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- A Reduced Complexity, Improved Frequency Offset Estimation for OFDM-Based WLANs
- This paper presents a reduced complexity frequency offset estimation method as a modification to the nonlinear least square NLS method. The complexity reduction is achieved by utilizing the Chirp-Z transform. At similar complexity, the estimation performance gain, de-fined as the mean square error ratio between the NLS method and the...
- Tags: Method, WLAN, University Of Texas, Training, Complexity Reduction, Workforce Management, OFDM, Wireless LANs, Wireless, Human Resources
- White papers
Additional Resources
- 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
- Complexity is not always bad, only needs to be justified
- There is good complexity and bad complexity. Bad complexity includes infrastructure that has redundant components, that is, multiple types of components to provide the same service. This was addressed in the article. Good complexity includes: 1. business features that are useful and used, 2.infrastructure that is more complex...
- Tags: wdk@...
- Discussion threads 2007-03-19
- Lattice-Reduction-Aided Receivers for MIMO-OFDM in Spatial Multiplexing Systems
- Orthogonal Frequency Division Multiplexing OFDM significantly reduces receiver complexity in wireless broadband systems and therefore has recently been proposed for use in wireless broadband multi-antenna MIMO systems. The performance of maximum likelihood detector in MIMO-OFDM system is optimal, however, its complexity, especially with higher order constellation is prohibitive. A number...
- Tags: Complexity, Performance, MIMO-OFDM, Wireless Broadband, Broadband Internet, Wireless, Telecommunications
- White papers 2004-02-20
- 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
- A Low Complexity Tree Algorithm for PTS-Based PAPR Reduction in Wireless OFDM
- Orthogonal Frequency Division Multiplexing OFDM has several attributes which make it a preferred modulation scheme for high speed wireless communications. However, its high Peak-to-Average-Power Ratio PAPR causes nonlinear distortion thus limiting the efficiency of the transmitter's High Power Amplifier. Among the approaches proposed for PAPR mitigation, the Partial Transmit Sequence...
- Tags: Distortion, Algorithm, IEEE, OFDM, Wi-Fi, Wireless, Productivity
- White papers 2006-04-19
- Adaptive-Mode Peak-to-Average Power Ratio Reduction Algorithm for OFDM-Based Cognitive Radio
- This paper presents a novel low complexity algorithm for reducing the Peak-to-Average Power Ratio PAPR occurring in OFDM-based cognitive radios. Although several PAPR reduction algorithms exist in the literature, they are often only effective for specific scenarios. The proposed algorithm exploits the agility of cognitive radio technology to rapidly choose...
- Tags: Algorithm, Radio, PAPR, OFDM, Engineering, Advertising & Promotion, Wireless, Marketing
- White papers 2006-05-01
- Association of Teachers and Lecturers Learns Value of VMware Virtual Infrastructure
- The Association of Teachers and Lecturers ATL recently implemented VMware virtualisation infrastructure and experienced significant benefits, especially regarding business continuity and disaster recovery. In addition, ATL experienced: 2:1 server consolidation ratio Significant reduction in operational expenses and capital costs Reduction in the time spent provisioning...
- Tags: VMware Inc., Server Consolidation, Servers, Hardware
- White papers 2006-06-01
- 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
- 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
- Space Frequency Codes From Spherical Codes
- A new design method for high rate, fully diverse ('Spherical') space frequency codes for MIMO-OFDM systems is proposed, which works for arbitrary numbers of antennas and subcarriers. The construction exploits a differential geometric connection between spherical codes and space time codes. The former are well studied e.g. in the context...
- Tags: Algorithm, Construction, Lattice, Engineering
- White papers 2005-08-03
- Webcast: Cadbury Schweppes and B2B Process Management
- View this on-demand Webcast to see how Cadbury Schweppes is leveraging B2B Process Management to control the increasing complexity of their trading community -- complexity that's due to acquisition and growth. Find out how managed service providers can accelerate B2B collaboration with supply chain partners and reduce...
- Tags: Finance, Business Operations, Internet, E-business/E-Commerce, Business Structures, Operational Planning, B2B, Cadbury Schweppes Plc., Sterling Commerce, Webcast, Business Process
- Webcasts 2007-10-23
- 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
- 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
- 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
- complexity password windows 2003 sever
- HI all ,I have installed windows 2003 sever and i am facing a problem of password complexity how i can finish the complexity and then i can creat a normal password users.Ajmal hussain minhas
- Tags: ajmalhminhas@..., password
- Discussion threads 2007-05-07
- SAN and NAS
- SAN and NAS are two ways to re-organize a system into a separately managed storage farm and server farm. In theory, separation of the storage and the server is like the tried-and-true “divide and conquer” military strategy that historically enjoyed great success. The end result should be a reduction of...
- Tags: NAS, SAN, FalconStor, Network-Attached Storage (NAS), Storage, Storage Area Networks (SAN), Storage Management, Hardware
- White papers
- 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
- 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
- Reference Frame Optimization for Multiple-Path Video Streaming With Complexity Scaling
- Recent video coding standards such as H.264 offer the flexibility to select reference frames during motion estimation for predicted frames. This paper studies the optimization problem of jointly selecting the best set of reference frames and their associated transport QoS levels in a multipath streaming setting. The application of traditional...
- Tags: Complexity, Optimization, Engineering
- White papers 2007-06-01
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