An Improved Approximation for the Gaussian Q-Function
نویسندگان
چکیده
منابع مشابه
Improved Gaussian Approximation
In a recently developed approximation technique [1] for quantum field theory the standard one-loop result is used as a seed for a recursive formula that gives a sequence of improved Gaussian approximations for the generating functional. In this paper we work with the generic φ3+φ4 model in d = 0 dimensions. We compare the first, and simplest, approximation in the above sequence with the one-loo...
متن کاملAn Improved Gaussian Approximation for Quantum Field Theory
We present a new approximation technique for quantum field theory. The standard one-loop result is used as a seed for a recursive formula that gives a sequence of improved Gaussian approximations for the generating functional. In a different setting, the basic idea of this recursive scheme is used in the second part of the paper to substantialy speed up the standard Monte Carlo algorithm. http:...
متن کاملAn Improved Gaussian Approximation for Quantum Field Theory Udc:530.145
We present a new approximation technique for quantum field theory. The standard one-loop result is used as a seed for a recursive formula that gives a sequence of improved Gaussian approximations for the generating functional. In a different setting, the basic idea of this recursive scheme is used in the second part of the paper to substantialy speed up the standard Monte Carlo algorithm.
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This paper presents a new approach that combines two well-known approximations in order to improve the approximation accuracy of the Gaussian Q-function. Differential evolution, which can be considered as a simple and efficient evolutionary algorithm for optimizing real-valued optimization problems, is applied to estimate the parameters of the new approximation. The results produced by the pres...
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The two-dimensional (2-D) Gaussian Q-function has been used in evaluating the error and outage probability performance of wireless communication systems. The 2-D Gaussian Q-function representation has been proposed to compute the probability of an arbitrary wedge-shaped region in the presence of additive white Gaussian noise (AWGN) [1]-[5]. Alouini and others developed the 2-D Gaussian Q-functi...
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ژورنال
عنوان ژورنال: IEEE Communications Letters
سال: 2007
ISSN: 1089-7798
DOI: 10.1109/lcomm.2007.070470