نتایج جستجو برای: fading window

تعداد نتایج: 82238  

2002
Francesca Vatta Guido Montorsi Fulvio Babich

Abstract— In this work, the performance of turbo codes over the Rice multiplicative fading channel is evaluated through analysis and simulation. The analysis is conducted through improved upper bounds on bit error probabilities in conjunction with both the fully interleaved channel and the correlated Rice slow fading channel. The analytical expression of the improved bound is obtained by extend...

Journal: :Journal of applied behavior analysis 2010
Kristi D Rivas Cathleen C Piazza Meeta R Patel Melanie H Bachmeyer

Little is known about the characteristics of meals that serve as motivating operations (MOs) for escape behavior. In the current investigation, we showed that the distance at which a therapist held a spoon from a child's lips served as an MO for escape behavior. Based on these results, we implemented spoon distance fading, compared fading with and without escape extinction (EE), and compared fa...

2012
S Anuradha KVSS Reddy S Sri Gowri

The coherent reception of Direct Sequence Code Division Multiple Access(DSCDMA) signals in a multipath fading channel is considered. The channel model assumes independent paths with Nakagami fading statistics. This model includes the Rayleigh channel as a special case and a reasonable model for a frequency selective fading channel. The bit error rate(BER) performance of a RAKE receiver under va...

Journal: :IEEE Trans. Information Theory 1998
Ezio Biglieri John G. Proakis Shlomo Shamai

In this paper we review the most peculiar and interesting information-theoretic and communications features of fading channels. We first describe the statistical models of fading channels which are frequently used in the analysis and design of communication systems. Next, we focus on the information theory of fading channels, by emphasizing capacity as the most important performance measure. Bo...

1997
L. H. Nam

The paper presents a technique to transmit 16QAM signals in mobile radio environments. The conventional method for compensating the multipath fading e ect using pilot symbol assisted modulation (PSAM) is extended, employing not only the pilot symbols but also the previously estimated fading values for evaluating the fading in the current frame. The main results of this paper are the symbol erro...

2003
Nikolay KOSTOV

In this paper, a MATLAB based approach for mobile radio channels modeling is presented. Specifically, the paper introduces the basic concepts for modeling flat fading channels in MATLAB by means of user-defined mfiles. Typical small-scale fading channel models are derived such as uncorrelated Rician fading channel and Rayleigh fading channel with Doppler shift. Further, simple and useful MATLAB...

Journal: :international journal of electrical and electronics engineering 0
mahdi fathi department of aerospace engineering, malek ashtar university of technology nematollah ghahramani faculty/ department of electrical engineering, malek ashtar university of technology mohammad ali shahi ashtiani faculty/ department of aerospace engineering, malek ashtar university of technology mohsen fallah faculty/ department of electrical engineering, malek ashtar university of technology ali mohammadi faculty/department of aerospace engineering, malek ashtar university of technology

against the range-dependent accuracy of the tracking radar measurements including range, elevation and bearing angles, a new hybrid adaptive kalman filter is proposed to enhance the performance of the radar aided strapdown inertial navigation system (ins/radar). this filter involves the concept of residual-based adaptive estimation and adaptive fading kalman filter and tunes dynamically the fil...

Journal: :CoRR 2011
Aravindh Krishnamoorthy L. Srikar Muppirisetty Ravi Jandial

The performance of MMSE Iterative Equalization based on MAP-SBVP and COD-MAP algorithms (for generating extrinsic information) are compared for fading and non-fading communication channels employing serial concatenated convolution codes. MAP-SBVP is a convolution decoder using a conventional softMAP decoder followed by a soft-convolution encoder using the soft-boolean value propagation (SBVP). ...

Introduction: In radionuclide imaging, object scatter is one of the major factors leading to image quality degradation. Therefore, the correction of scattered photons might have a great impact on improving the image quality. Regarding this, the present study aimed to determine the main and sub-energy windows for triple energy window (TEW) scatter correction method usin...

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