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Adptive radio access methods in multiuser systems - Diego Piazza

DATA DI RILASCIO 17/07/2012
DIMENSIONE DEL FILE 9,14
ISBN 9788866186755
LINGUAGGIO ITALIANO
AUTRICE/AUTORE Diego Piazza
FORMATO: PDF EPUB MOBI
PREZZO: GRATUITA

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...orthogonal frequency division multiple access (OFDMA) has emerged as a promising transmission technology for next generation wireless systems ... Adptive Radio Access Methods In Multiuser Systems - Piazza ... ... . In a multiuser scenario, adaptive radio resource allocation can significantly improve the performance of OFDMA systems. In this In multiuser impulse radio systems, the conventional detection methods always suffer from high complexity and poor robustness caused by dense multipath and long maximum excess delay of the nonline-of-sight (NLOS) channel. To detect the direct spread (DS) impulse signal, an adaptive pre-interpolation filter algorithm is introduced. By analysis and simulation, ... Libro Adptive radio access methods in multiuser ... ... . To detect the direct spread (DS) impulse signal, an adaptive pre-interpolation filter algorithm is introduced. By analysis and simulation, this adaptive interpolator applied ... Code division multiple access (CDMA) is a channel access method adopted by various radio technologies worldwide. In particular, CDMA is used as an access method in many mobile standards such as CDMA2000 and WCDMA. We address the problem of blind multiuser equalization in the wideband CDMA systems in the noisy multipath propagation environment. Adaptive Interference Suppression in Multiuser Wireless OFDM Systems Using Antenna Arrays Samir Kapoor, Member, IEEE, Daniel J. Marchok, and Yih-Fang Huang,Fellow, IEEE Abstract— This paper considers the problem of mitigating fading and interference in wireless orthogonal frequency division multiplexing (OFDM) multiple access communication ... US20050207477A1 US11/082,621 US8262105A US2005207477A1 US 20050207477 A1 US20050207477 A1 US 20050207477A1 US 8262105 A US8262105 A US 8262105A US 2005207477 A1 US2005207477 A1 US This paper considers the problem of mitigating fading and interference in wireless orthogonal frequency division multiplexing (OFDM) multiple access commun Adaptive interference suppression in multiuser wireless OFDM systems using antenna arrays - IEEE Journals & Magazine In this paper, we propose an efficient channel and power assignment algorithm in mixed FSO/RF multiuser system for UAV application with proportional fairness. The method can satisfy different data rate requirements among users with efficient resource utilization. In this algorithm, channel assignment and power allocation are operated separately. In this paper, we analyze the effects of these radio impairments in a multiuser SC-FDMA uplink system and present digital-signal-processing-based methods for the joint estimation and equalization of impairments and channel distortions on the receiver side with an arbitrary number of receiver antennas. CROSS-REFERENCE TO RELATED APPLICATION. This application claims priority under 35 U.S.C. 119(e) of U.S. Provisional Application Ser. No. 60/553,779 filed on Mar. 16, 2004, the dis A receiver includes multi-user detection (MUD) functionality and a cognitive engine. The receiver may also be coupled to multiple antennas and have analog beamforming capability. The cognitive engine is operative for selecting a beam or beams associated with the multiple antennas to enable successful demodulation by the MUD. The receiver has application in multiple access channels and in other ... The spectrum efficiency is denoted as the average number of bits transmitted by a subcarrier, and the outage probability indicates the number of the OFDM symbols terminated due to insufficient data rate versus the total numbers of OFDM symbols simulated by the No. 4 LU Yan-hui, et al.: Adaptive radio resource allocation for multiple traffic OFDMA broadband wireless access system 5 method. A method processes information to be sent via radio, according to which first bits represent a first number of N-tuples and second bits represent a second number of N-tuples. The first bits are to be sent using a first group of sub-bands of a frequency band, and the second bits are to be sent using a second group of sub-bands of the frequency band. A comparison of adaptive equalization methods for multiuser detection in OFDM-SS systems. Access Full Text. A comparison of adaptive equalization methods for multiuser detection in OFDM-SS systems. Author(s): R. Liu; ... Ninth International Conference on HF Radio Systems and Techniques — Recommend this title to your library....