonality relationship for orthotropic thin plate theory and its variational principle

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Science china(Physics,Mechanics & Astronomy) 2005年第3期48卷 371-380页

作者： LUO Jianhui 1 , LONG Yuqiu 2.& LIU guangdong 1 1. College of Civil Engineering, Hunan university, Changsha 410082.{2. 2. department of Civil Engineering, Tsinghua university, Beijing 100084,{2. 1. College of Civil Engineering Hunan University 410082 Changsha China 2. department of Civil Engineering Tsinghua University 100084 Beijing China

The thought how dual vectors are constructed in a new orthogonality relationship for theory of elasticity is generalized into orthotropic thin plate bending problems by using the analogy theory between plane elasticity problems and plate bending problems. Dual differential equations are directly obtained by using a mixed variables method. A dual differential matrix to be derived possesses a peculiarity of which principal diagonal sub-matrixes are zero matrixes. Two independently and symmetrically orthogonality sub-relationships are discovered. By using the integral form for elastic bending theory of orthotropic thin plate the orthogonality relationship is demonstrated. By selecting felicitous dual vectors a new orthogonality relationship for theory of elasticity can be generalized into elastic bending theory of orthotropic thin plate. By using the integral form a variational principle which is relative to differential form and a whole function expression are proposed.

关键词： theory of elasticity, thin plate theory, dual vectors, orthogonality relationship, orthotropic, variational principle.

A New Solution to the Inverse Position Analysis of the Redundant Serial Robot

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Journal of Shanghai Jiaotong university(Science) 2010年第5期15卷 610-614页

作者：赵永杰董兴建 department of Mechatronics Engineering Shantou University shantou Institute for Light Industrial Equipment Research State Key Laboratory of Mechanical System and Vibration Shanghai Jiaotong University

A new solution to the inverse position analysis of the redundant serial robot is *** inverse position analysis problem of the redundant serial robot is transformed into a minimization problem and then the optimization method is adopted to solve the nonlinear least square problem with the analytic form of a new Jacobi *** this way,the inverse solution of the redundant serial robot can be searched out quickly under the desired precision when the positions of the three non-collinear end effector points are *** inverse position analysis of the 7R redundant serial robot is illustrated as an example and the simulation results verify the efficiency of the proposed algorithm.

关键词： inverse position analysis redundant serial robot optimization method

A problem of complex oscillation for homogeneous linear differential equations

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Chinese Science Bulletin 1998年第20期43卷 1709-1712页

作者： GAO Shian and YANG Ronghua department of mathematics,South{2. Normal university,Guangzhou 510631,{2. department of mathematics, guangdong Educational College, Guangzhou 510303,{2. department of mathematics South China Normal University Guangzhou China department of mathematics Guangdong Educational College Guangzhou China

Under a combined dominant condition, an open problem of complex oscillation for the equation \%w (k) +Aw=0\% is set, where \%k≥3, a(z)\% is a transcendental entire function.

关键词： meromorphic function differential equation complex oscillation.

On Hyperinvariant Subspaces of Contraction Operators on a Banach Space Whose Spectrum Contains the Unit Circle

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Acta Mathematica Sinica,English Series 2008年第9期24卷 1471-1474页

作者： Ming Xue LIU department of mathematics {2. Polytechnic Normal university Guangzhou 510665 P. R. china department of mathematics Guangdong Polytechnic Normal University Guangzhou 510665 P. R. China

In this paper, we prove that every operator in a class of contraction operators on a Banach space whose spectrum contains the unit circle has a nontrivial hyperinvariant subspace.

关键词： Banach space contraction operator invariant subspace