Adaptive beamforming in CDPD mobile end systems

TitleAdaptive beamforming in CDPD mobile end systems
Publication TypeConference Paper
Year of Publication1999
AuthorsSalkintzis, A. K., and P. T. Mathiopoulos
Conference NameElectronics, Circuits and Systems, 1999. Proceedings of ICECS '99. The 6th IEEE International Conference on
Pagination679 -682 vol.2
Date Publishedsep.
Keywordsadaptive beamforming, adaptive calculation, antenna diversity, array signal processing, beamformer complex weights, CDPD mobile end systems, cellular digital packet data system, cellular radio, digital radio, diversity reception, forward channel performance improvement, GMSK signal, maximal-ratio digital beamformer, minimum shift keying, mobile Internet access, packet radio networks, reference temporal signal, synchronisation, telecommunication channels, vector channel model

This paper addresses the application of antenna diversity in the Cellular Digital Packet Data (CDPD) Mobile End Systems (M-ESs) as a means to improve the performance of the CDPD forward channel and meet the tight requirements for mobile Internet access. The focal point is the construction of a maximal-ratio digital beamformer, which effectively exploits a periodic signal, transmitted in every CDPD cell. This signal serves as a reference temporal signal and it is used in the adaptive calculation of the complex weights of the beamformer. The paper presents the design and the operation of the adaptive beamformer, it demonstrates its performance through simulation results and additionally it discusses its significance and its applications. It is argued that even for relatively small spacing between the antenna elements the considered beamforming scheme has the potential to provide significant improvements in the performance of the CDPD forward channel


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