uwb
RSS uwbCoexistence Issues in Cognitive Radios Based on Ultra-Wide Bandwidth Systems
White Paper This paper discusses the basic concepts underlying Cognitive Radio (CR) and investigates the Ultra Wide Bandwidth (UWB) technology as one of the enabling transmission techniques for the implementation of CR systems. [11 Jul 2008]
Convergence Analysis of Iteratively Detected Time Hopping and DS-CDMA Ultrawide Bandwidth Systems by EXIT Charts
White Paper 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. [11 Jul 2008]
Ultra Wide Bandwidth Communications Towards Cognitive Radio
White Paper After the definition of a possible scenario, the paper discusses Ultra Wide Bandwidth (UWB) technology as one of the transmission techniques suitable for implementing a Cognitive Radio system. The paper then reviews some recent results concerning... [11 Jul 2008]
A "Range-Bandwidth Per Joule" Comparison for UWB and OTDM Waveforms
White Paper In that paper a comparison between UWB and DSSS technologies was done in terms of a Low Probability of Intercept and Detection (LPI/D) Figure of Merit, and complexity. This technical paper introduces OTDM and compares with both, UWB and DSSS, using... [10 Jul 2008]
On the Relation Between Bandwidth and Robustness of Indoor UWB Communication
White Paper The paper focuses on the effect of small-scale fading on the throughput of communication systems that operate with different bandwidth within an indoor environment. The small-scale fading of the indoor radio channel has been measured within an... [10 Jul 2008]
On the Relation Between Bandwidth and Robustness of UWB Channel in Complex Confined Areas
White Paper 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. [08 Jul 2008]
UWB Coexistence and Cognitive Radio: How Multiband-OFDM Leads the Way
White Paper 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... [11 Apr 2008]
Power Allocation for Multi-Band OFDM UWB Communication Networks
White Paper Ultra wideband (UWB) technology has shown significant advantages over other existing ones for short- or medium-range high speed communications. This paper proposes an efficient low-complexity power allocation technique for clustered multi-band OFDM... [10 Apr 2008]
DS-CDMA: The Technology of Choice for UWB
White Paper This white paper provides a background on UWB and compares the performance of DS-CDMA based UWB and multiband-OFDM based UWB. DS-CDMA offers the highest aggregate Mbps/m2 data rates because its CDMA codes are designed from the ground up to support... [10 Apr 2008]
Practical Approaches to Channel Estimation and Interference Suppression for OFDM Based UWB Communications
White Paper Ultra-wideband (UWB) communication is a potential technique for future high-speed networks. This paper investigates low complexity signal detection approaches for OFDM based UWB systems. Computer simulation results show that these techniques can be... [10 Apr 2008]
Ultra High-Speed and Ultra Low-Noise InP HEMTs
White Paper It then describes two sensors that have been developed using InP HEMTs: a 94-GHz-band passive image sensor and an Ultra-WideBand (UWB) radar operating in the quasi-millimeter waveband of 23 to 29 GHz. [14 Feb 2008]
Joint Scale-Lag Diversity in Mobile Ultra-Wideband Systems
White Paper This paper considers the effect of mobility on an Ultra-WideBand (UWB) direct sequence spread spectrum communication system. Based on a uniform ring of scatterers model, the paper determines that the wideband scattering function has a "Bathtub... [03 Sep 2007]
Scale-Lag Diversity Reception in Mobile Wideband Channels
White Paper Such analysis applies, for example, to Ultra-Wideband (UWB) radio frequency channels and underwater wideband acoustic channels. This paper considers the effect of mobility on a wideband Direct Sequence Spread Spectrum (DSSS) communication system... [31 Aug 2007]
Adaptation of Multiple Access Parameters in Time Hopping UWB Cluster Based Wireless Sensor Networks
White Paper UltraWideBand (UWB) is an attractive physical layer technology for wireless sensor networks due to its unique characteristics. Flexibility in adjusting the processing gain of UWB systems makes it possible to tune the data rate and transmission... [23 Aug 2007]
Ofcom ushers in licence-free UWB
News Ultrawideband (UWB) enables devices, such as PCs and DVD players, to communicate without wires at high speed and low cost over short distances, promising the eventual elimination of cabled interconnection for high-definition video and other... [13 Aug 2007]
