Performance Analysis and Enhancement of Multiband OFDM for UWB Communications

In this paper, we analyze the frequency-hopping orthogonal frequency-division multiplexing (OFDM) system known as Multiband OFDM for high-rate wireless personal area networks (WPANs) based on ultra-wideband (UWB) transmission. Besides considering the standard, we also propose and study system perfor...

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Veröffentlicht in:IEEE transactions on wireless communications Jg. 6; H. 6; S. 2182 - 2192
Hauptverfasser: Snow, C., Lampe, L., Schober, R.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Piscataway, NJ IEEE 01.06.2007
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Algorithms
Applied sciences
Business and industry local networks
Channels
Code standards
Equipments and installations
Exact sciences and technology
Frequency division multiplexing
Frequency measurement
Measurement standards
Mobile radiocommunication systems
Networks and services in france and abroad
Noise levels
OFDM
Orthogonal Frequency Division Multiplexing
Performance analysis
Performance enhancement
Power efficiency
Radiocommunications
Studies
System performance
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Teleprocessing networks. Isdn
Transmission and modulation (techniques and equipments)
Ultra wideband communication
Ultra wideband technology
Wireless communication
Wireless personal area networks
Performance evaluation
Wireless LAN
Parameter estimation
Ultra wideband
Wireless telecommunication
Information rate
information-theoretic measures
bit loading
Information measure
diversity
Frequency selection
Channel estimation
Mobile radiocommunication
Wide band transmission
Frequency domain method
Turbo code
Algorithm
Information transmission
Frequency hop communication
Ultra wide band
Simulation
Orthogonal frequency division multiplexing
Multiband OFDM
Personal communication networks
Information theory
ISSN:1536-1276, 1558-2248
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Beschreibung
Zusammenfassung:In this paper, we analyze the frequency-hopping orthogonal frequency-division multiplexing (OFDM) system known as Multiband OFDM for high-rate wireless personal area networks (WPANs) based on ultra-wideband (UWB) transmission. Besides considering the standard, we also propose and study system performance enhancements through the application of Turbo and Repeat-Accumulate (RA) codes, as well as OFDM bit-loading. Our methodology consists of (a) a study of the channel model developed under IEEE 802.15 for UWB from a frequency-domain perspective suited for OFDM transmission, (b) development and quantification of appropriate information-theoretic performance measures, (c) comparison of these measures with simulation results for the Multiband OFDM standard proposal as well as our proposed extensions, and (d) the consideration of the influence of practical, imperfect channel estimation on the performance. We find that the current Multiband OFDM standard sufficiently exploits the frequency selectivity of the UWB channel, and that the system performs in the vicinity of the channel cutoff rate. Turbo codes and a reduced-complexity clustered bit-loading algorithm improve the system power efficiency by over 6 dB at a data rate of 480 Mbps.
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ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2007.05770