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- Optimum Multi-Coded OFDM Transmission
- This paper is devoted to multi-coded OFDM transmission over fading channels. An optimum strategy of coding, power and modulation selection is proposed. The presented code, modulation and power loading algorithm is designed to maximize the system throughput, at the assumption of the Channel State Information CSI known to the transmitter....
- Tags: Transmission, OFDM, Wireless
- White papers
- How to Outperform IEEE 802.11: Interference Aware (IA) MAC
- Wireless networks are nowadays very popular. They are mostly based on IEEE 802.11 protocol which is known to show low performance in ad hoc networks. Also when infrastructured networks many access points are placed are considered, a single transmission could block many radio cells. This paper proposes Interference Aware IA...
- Tags: IEEE 802.11, Network, Transmission, University Of California, Idea, Wireless LANs, Wi-Fi, Wireless, Networking
- White papers
- Transmission (dmg)
- Transmission has been built from the ground up to be a lightweight, BitTorrent client. Its simple, intuitive interface is designed to integrate tightly with whatever computing environment you choose to use. Transmission strikes a balance between providing useful functionality without feature bloat. Furthermore, it is free for anyone to use...
- Tags: Transmission, Performance Management, Human Resources, Workforce Management
- Software downloads 2008-05-27
- SafeInput Control (zip)
- SafeInput Control, is an efficient and reliable Internet Security component Web sites and Windows based online applications. It provides confidentiality and integrity on Client-side. In other words, unauthorized users cannot capture any transmissions from customer to company and information are not altered during transmission. By deploying SafeInput, websites will be...
- Tags: Credit Card, Web Site, Transmission, ECOMSO, Web Site Development, Sales Channel, Web Technology, Viruses And Worms, Cyberthreats, Financial Services, Security, Internet, Sales
- Software downloads 2008-04-16
- The Wake County Public School System Uses Biscom Delivery Server (BDS) To: Ensure Privacy of Student and Employee Files, Comply With the Family Educational Rights and Privacy Act and Eliminate Transmission of Unsecured Email Transmissions
- The Wake County Public School System WCPSS is one of the twenty largest school districts in the nation. WCPSS's challenge primarily focused on ensuring privacy protection of confidential information. Despite the fact that both student, and employee, records contained sensitive information that needed to be sent securely, regulatory compliance was...
- Tags: Privacy, Transmission, Biscom, WCPSS, E-mail, Regulatory Compliance, Security, Online Communications, Human Resources, Policies And Procedures
- Case studies 2008-03-28
- Alfa Romeo 156 GTA Screensaver 1 (zip)
- The Alfa Romeo 156 GTA and Sportwagon GTA were launched at the Frankfurt Motor Show. Equipped with a 3.2 L V6 with six-speed manual transmission or six-speed Selespeed (paddles in steering wheel, hydraulically operated clutchless manual gearbox), the GTA variants were aimed at the performance market. This version is the...
- Tags: Variant, Transmission, Performance Management, Human Resources, Workforce Management
- Software downloads 2007-11-28
- Multi-gigabit wireless coming within three years
- According to Press Esc, a team of Georgia Tech scientists working at the institute's Georgia Electronic Design Center GEDC expressed confidence that their research into multi-gigabit wireless technology will be able to yield commercially viable products within three years. Multi-gigabit wireless technology uses extremely high radio frequencies...
- Tags: IEEE, Downside, Transmission, Wi-Fi, Wireless, Paul Mah
- Blog posts 2007-07-20
- On Scheduling and Real-Time Capacity of Hexagonal Wireless Sensor Networks
- Since wireless ad-hoc networks use shared communication medium, accesses to the medium must be coordinated to avoid packet collisions. Transmission scheduling algorithms allocate time slots to the nodes of a network such that if the nodes transmit only during the allocated time slots, no collision occurs. For real-time applications, by...
- Tags: Algorithm, University Of Virginia, Network, Collision, Sensor, Transmission, Engineering, Wi-Fi, Networking, Wireless
- White papers 2007-04-21
- Geek Trivia: Alien evaders
- What does the 6EQUJ5 code mean in reference to SETI's famous "WOW!" signal? Editor's note: The Trivia Geek is once again shirking his duties, so he phoned in this Classic Geek, which originally ran on Aug. 17, 2005, to tide you over. To those gallantly optimistic...
- Tags: Jay Garmon, Jerry Ehman, Geek Trivia Newsletter, TechRepublic Inc., Signal, Quibble, Radio, Editor, Transmission, WOW, Advertising & Promotion, Marketing
- Technical articles 2006-09-19
- Spatial Multiplexing for Outdoor MIMO-OFDM Systems With Limited Feedback Constraint
- This paper proposes a spatial multiplexing technique for the downlink of a Multiple-Input-Multiple-Output MIMO Orthogonal-Frequency-Division-Multiplexing OFDM system. For outdoor environments with a limited angular spread at the base station, the proposed technique is able to separate the users' streams through a joint spatial processing at both the transmitter and the...
