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- The tale of the tape: 802.11g vs. 802.11b
- Wireless networking has been working its way into themainstream corporate environment for several years. A variety of technologieshave been tried out by the market, with several being kicked to the curb. (Doesanybody remember HomeRF?) To date, the three technologies still in productionare 802.11a, 802.11b, and 802.11g. While 802.11a is slowly...
- Tags: indoor, IEEE 802.11, IEEE 802.11g, James McPherson, wireless networking
- Technical articles 2004-08-19
Additional Resources
- Accurate GSM Indoor Localization
- Accurate indoor localization has long been an objective of the ubiquitous computing research community, and numerous indoor localization solutions based on 802.11, Bluetooth, ultrasound and infrared technologies have been proposed. This paper presents the first accurate GSM indoor localization system that achieves median accuracy of 5 meters in large multi-floor...
- Tags: Springer Science+Business Media, GSM, Indoor Localization, Cellular Phones, Consumer Electronics, Personal Technology
- White papers 2005-07-19
- On Performance of SCH-OFDMA-CDM in Frequency Selective Indoor Environment
- Performance of Sub Carrier Hopped Orthogonal Frequency Division Multiple Access Code Division Multiplexing (SCH-OFDMA-CDM) is analyzed and compared against its non hopping counterpart (OFDMA-CDM) in frequency selective indoor environment. The system model is developed and simulation results for realistic scenarios are presented. These provide guidelines for configuring the system and...
- Tags: Performance, Environment, Scheme, Performance Management, Human Resources, Workforce Management
- White papers
- WiMAX Deployments With Self-Installable Indoor Terminals
- The ability to support the deployment of indoor customer-installable end-user terminals can provide operators significant cost savings that can greatly enhance the business case for a WiMAX fixed broadband wireless network. This paper will provide some insights as to the trade-offs that need to be considered and offer some deployment...
- Tags: WiMAX, Wi-Fi, Wireless
- White papers 2005-06-01
- Indoor Location Technology Opens New Worlds: Micro-Geography
- It's important to solve indoor positioning problems, because by 2005 there will be 184 million U.S. wireless subscribers (Jupiter Research, 2001). Moreover, according to the National Emergency Number Association, more than 30 percent of 911 calls in the United States originate from mobile phones - a number expected to soon...
- Tags: Positioning, Indoor Location Technology, Branding, Marketing
- White papers 2004-10-20
- A Study of Frequency Interference and Indoor Location Sensing With 802.11b and Bluetooth Technologies
- Several technologies such as infrared sensing, radio frequency, ultrasonic and RFIDs have been proposed for indoor location sensing. Each of these methods has its own merits and shortcomings. Recently there has been an increase in the use of commodity wireless technologies like 802.11 or Bluetooth for indoor location positioning. Since...
- Tags: IEEE 802.11, IEEE, Bluetooth, Wireless LANs, Wi-Fi, Wireless
- White papers 2005-04-08
- Quantization and Its Effects on OFDM Concepts for Wireless Indoor Applications
- This paper discusses some fundamental aspects of the implementation of an OFDM modem for wireless indoor applications. One basic component of common OFDM systems is the computation of the DFT. Therefore, some efficient FFT algorithms like the Split-Radix and the Winograd-FFT algorithm have been implemented and their applicability for these...
- Tags: Algorithm, OFDM, Wi-Fi, Wireless
- White papers
- Hockey Pro 2006 (msi)
- TruStorm Hockey Pro 2006 is the only software tool specifically designed for field and indoor Hockey. With a familiar and easy to use interface combined with features for both field and indoor Hockey. Hockey Pro 2006 gives any coach or player at whatever level of computing skill the edge. It...
- Tags: TruStorm Hockey Pro 2006, Productivity, Tools & Techniques, Management
- Software downloads 2007-06-06
- A Study of Bluetooth Propagation Using Accurate Indoor Location Mapping
- The ubiquitous computing community has widely researched the use of 802.11 for the purpose of location inference. Meanwhile, Bluetooth is increasingly widely deployed due to its low power consumption and cost. This paper describes a study of Bluetooth radio propagation using an accurate indoor location system to conduct fine-grained signal...
