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- TCP Probe: A TCP With Built-In Path Capacity Estimation
- Knowing the capacity of an Internet path is important for efficient network utilization, pricing, and management. Using the capacity information, one can provide better TCP congestion control, multimedia streaming, P2P peer selection, and overlay structuring. Capacity estimation has been extensively studied. Though current approaches have been able to provide fast...
- Tags: TCP, Capacity Estimation, TCP Probe Extension, Tcp/Ip, Networking
- White papers 2005-03-03
Additional Resources
- Bandwidth Estimation: Metrics, Measurement Techniques, and Tools
- In a packet network, the terms "Bandwidth" or "Throughput" often characterize the amount of data that the network can transfer per unit of time. Bandwidth estimation is of interest to users wishing to optimize end-to-end transport performance, overlay network routing, and peer-to-peer file distribution. Techniques for accurate bandwidth estimation are...
- Tags: Technique, Georgia Institute Of Technology, Tool, Bandwidth Estimation, Productivity
- White papers 2008-01-01
- Pilot-to-Data Power Ratio for Maximizing the Capacity of MIMO-OFDM
- Orthogonal frequency division multiplexing OFDM can be used with a multiple-input multiple-output MIMO system to improve communication quality and capacity. Pilot-symbol-aided or decision-directed channel estimation must be used to track the variations of the channel. However, while pilot symbols facilitate channel estimation, they reduce the transmit energy for data symbols...
- Tags: MIMO-OFDM, Channel Estimation, OFDM, Wireless
- White papers 2004-11-22
- Project Estimation
- The CS/10,000 project estimation tool suite allows you to generate, manage, and validate estimates of effort for a wide variety of projects. The estimation method uses proprietary AI technology to provide both task and effort based estimation for your project.
- Tags: Estimation, Client-server, Tool, Productivity, Servers, Hardware
- White papers
- Use Case Based Estimation
- For the average develop manager who often do not have the time and resources to do a proper function point count or other estimation this paper offers a basic estimation method using a use case based approach. This idiot's guide to the idiot's guide of estimation is a quick approach...
- Tags: Estimation, Use Case, Software Development, Software/Web Development
- White papers
- A Preliminary Checklist for Software Cost Management
- This paper presents a process framework and a preliminary checklist for software cost management. While most textbooks and research papers on cost estimation look mainly at the "Estimation" phase, this framework and checklist includes the phases relevant to estimation: "Preparation", "Estimation", "Application", and "Learning". The authors believe that cost estimation...
- Tags: Software, Estimation, Checklist, Managerial Accounting, Tools & Techniques, Finance, Management
- White papers 2003-06-30
- AdHoc Probe: Path Capacity Probing in Wireless Ad Hoc Networks
- Knowledge of end-to-end path capacity is useful for video/audio stream adaptation, rate control and overlay design. Capacity estimation in wired and last-hop wireless networks has been extensively investigated, but an in-depth study of path capacity in ad hoc, multihop wireless networks is still lacking. Since the "Capacity" of a wireless...
- Tags: Wireless Network, Path Capacity, Wi-Fi, Wireless
- White papers 2005-05-03
- Channel Estimation for D-BLAST OFDM Systems
- Diagonal Bell Laboratories Layered Space-Time DBLAST structure offers a low complexity solution to realize the attractive capacity of Multiple-Input And Multiple-Output MIMO systems. This paper applies D-BLAST in Orthogonal Frequency Division Multiplexing OFDM systems and addresses the issue of channel estimation. Different from other MIMO-OFDM, where symbols at all tones...
- Tags: Channel Estimation, OFDM, Wireless
- White papers
- Estimation of Carrier-Frequency Offset and Frequency-Selective Channels in MIMO OFDM Systems Using a Common Training Signal
- This paper presents a common training signal design and corresponding estimation methods for carrier frequency offset and frequency-selective channels in MIMO OFDM systems. In designing the common training signal, a training signal structure which yields low complexity estimation methods is developed while the optimality of the training signal is maintained....
- Tags: Estimation, Training, MIMO-OFDM, Estimation Method, Workforce Management, Human Resources
- White papers 2004-09-13
- Improving Channel Estimation in OFDM Systems for Sparse Multipath Channels
- This paper describes an algorithm for sparse channel estimation applicable to orthogonal frequency division multiplexing systems. The proposed algorithm uses a least squares LS technique for channel estimation and a generalized Akaike information criterion to estimate the channel length and tap positions. This effectively reduces the signal space of the...
- Tags: Algorithm, Indian Institute Of Technology, Channel Estimation, OFDM, Engineering, Wireless
- White papers 2005-01-01
- Project Estimation: Use Case Point Technique
- Estimates give an indicator of how long and how much effort is required to complete a project. There are many estimation methods available based upon expert opinion (e.g. Wideband delphi), estimation by analogy - similar projects and also parameterised techniques use case point. This paper presents a brief overview of...
- Tags: Technique, Use Case, Productivity
- White papers
- ICI Cancellation Based Channel Estimation for OFDM Systems
- Orthogonal Frequency Division Multiplexing OFDM), which is a multicarrier modulation scheme, splits high data rate information symbols into lower rate parallel data streams and transmits this parallel information on different orthogonal carriers. The loss of orthogonality among subcarriers causes inter-carrier interference ICI, which affects both channel estimation and detection of...
- Tags: Channel Estimation Error, OFDM, Wireless
- White papers
- Generalized 8-PSK for Totally Blind Channel Estimation in OFDM
- Channel estimation in OFDM systems can conveniently be done by inserting a stream of pilot symbols at the transmitter and by using FIR interpolation filters at the receiver. Most blind channel estimation approaches are based on higher order statistics and converge slowly, making them unsuitable for mobile environments. Moreover, the...
- Tags: Channel Estimation, OFDM, Wireless
- White papers
- SSUPal (exe)
- Chemuturi Consultants offers you a free software estimation tool SSUPal that makes use of Software Size Units SSU. SSU is free from the known drawbacks like complexity and does not specialized training to master the technique. SSUPal is a software tool that assists in Function Point Analysis and FP counting....
- Tags: Software, Consultant, SSUPal, Software Size Units, Tools & Techniques, Management
- Software downloads 2008-03-18
- Comparison of Available Bandwidth Estimation Techniques in Packet-Switched Mobile Networks
- The relative contribution of the transport network towards the per-user capacity in mobile telecommunication systems is becoming very important due to the ever increasing air-interface data rates. Thus, resource management procedures such as admission, load and handover control can make use of information regarding the available bandwidth in the transport...
- Tags: Estimation, Technique, Bandwidth, IEEE, Productivity, Telephony, Telecom & Utilities, Telecommunications, Networking
- White papers 2006-06-12
- Software Estimation: Art, Science, or Science Fiction
- This paper focuses on providing useful rules of thumb and procedures for creating software estimates ("the art of estimation") and a brief introduction to mathematical approaches to creating software project estimates ("the science of estimation"). The paper provides techniques for making sure estimation is treated as an analytical rather than...
- Tags: Software, Estimation, Tools & Techniques, Management
- White papers 2004-09-11
- Fast End-to-End Available Bandwidth Estimation for Real-Time Multimedia Networking
- Dynamic bandwidth estimation serves as an important basis for performance optimization of real-time distributed multimedia applications. The objective of this paper is to develop a bandwidth estimation algorithm for the fast fluctuated Internet. This paper analyzes the relationship between the one way delay and the dispersion of packets train, and...
- Tags: Multimedia, National Chiao Tung University, Bandwidth Estimation, Engineering
- White papers 2006-07-07
- Service-Oriented Grid Computation for Large-Scale Parameter Estimation in Complex Environmental Modeling
- Complex environmental modeling often involves a large number of unknown physical and ecological parameters. Parameter estimation is one of the most difficult steps in many modeling activities. In this paper, the authors present a service-oriented framework, named GGPE-G (Grid-enabled Global optimization for General Parameter Estimation), for efficient parameter estimation in...
- Tags: Estimation, Association For Computing Machinery, Modeling, Parameter Estimation, Research & Development, Business Operations
- White papers 2006-04-27
- 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
- Optimal Training Signals for SISO OFDM Channel Estimation in the Absence/Presence of Frequency Offsets
- All existing training signal designs for channel estimation in OFDM systems assume no frequency offsets. In practice, frequency offset is unavoidable and seriously degrades the performance of OFDM systems. This paper addresses the problem of designing optimal training signals for SISO OFDM channel estimation in the presence of frequency offsets....
- Tags: Training, Channel Estimation, Frequency Offset, OFDM, Workforce Management, Wireless, Human Resources
- White papers 2004-09-13
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