- Tags: Technique, Uppsala University, MIMO-OFDM, Transmission, Productivity, OFDM, Wireless
- White papers 2006-02-22
- Cooperative STBC-OFDM Transmissions With Imperfect Synchronization in Time and Frequency
- This paper studies the cooperative STBC-OFDM transmissions when the cooperative transmitters are not perfectly synchronized in time and carrier frequency. While OFDM can effectively resolve the limited delay asynchronism among the transmitters, the asynchronism in carrier frequency presents a major hurdle. Based on an approximate channel model, the paper analyzes...
- Tags: Transmitter, Transmission, OFDM, Wireless
- White papers 2005-11-25
- Comparison of Transmission Schemes for Framed ALOHA Based RFID Protocols
- The performance of RFID anti-collision protocols that are based on framed ALOHA depends on a transmission scheme that controls access to the shared channel. This paper outlines the characteristics of the RFID domain that impact the performance of such transmission schemes and compares four different transmission strategies. A novel technique...
- Tags: ETH Zurich, Performance, Transmission, RFID, Performance Management, Wireless, Security, Biometrics, Human Resources, Workforce Management
- White papers 2005-11-06
- On the Impact of Beamforming on Interference in Wireless Mesh Networks
- For a wireless mesh network with randomly placed devices, the paper analyzes the impact of beamforming on the statistics of the signal attenuation, interference, and SIR between devices. This paper shows that simple random direction beamforming performs equally well as omni-directional transmission if no MAC layer is present. Optimized beamforming...
- Tags: MAC, Network, Transmission, Wireless, Mesh Networking, Networking
- White papers 2005-10-31
- Transmission Control Scheme for Fast RFID Object Identification
- This paper presents a transmission control strategy for RFID anti-collision protocols that are based on framed ALOHA. The scheme specifically addresses characteristics of the RFID domain such as the strong capture effect and it also makes no restrictive assumptions on channel traffic. Experimental evidence and simulation results are presented showing...
- Tags: ETH Zurich, Transmission, RFID, Wireless, Security, Biometrics
- White papers 2005-09-12
- A Long Lifetime Transmission-Only Active RFID Systems
- This paper presents a design of N-ary Pulse Position Modulation active RFID system for monitoring of large number and high density objects. The transmission-only tags chirp burst frames in pure ALOHA manner. A burst frame consists of delimiter and at least two duplication blink units. The slot mapping and intervals...
- Tags: Transmission, RFID, Wireless, Security, Biometrics
- White papers 2005-08-09
- Energy-Efficient Cooperative Transmission Over Multiuser OFDM Networks: Who Helps Whom and How to Cooperate
- Cooperative transmission has been shown to be able to greatly improve the system performance by exploring the broadcasting nature of wireless channels and cooperation among users. While most of existing works concentrate on improving the peer-to-peer link quality, this paper focuses, on resource allocation among users such that the system...
- Tags: Power Management, System Performance, Transmission, OFDM, Wireless
- White papers 2005-02-09
- Throughput Enhancement of IEEE 802.11 WLAN Via Frame Aggregation
- The popular IEEE 802.11 WLAN is known to achieve relatively small throughput performance compared to the underlying PHYsical layer PHY transmission rate. This is due mainly to the large overheads composed of Medium Access Control MAC header, PHY preamble/header, backoff time, ACKnowledgement ACK transmission, and some Inter-Frame Spaces IFSs. Since...
- Tags: IEEE 802.11, Seoul National University, Aggregation, Transmission, IEEE 802.11 WLAN, Wireless LANs, Wi-Fi, Wireless
- White papers 2004-07-07
Additional Resources
- GSM Vocoders Improve Speech Transmission
- With the current focus on high-speed packet data transmission, it is easy to forget that the primary purpose of GSM digital telecom systems was for speech transmission. The key principle behind the coders used in the GSM system is the mathematical modeling of the human vocal tract, leading to an...
- Tags: GSM, Cellular Phones, Telephony, Telecommunications, Consumer Electronics, Personal Technology, Networking
- White papers 2004-10-26
- The Power Line Transmission Characteristics for an OFDM Signal
- This paper measures what influence the sinusoidal transmission characteristics of the electric power line with various forms gave to the transmission characteristic of OFDM Orthogonal Frequency Division Multiplexing signal through PLC Power Line Communication System modem. The electric power line transmission line with various forms in a real environment is...
- Tags: Powerline, Transmission Characteristic, OFDM, Wireless
- White papers 2006-05-26
- Select the appropriate transmission media for your network
- Transmission media are the physical pathways that connect computers, other devices, and people on a network. Each transmission medium requires specialized network hardware that is compatible with that medium, and most networks need to use combination of transmission media types selected based on the network's needs and prevailing...
- Tags: Network, Media, Addison-Wesley, Networking, Network Technology
- Book chapters 2007-01-30
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