- Tags: Propagation, Ubiquitous Computing, Springer Science+Business Media, Ubiquitous Computing Community, Bluetooth, Wi-Fi, Wireless
- White papers 2005-07-19
- Multi-Channel Link-Level Measurements in 802.11 Mesh Networks
- Several routing protocols for IEEE 802.11 mesh networks that operate at multiple RF channels have been described before. However, only few facts about link-level characteristics in multi-channel environments have been published. This paper presents observations, made in an indoor testbed, about the impact of channel-assignment on the quality of links....
- Tags: IEEE 802.11, Network, Radio, Association For Computing Machinery, Mesh Networking, Wireless LANs, Advertising & Promotion, Networking, Wireless, Marketing
- White papers 2006-04-07
- Link Assessment in an Indoor 802.11 Network
- This paper presents the empirical results and analysis of a link variability study for an indoor, stationary 802.11 network subject to external interference. The objective is to characterize the relationships between the packet loss rate on a link and the transmitter-receiver distance, the SNR as reported by the 802.11 card,...
- Tags: IEEE 802.11, NIST, Wireless LANs, Wi-Fi, Wireless
- White papers 2006-03-02
- College Expands Educational Horizons Wirelessly
- Founded in 1836, Emory and Henry is the oldest college in southwest Virginia. The company's challenge was to attract new students to the campus through technological leadership; use technology to help facilitate "Active learning" on campus, including outdoor classes; easily manage the wireless network; and mitigate network security risks. A...
- Tags: College, Network, Cisco Systems Inc., Campus, Cisco Unified Wireless Network, Networking, Network Security, Wi-Fi, Wireless, Security
- Case studies 2007-08-01
- Photos: Tasty tech spices up the kitchen
- From spoiled-meat sensors to dirt-free, indoor lettuce patches, these gadgets will have you saying thanks this holiday season.
- Tags: kitchen, sensor, patch management, photograph
- Image galleries 2006-11-19
- A New Level of Visibility for KLM Equipment Services
- KLM Equipment Services, part of KLM Royal Dutch Airlines, is responsible for maintaining a large pool of vehicles at Amsterdam Airport Schiphol, such as fuel trucks, catering trucks and aircraft tractors. KLM identified a number of drivers to streamlining the business. KLM Equipment Services asked LogicaCMG to demonstrate the feasibility...
- Tags: LogicaCMG, KLM, RFID, GPS, Wireless, Security, Biometrics, Consumer Electronics, Personal Technology
- Case studies
- Tennis Elbow 2006 (exe)
- Created by real tennis fans, Tennis Elbow 2006 is a tennis game, featuring both fun and realistic game play. It features also ultra-realistic ball trajectories, artificial intelligence that accurately replicates players' behavior, and a complete range of strikes and game situations. You can play on 7 different grounds clay, grass,...
- Tags: Player, Games, Personal Technology
- Software downloads 2007-10-25
- Tennis Elbow 2006 (zip)
- Created by tennis fans, which are regular ranked players, Tennis Elbow 2006 is the best 2D tennis game for Mac, featuring both fun and realistic gameplay. With its ultra-realistic ball trajectories, an artificial intelligence that accurately replicates players' behavior, and a complete range of strikes and game situations, Tennis Elbow...
- Tags: Player, Games, Personal Technology
- Software downloads 2008-01-11
- A High-Speed Four-Transmitter Four-Receiver MIMO OFDM Testbed: Experimental Results and Analyses
- By adopting Multiple-Input Multiple-Output MIMO and Orthogonal Frequency-Division Multiplexing OFDM technologies, indoor wireless systems could reach data rates up to several hundreds of Mbits/s and achieve spectral efficiencies of several tens of bits/Hz/s, which are unattainable for conventional single-input single-output systems. The enhancements of data rate and spectral efficiency come...
- Tags: MIMO, OFDM, Wireless
- White papers 2005-09-01
- Halo: Combat Evolved War of the Helots map (zip)
- This large multiplayer map for Halo CE has indoor and outdoor areas, vehicles, and is generally designed to satisfy all tastes and gameplay preferences.
- Tags: Combat
- Software downloads 2004-09-08
- Call of Duty Eisberg Map (zip)
- This map for Call of Duty takes place in an Arctic setting and features fast-paced outdoor and indoor combat.
- Tags: Activision Inc.
- Software downloads 2004-04-22
- Call of Duty Vampiric map (zip)
- This is a custom map for Call of Duty. The map features several large structures, indoor and outdoor areas, secret passages and more.
- Tags: Duty, Passage
- Software downloads 2004-06-09
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