An evaluation of adaptive antennas for UMTS FDD by system simulations

Pettersen, M.; Bråten, Lars Erling; Spilling, A.G.

doi:10.1109/vetecf.2003.1285012

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…In literature, some performance comparisons of systems with different array topologies can be found [8,9,10,11,12], but either no real cellular system is considered or important aspects like downlink transmission, maximum ratio combining at the receivers, or specific array topologies are not taken into account. In order to obtain a clear comparison and work out the performance improvement by transmit beamforming, we study omnidirectional as well as 3-sector networks whereby the latter concept represents the today's standard antenna configuration.…”

Section: Introductionmentioning

confidence: 99%

System-Level Performance of Antenna Arrays in CDMA-Based Cellular Mobile Radio Systems

Czylwik

Dekorsy²

2004

EURASIP J. Adv. Signal Process.

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Smart antennas exploit the inherent spatial diversity of the mobile radio channel, provide an antenna gain, and also enable spatial interference suppression leading to reduced intracell as well as intercell interference. Especially, for the downlink of future CDMA-based mobile communications systems, transmit beamforming is seen as a well-promising smart antenna technique. The main objective of this paper is to study the performance of diverse antenna array topologies when applied for transmit beamforming in the downlink of CDMA-based networks. In this paper, we focus on uniform linear array (ULA) and uniform circular array (UCA) topologies. For the ULA, we consider three-sector base stations with one linear array per sector. While recent research on downlink beamforming is often restricted to one single cell, this study takes into account the important impact of intercell interference on the performance by evaluating complete networks. Especially, from the operator perspective, system capacity and system coverage are very essential parameters of a cellular system so that there is a clear necessity of intensive system level investigations. Apart from delivering assessments on the performance of the diverse antenna array topologies, in the paper also different antenna array parameters, such as element spacing and beamwidth of the sector antennas, are optimized. Although we focus on the network level, fast channel fluctuations are taken into account by including them analytically into the signal-to-interference calculation.

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Section: Introductionmentioning

confidence: 99%

System-Level Performance of Antenna Arrays in CDMA-Based Cellular Mobile Radio Systems

Czylwik

Dekorsy²

2004

EURASIP J. Adv. Signal Process.

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“…Other published works investigating the system performance of fixed multi-beam systems in WCDMA can be found in [3], [4], [5], [6]. In these studies, the evaluation was conducted by means of quasi-static system simulation and in most of these studies a simplified channel model was assumed.…”

Section: Introductionmentioning

confidence: 99%

System Performance of Fixed Beams with S-CPICH as a Phase Reference in WCDMA

Osseiran

Logothetis

Molteni³

2006 IEEE 63rd Vehicular Technology Conference

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A Fixed Beam (FB) system that uses a beam specific Secondary-Common PIlot CHannel (S-CPICH) as a phase reference for channel estimation and demodulation in WCDMA is evaluated in a dynamic radio network simulator. The impact of the angular spread on the DownLink (DL) system performance is analyzed. Furthermore, various scrambling code allocation strategies and an adaptive load-dependent power tuning algorithm of the common channels are proposed and evaluated. Extensive simulation results have verified that increasing the number of FB from 1 to 2 or 4 beams per sector in a typical urban radio channel yields significant DL capacity gains.

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An evaluation of adaptive antennas for a UMTS FDD network deployed in a suburban area of Norway

Bråten

Pettersen

Spilling

14th IEEE Proceedings on Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003.

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An evaluation of adaptive antennas for UMTS FDD by system simulations

Cited by 4 publications

References 4 publications

System-Level Performance of Antenna Arrays in CDMA-Based Cellular Mobile Radio Systems

System-Level Performance of Antenna Arrays in CDMA-Based Cellular Mobile Radio Systems

System Performance of Fixed Beams with S-CPICH as a Phase Reference in WCDMA

An evaluation of adaptive antennas for a UMTS FDD network deployed in a suburban area of Norway

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