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- Scale-Lag Diversity Reception in Mobile Wideband Channels
- This paper considers the effect of mobility on a wideband Direct Sequence Spread Spectrum DSSS communication system, and study a scale-lag Rake receiver capable of leveraging the diversity that results from mobility. A wideband signal has a large bandwidth-to center frequency ratio, such that the typical narrowband Doppler spread assumptions...
- Tags: UWB, Channel, Mobile, Radio Frequency, Ohio State University, Ultrawideband (UWB), Advertising & Promotion, Network Technology, Wireless, Marketing, Networking
- White papers
- Fixed-Point Modeling Using Simulink & the Signal Processing Blockset (UWB)
- Simulink, when combined with the Signal Processing Blockset, enables engineers to quickly and effectively create bit-accurate product-level and algorithm-level specifications. This webinar will explore finite word length effects on system performance and other design trade-offs when moving from floating-point to fixed-point data types. Using an application example based on the...
- Tags: UWB, Signal Processing, MathWorks, Ultrawideband (UWB), Wireless
- Webcasts
- Convergence Analysis of Iteratively Detected Time Hopping and DS-CDMA Ultrawide Bandwidth Systems by EXIT Charts
- This paper presents a novel analysis on the decoding convergence of Time Hopping TH and Direct Sequence DS Code-Division Multiple-Access CDMA Ultrawide Bandwidth UWB systems when communicating over multipath Nakagami channels. The analysis is based on the Extrinsic Information Transfer EXIT chart where the UWB systems are serially concatenated pulse-position...
- Tags: UWB, Analysis, Convergence, Ultrawideband (UWB), Wireless
- White papers 2008-04-15
- On the Relation Between Bandwidth and Robustness of UWB Channel in Complex Confined Areas
- Ultra-Wideband UWB communication has been the subject of extensive research in recent years due to its unique capabilities and potential applications, particularly in short-range multiple access wireless communications. However, many important aspects of UWB-based communication systems have not yet been thoroughly investigated. The propagation of UWB signals is the single...
- Tags: UWB, Bandwidth, Universite Laval, Ultrawideband (UWB), Wireless
- White papers 2007-07-28
- Ultra High-Speed and Ultra Low-Noise InP HEMTs
- InP-based High Electron Mobility Transistors InP HEMTs exhibit a record current-gain cutoff frequency of beyond 500 GHz and an ultra low noise figure of less than 2 dB even at 100 GHz. Consequently, they are regarded as key devices for next-generation wired/wireless communication systems and precision sensors. This paper describes...
- Tags: UWB, Sensor, Fujitsu Ltd., Ultrawideband (UWB), Wireless
- White papers 2007-10-01
- Ultrawideband Wireless Solutions
- The presentation provides an overview of Ultrawidband usage model and technologies and provides technical solutions to coexistence with WiMAX and WiFi on mobile platforms. It also provides an update on Intel Ultrawideband technology roadmap.
- Tags: UWB, Mobile, Intel Corp., Presentation, Ultrawideband (UWB), WiMAX, Wireless
- Presentations 2006-09-27
- High-Resolution Ultrawideband SAR Based on OFDM Architecture
- This white paper addresses the proposal of research aimed at the development of detailed model-based description of high-resolution potentially jamming-resistant portable Synthetic Aperture Radar SAR system with rapid radar image transmission capabilities for complete battle-scene reconstruction. High resolution of obtained imagery and resistivity to certain types of jamming will be...
- Tags: UWB, High-resolution, Transceiver, OFDM, Ultrawideband (UWB), Wireless
- White papers 2006-08-22
- Concatenated RS-Convolutional Codes for Ultrawideband Multiband-OFDM
- This paper investigates the performance of concatenated Reed Solomon and convolutional RSconvolutional codes for UltraWideBand UWB MultiBand Orthogonal Frequency Division Multiplexing (MB-OFDM) systems. This paper show that RS-convolutional codes perform better than single codes at high energy-per-bit to noise ratio (Eb/No). The paper also show that using a bit interleaver...
- Tags: UWB, University Of Oxford, Ultrawideband (UWB), Wireless
- White papers 2006-07-09
- Performance Analysis and Range Improvement in Multiband-OFDM UWB Communications
- The performance of multiband-OFDM UWB systems is analyzed using the S-V indoor channel model. Based on the analysis, two methods are proposed to improve the reliable transmission range of UWB devices by exploiting the rich spectral and spatial diversity available in the system. It is shown both by theory and...
- Tags: UWB, Performance, IEEE, Ultrawideband (UWB), Performance Management, Productivity, Wireless, Human Resources, Workforce Management
- White papers 2006-06-09
- Analysis and Practical Comparison of Wireless LAN and Ultra-Wideband Technologies for Advanced Localization
- In this paper the authors compare the capabilities of Wireless LAN and Ultra-Wideband to enable advanced localization systems. The two technologies are compared regarding their suitability towards time-delay-estimation by theoretical bounds as well as by means of practical time-of-flight range estimation in Line-Of-Sight LOS and Non-Line-Of-Sight NLOS conditions in an...
