نتایج جستجو برای: computer software cma
تعداد نتایج: 928141 فیلتر نتایج به سال:
This paper presents an efficient meta-heuristic algorithm based on electromagnetism-like method, which has been successfully implemented in multiuser detection problems. The contribution revisits blind multiuser detection for multicarrier code division multiple access systems using a novel combined adaptive step-size constant modulus algorithm (CMA) and electromagnetism-like method scheme. To w...
In this paper, we propose an efficient approximated rank one update for covariance matrix adaptation evolution strategy (CMA-ES). It makes use of two evolution paths as simple as that of CMA-ES, while avoiding the computational matrix decomposition. We analyze the algorithms’ properties and behaviors. We experimentally study the proposed algorithm’s performances. It generally outperforms or per...
This paper considers a cooperative multiple access (CMA) scheme where two full-duplex sources simultaneously send their own messages to common destination. As part of cooperation, each the also receives and relays message from other source. develops algorithms for computing optimal power allocation achieve maximal network throughput subject residual self-interference (RSI) at non-ideal sources....
During the last decade, an adaptive antenna has considerable received the interest for mobile communication systems. This is because it can increase the system capacity by reducing interference. To achieve the interference reduction, an adaptive algorithm is necessary. There are a number of the adaptive algorithms proposed to improve the signal-to-interference plus noise ratio (SINR) in such th...
Multimedia authoring involves specifying the temporal characteristics of the media. In this paper collaborative multimedia authoring (CMA) is advocated and its usage scenarios are described. A system model is presented to address CMA from various levels. The major issues regarding consistency maintenance and temporal characteristics of CMA are identified. An approach using operational transform...
By using a generalized cost function, a modified constant modulus algorithm (CMA) that allows polarization demultiplexing and equalization of polarization-switched QPSK is found. An implementation that allows easy switching between the conventional and the modified CMA is described. Using numerical simulations, the suggested algorithm is shown to have similar performance for polarization-switch...
BACKGROUND Multiple lines of evidence indicate a strong genetic contribution to autism spectrum disorders (ASDs). Current guidelines for clinical genetic testing recommend a G-banded karyotype to detect chromosomal abnormalities and fragile X DNA testing, but guidelines for chromosomal microarray analysis have not been established. PATIENTS AND METHODS A cohort of 933 patients received clinic...
BACKGROUND The diversity in the perceived prevalence, recovery, and risk factors for cow's milk allergy (CMA) necessitated a large-scale, population-based prospective study. OBJECTIVE We sought to determine the prevalence, cross-reactivity with soy allergy, and risk factors for the development of CMA. METHODS In a prospective study the feeding history of 13,019 infants was obtained by means...
Increasing the speed of convergence of the constant modulus algorithm for blind channel equalization
The constant modulus algorithm (CMA) is an excellent technique for blind channel equalization. Recently signed error version of CMA (SE-CMA) and dithered signed error version (DSE-CMA) have been proposed which afford overall computational efficiency. We propose three different error functions for faster convergence. This would be essential for communication systems, which cannot afford a high s...
The covariance matrix adaptation (CMA) is one of the most powerful self adaptation mechanisms for Evolution Strategies. However, for increasing search space dimension N , the performance declines, since the CMA has space and time complexity O(N2). Adapting the main mutation vector instead of the covariance matrix yields an adaptation mechanism with space and time complexity O(N). Thus, the main...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید