Based on sine and cosine functions, the compactly supported orthogonal wavelet filter coefficients with arbitrary length are constructed for the first time. When N = 2(k-1) and N = 2k, the unified analytic constructio...
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Based on sine and cosine functions, the compactly supported orthogonal wavelet filter coefficients with arbitrary length are constructed for the first time. When N = 2(k-1) and N = 2k, the unified analytic constructions of orthogonal wavelet filters are put forward, respectively. The famous Daubechies filter and some other well-known wavelet filters are tested by the proposed novel method which is very useful for wavelet theory research and many application areas such as pattern recognition.
Wavelet analysis and its applications have become one of the fastest growing research areas in the recent years. This is in part attributed to the pioneering work by the researchers as well as practitioners in the fie...
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The classification of two types of DNA sequences is studied in this paper. 20 sample artificial DNA sequences whose types have been known are given to recognize the types of other DNA sequences. Wavelet packet analysi...
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The orthogonal wavelet lowpassed filters coefficients with arbitrary length are constructed in this paper. When N=2k and N = 2k−1, the general analytic constructions of orthogonal wavelet filters are put forward, resp...
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Flow field prediction of a molcfline of the blunt-nose SC-X configuration at very high angles of attack is addressed using two three-dimensional Reynoldsaveraged Navier-Stokes (NS) Solvers: a structured grid solver an...
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This paper presents the design of a linear parameter varying (LPV) controller for the F-16 longitudinal axes over the entire flight envelope using a blending approach which reduces computational costs for synthesizing...
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We present a Markov model for analyzing the performance of parallel/distributed processors that execute a job consisting of N independent tasks in parallel using P processors. The model is a Markov chain with states r...
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We present a Markov model for analyzing the performance of parallel/distributed processors that execute a job consisting of N independent tasks in parallel using P processors. The model is a Markov chain with states representing service and failure rates with k (0
Prototyping in the development cycle claims to improve analyst understanding of system requirements leading to systems which match those requirements more closely. The quality of the end systems, from a user perspecti...
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Prototyping in the development cycle claims to improve analyst understanding of system requirements leading to systems which match those requirements more closely. The quality of the end systems, from a user perspective, is thus improved. In this paper, the results of an empirical investigation into the use of prototyping in the development of various systems is described. Nine processes across eight different sites were analysed and data relating to each process was collected. The notation of Role Activity Diagrams (RADs) was used to capture each of the nine processes. Five hypotheses were then investigated: these related the prototyping role to features of other roles such as extent of interaction during the prototyping process, the effect site size had on the prototyping role and the dependence of the prototyping role on other roles in the prototyping process. Two coupling metrics were introduced to quantitatively analyse these RAD features. Results indicated a strong similarity between large and medium-sized sites in terms of interactions and behaviour. The prototyping process in small sites, however, was found to be different to large and medium-sized sites in both respects. The study demonstrates how measures of business models can aid analysis of the process as well as the products of systems development and highlights the need for more empirical investigation into this and other facets of the software development process.
A new reduced rank multiuser detector (MUD) for DS-CDMA is presented. The algorithm is derived for the general case of an asynchronous DS-CDMA system in frequency selective multipath. The MUD solution is shown to be e...
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A new reduced rank multiuser detector (MUD) for DS-CDMA is presented. The algorithm is derived for the general case of an asynchronous DS-CDMA system in frequency selective multipath. The MUD solution is shown to be equivalent to a bank of parallel, single user detectors. The algorithm is implemented in reduced rank form using the correlations subtractive algorithm of the multistage Wiener filter (CSA-MWF). It is shown that the CSA-MWF implementation performs identically to the full rank solutions of MMSE MUD and meets single user, full rank performance at a substantially reduced rank for all levels of system load.
A novel, low complexity, reduced rank multiuser detector (MUD) for DS-CDMA is presented. The solution is derived for the general case of an asynchronous DS-CDMA system in frequency selective multipath. The joint MUD s...
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ISBN:
(纸本)078037147X
A novel, low complexity, reduced rank multiuser detector (MUD) for DS-CDMA is presented. The solution is derived for the general case of an asynchronous DS-CDMA system in frequency selective multipath. The joint MUD solution is shown to be equivalent to a bank of parallel, single user detectors, previously shown only for synchronous users. The algorithm is implemented in low complexity form, using the efficient correlations subtractive architecture of the reduced rank multistage Wiener filter (CSA-MWF). The reduced rank algorithm is not based on an eigen-decomposition, which requires the signal subspace rank to be greater than or equal to the number of signals present in the system, and is shown to be nearly independent of the number of signals. It is shown that the joint and parallel CSA-MWF implementations perform identically to the full rank MMSE MUD and approaches single user, full rank performance at significantly reduced ranks. Bit error rate (BER) performance, as a function of rank, signal-to-noise ratio, number of users, code type and synchronism among the codes, is analyzed.
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