- Tags: UWB, WLAN, Analysis, Ultrawideband (UWB), LANs, Wireless LANs, Wi-Fi, Wireless, Networking
- White papers 2006-05-08
- Bluetooth Picks WiMedia UWB for High Speed
- The Bluetooth Special Interest Group SIG announced that the flavor of ultrawideband wireless called MultiBand Orthogonal Frequency Division Multiplexing (MB-OFDM), backed by the WiMedia Alliance industry group, will be integrated into Bluetooth. The Bluetooth SIG Core Specification Working Group Charter and UWB Feature Requirements Document FRD will commence immediately, but...
- Tags: UWB, Jupitermedia Corp., Ultrawideband (UWB), Bluetooth, Wi-Fi, Wireless
- White papers 2006-03-29
- Precise Timing for Multiband OFDM in a UWB System
- Precise positioning is one attractive application of Ultra WideBand UWB systems. Its enormous bandwidth has generated high expectation on the spatial resolution that it could achieve. However, synchronization in the presence of dense multipath is challenging, since the first arrival is not necessarily the strongest one due to channel fading....
- Tags: UWB, Positioning, Ultrawideband (UWB), OFDM, Wireless
- White papers 2006-03-24
- Multiband-OFDM MIMO Coding Framework for UWB Communication Systems
- The emerging UltraWideBand UWB system offers a great potential for the design of high speed short-range wireless communications. In order to satisfy the growing demand for higher data rates, one possible solution is to exploit both spatial and multipath diversities via the use of Multiple-Input Multiple-Output MIMO and proper coding...
- Tags: UWB, Ultrawideband (UWB), Wireless
- White papers 2006-01-01
- Use of Cognitive Radio Techniques for OFDM Ultrawideband Coexistence With WiMax
- This paper explores the issues in coexistence between Broadband Fixed Wireless Access, also know as WiMax or 802.16e, and Ultrawideband UWB, specifically the multiband OFDM form of UWB as promoted by the WiMedia trade group. A multiband OFDM receiver can operate as a channelized radiometer to detect emissions from WiMax...
- Tags: UWB, Radio, Ultrawideband (UWB), WiMAX, OFDM, Wi-Fi, Wireless
- White papers 2005-10-14
- On the Design of Robust Multiband OFDM Ultra-Wideband Receivers
- This paper analyzes the effects of NarrowBand Interferences NBI on the performance of a Multi-Band Orthogonal Frequency Division Multiplexing (MB-OFDM) Ultra-WideBand UWB receiver and proposes efficient schemes for signal reception and extraction of information in the presence of NBI. A study to assess the effects of NBI on the quantization...
- Tags: UWB, Texas A&M University, NBI, Ultrawideband (UWB), Wireless
- White papers 2005-10-14
- System Design Considerations for Ultra-Wideband Communication
- This paper discusses issues associated with high-data-rate pulsed ultra-wideband system design, including the baseband processing, transmitter, antenna, receiver, and analog-to-digital conversion. A modular platform is presented that can be used for developing system specifications and prototyping designs. This prototype modulates data with binary phase shift keyed pulses, communicates over a...
- Tags: UWB, Platform, Ultrawideband (UWB), Wireless
- White papers 2005-08-01
- Ultra-Wideband (UWB Technology): Enabling High-Speed Wireless Personal Area Networks
- Ultra-WideBand UWB technology offers a solution for the bandwidth, cost, power consumption, and physical size requirements of next-generation consumer electronic devices. UWB enables wireless connectivity with consistent high data rates across multiple devices and PCs within the digital home and the office. This emerging technology provides the high bandwidth that...
- Tags: UWB, Ultrawideband (UWB), Wireless
- White papers 2005-02-01
- Consultation Paper on the Introduction of Wireless Systems Using Ultra-Wideband Technology
- It has been the Canadian experience that consumers and business have a strong interest in adopting new wireless products and in having access to the latest technology and applications, so as to increase productivity and improve the standard of living. The intent of this paper, announced in Gazette Notice SMSE-002-05,...
- Tags: UWB, Ultrawideband (UWB), Wireless
- White papers 2005-02-01
- UWB Coexistence and Cognitive Radio: How Multiband-OFDM Leads the Way
- The recent history of Ultrawideband communications technology has seen great debate over whether these UWB cause unacceptable interference to existing users of the same and nearby bands. Building on the IEEE 802.15.2 Recommended Practice and the framework developed by IEEE 802.19, researchers are developing techniques to separate UWB signals for...
- Tags: UWB, Radio, Alereon Inc., Ultrawideband (UWB), Wireless
- White papers 2004-09-15
- Ultrawideband: High-Speed, Short-Range Technology With Far-Reaching Effects
- This paper provides an overview of MB-OFDM technology as the de facto standard, as well as the status of MBOA standards development and regulatory issues. It also addresses potential markets and applications, explains the respective roles of various standards organizations and industry alignment within the UWB ecosystem, and reviews relative...
- Tags: UWB, Ultrawideband (UWB), Wireless
- White papers 2004-09-01
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