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Performance Comparison of Intrusion Detection System Classifiers Using Various Feature Reduction Techniques: This paper compares the performance of Intrusion Detection System IDS Classifiers using various feature reduction techniques. To enhance the learning capabilities and reduce the computational intensity of competitive learning neural network classifiers, different dimension reduction techniques have been proposed. These include: Principal Component Analysis, Linear Discriminant Analysis, and Independent Component...; Tags: Technique, Performance, Neural Network, Intrusion Detection System, Erode Sengunthar Engineering College, Reduction Technique, Intrusion Detection, Productivity, Network Security, Performance Management, Security, Networking, Human Resources, Workforce Management; White papers 2008-01-31

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A Novel Technique for SNMP Bandwidth Reduction: Simulation and Evaluation: One of the most popular and widely used Network Management Protocols NMP is SNMP. SNMP is extremely simple and versatile but it has scalability problems. A number of alternative NMPs such as RMI interfaces, CORBA and RMON have been attempted to overcome the problems with SNMP. However, these interfaces lack...; Tags: Technique, SNMP, Network Administration, Networking, Productivity; White papers 2008-02-01
Modified Selected Mapping Technique for PAPR Reduction of Coded OFDM Signal: High peak-to-average power ratio PAPR of the transmitted signal is a major drawback of orthogonal frequency division multiplexing OFDM. This paper proposes a modified selective mapping SLM technique for PAPR reduction of coded OFDM signal. In this technique the phase sequence is embedded which is used to lower the PAPR...; Tags: Technique, OFDM, Productivity, Wireless; White papers 2004-09-01
Microarchitecture-Based Introspection: A Technique for Transient-Fault Tolerance in Microprocessors: This paper proposes Microarchitecture-Based Introspection MBI, a transient-fault detection technique, which utilizes the wasted processing bandwidth during long-latency cache misses for redundant execution of the instruction stream. MBI has modest hardware cost, requires minimal modifications to the existing microarchitecture, and is particularly well suited for memory-intensive applications. The evaluation reveals...; Tags: Technique, University Of Texas, Microprocessor, Evaluation, Microarchitecture Based Introspection, Productivity; White papers
On Orthogonal Reduction to Hessenberg Form With Small Bandwidth: Numerous algorithms in numerical linear algebra are based on the reduction of a given matrix A to a more convenient form. One of the most useful types of such reduction is the orthogonal reduction to upper Hessenberg form. This reduction can be computed by the Arnoldi algorithm. When A is...; Tags: Bandwidth, Matrix, Reduction, Hessenberg, Engineering; White papers 2008-06-12

