uwb multiband
RSS uwb multibandSort by: Relevance | Date
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]
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]
Design of a Multiband OFDM System for Realistic UWB Channel Environments
White Paper There are many differences between real-world behavior of narrow-band and UWB systems. The large bandwidth of UWB waveforms, instead, significantly increases the ability of the RX to resolve the different reflections in the channel. [25 Jul 2007]
System Design Considerations for Ultra-Wideband Communication
White Paper The MultiBand OFDM Alliance (MBOA) proposal for 802.15.3a uses Orthogonal Frequency-Division Multiplexing (OFDM) modulation in a bandwidth of 528 MHz. This prototype modulates data with binary phase shift keyed pulses, communicates over a wireless... [18 Apr 2007]
Performance of Coherent Impulse Radio and Multiband-OFDM on IEEE UWB Channels
White Paper This paper presents the performance of single band impulse radio systems, TH-UWB and DS-UWB, multiband impulse radio systems, MB-UWB, and multiband OFDM systems on the IEEE 802.15 UWB channel models CM1ñCM4. [14 Apr 2007]
Multiband-OFDM MIMO Coding Framework for UWB Communication Systems
White Paper This paper proposes a general framework to analyze the performance of multiband UWB-MIMO systems regardless of specific coding schemes. A combination of Space-Time-Frequency (STF) coding and hopping multiband OFDM modulation is also proposed to... [13 Apr 2007]
Performance Analysis and Range Improvement in Multiband-OFDM UWB Communications
White Paper 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... [13 Apr 2007]
Precise Timing for Multiband OFDM in a UWB System
White Paper This paper addresses practical synchronization algorithms for multiband OFDM UWB transmission, and analyze the performance of a Maximum Likelihood (ML) joint timing/channel estimation algorithm. Precise positioning is one attractive application of... [13 Apr 2007]
Use of Cognitive Radio Techniques for OFDM Ultrawideband Coexistence With WiMax
White Paper 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. [13 Apr 2007]
On the Design of Robust Multiband OFDM Ultra-Wideband Receivers
White Paper 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... [13 Apr 2007]
Concatenated RS-Convolutional Codes for Ultrawideband Multiband-OFDM
White Paper This paper investigates the performance of concatenated Reed Solomon and convolutional (RSconvolutional) codes for UltraWideBand (UWB) MultiBand Orthogonal Frequency Division Multiplexing (MB-OFDM) systems. [11 Apr 2007]
Space-Frequency Transmit Diversity in Multiband-OFDM Systems
White Paper This paper investigates the suitability and performance of space-frequency block coded Multi-Band Orthogonal Frequency Division Multiplexing (MB-OFDM) system under UWB channel model. In the proposed MB-OFDM UWB system, the space coded symbols are... [11 Apr 2007]
Bluetooth Picks WiMedia UWB for High Speed
White Paper 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. [30 Jun 2006]
Performance Analysis and Enhancement of Multiband OFDM for UWB Communications
White Paper This paper analyzes the frequency-hopping Orthogonal Frequency-Division Multiplexing (OFDM) system known as Multiband OFDM, a strong contender for the physical layer IEEE standard for high-rate Wireless Personal Area Networks (WPANs) based on... [16 Jun 2006]
Ultrawideband: High-Speed, Short-Range Technology With Far-Reaching Effects
White Paper 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 comparisons with other technologies. [22 Mar 2005]