Peak-to-Average Power Ratio Reduction of OFDM Signals Using Pulse Shaping: This paper proposes an efficient technique for reducing the PAPR of OFDM signals. The proposed technique is very effective and avoids the use of extra Inverse Fast Fourier Transformations IFFTs as was done in some previously published techniques but instead is based on a proper selection of the time-limited waveforms...; Tags: Technique, Waveform, OFDM, Productivity, Wireless; White papers
Globally Optimal Tradeoff Curves for OFDM PAR Reduction: This paper describes an efficient convex optimization technique for computing the globally optimal tradeoff curves between OFDM peak-to-average power ratio PAR, constellation error, and free carrier power. The OFDM system designer can select a suitable PAR reduction method by comparing the achieved performance of various algorithms with these optimal tradeoff...; Tags: Stanford University, Tradeoff, OFDM, Wireless; White papers 2004-12-01
Peak-to-Average Power Ratio Reduction in OFDM With Blind Selected Pilot Tone Modulation: Orthogonal Frequency Division Multiplexing OFDM is a spectrally efficient multicarrier modulation technique for high speed data transmission over multipath fading channels. However, the price paid for the high spectral efficiency is low power efficiency. OFDM signals suffer from high Peak-to-Average power Ratios PARs which lead to power inefficiency in the...; Tags: Technique, OFDM, Productivity, Wireless; White papers 2005-08-04
Spatio-Temporal Video Transcoder for Streaming Over Mobile Communications Networks: Video transcoding technique is an efficient mechanism to deliver visual contents to a variety of users who have different network conditions or terminal devices with different display capabilities. This paper proposes two types of transcoding methods for adapting the bitrate of streaming video to the bandwidth of the transmission channel;...; Tags: Method, Mobile, Video, Corporate Communications, Web Site Development, Web Technology, Productivity, Digital Video, Marketing, Internet, Personal Technology; White papers 2006-04-08
Dynamic Selected Mapping for OFDM: Orthogonal Frequency Division Multiplexing OFDM transmission systems generally have low power efficiency, due to the large Peak-to-Average power Ratio PAR of the OFDM signal. SeLected Mapping SLM is a promising technique to reduce the PAR for OFDM. A drawback of SLM is its high computational requirement, which hinders its practical...; Tags: OFDM, Wireless; White papers 2005-07-01
PAPR Reduction in OFDM Systems Using Constellation Shaping: Orthogonal Frequency Division Multiplexing OFDM is a multicarrier transmission technique, which is widely adopted in different communication applications. OFDM prevents Inter Symbol Interference ISI by inserting a guard interval and mitigates the frequency selectivity of a multi-path channel by using a simple equalizer. This simplifies the design of the receiver...; Tags: OFDM, Wireless; White papers
Noise Reduction (exe): The Noise Reduction plug-in collection is a series of four professional-level, DirectX, sound restoration plug-ins: Vinyl Restoration, Noise Reduction, Clipped Peak Restoration, and Click and Crackle Removal plug-ins. Save valuable time and money by applying the Noise Reduction processing power to salvage vintage vinyl recordings, and rescue problem tracks. For...; Tags: Plug-in, Noise Reduction Plug-in Collection, Plug-in Collection; Software downloads 2006-06-21
A Low Complexity Antenna Diversity Receiver for OFDM Based Systems: A low complexity antenna diversity architecture with a new combining technique suitable for Orthogonal Frequency Division OFDM based systems is introduced in this paper. For a two branch antenna diversity, this structure requires only one FFT at the receiver and allows optimum maximum ratio combining. For systems with a higher...; Tags: Technique, OFDM, Productivity, Wireless; White papers
Integer-Based Constellation Shaping Method for PAPR Reduction in OFDM Systems: In this paper, the problem of reducing the Peak to Average Power Ratio PAPR in an Orthogonal Frequency Division Multiplexing OFDM system is considered. This paper designs a cubic constellation, called the Hadamard constellation, whose boundary is along the bases defined by the Hadamard matrix in the transform domain. Then,...; Tags: Technique, Constellation, OFDM, Productivity, Wireless; White papers 2005-08-05
On the Reduced Complexity Interleaving Method for OFDM PAPR Reduction: Many methods for OFDM Peak to Average Power Ratio reduction have been proposed during approximately last ten years. There are nowadays many research efforts on PAPR reduction methods with reduced computational complexity. The method presented in this paper is based on adaptive symbol selection principle, with several replicas of signal...; Tags: Method, OFDM, Wireless; White papers 2006-09-01
Optimal Superimposed Pilot Selection for OFDM Channel Estimation: This paper presents an optimal strategy for utilizing superimposed pilots for OFDM channel estimation using Wiener filtering. An algorithm is formulated to determine the optimal rectangular set of time-frequency samples for channel estimation for a given complexity. The proposed scheme shows an improved performance at high Doppler frequencies. Moreover, the...; Tags: Algorithm, Performance, Channel Estimation, OFDM, Performance Management, Productivity, Wireless, Human Resources, Workforce Management; White papers 2006-04-19
Measuring the results of an acquisition: Measurement pitfallHaving measurable goal is a desire for operation management and IT manager to make the contribution value more visible . However, sometimes, the suggested scorecard is as good as assuming that the resulting integration always result in reduction in reduction in IT expense % etc. It may not...; Tags: vvwong; Discussion threads 2005-11-18
Reduce Compliance Costs by Baselining Spend, Prioritizing Effort & Automating Technical & Procedural Evidence Collection: New Symantec Survey results demonstrate that for Fiscal Year 2008, 30% of Fortune 1000 companies surveyed have budgeted projects for cost and risk reduction through compliance automation. During this webcast, the presenters will talk through the business drivers behind compliance automation, how to baseline the current compliance spend, how to...; Tags: Symantec Corp., Compliance; Webcasts 2008-05-16
Two-Stage Variable Clustering for Large Data Sets: In data mining, principal component analysis is a popular dimension reduction technique. It also provides a good remedy for the multicollinearity problem, but its interpretation of input space is not as good. To overcome the interpretation problem, principal components cluster components are obtained through variable clustering, which was implemented with...; Tags: Component, Clustering; White papers 2008-02-15
The Effectiveness of Signal Clipping for PAPR and Total Degradation Reduction in OFDM Systems: Signal clipping has been suggested as an effective Peak-to-Average Power Ratio PAPR reduction scheme for orthogonal frequency-division multiplexing OFDM. This paper analyzes clipped M-ary differentially encoded phase-shift keying (M-DPSK) OFDM. The impact of Input Power Backoff IBO of a nonlinear Power Amplifier PA is evaluated. An effective PAPR reduction scheme...; Tags: Reduction, OFDM, Wireless; White papers 2005-01-01

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