Downlink capacity comparison between different smart antenna concepts in a mixed service W-CDMA system

Osseiran, Afif; Ericson, M.; Barta, János; Göransson, Bo; Hagerman, Bo

doi:10.1109/vtc.2001.956453

Cited by 15 publications

(14 citation statements)

References 10 publications

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“…There are basically two types of smart antennas systems: fully adaptive and multiple fixed beams. Many studies have shown that multiple switched fixed beams offer increased capacity and are less complex compared to the fully adaptive smart antenna [11]. The aim of the multiple fixed-beam system is to increase the gain in the direction of the desired user and to reduce gain in the direction of other users (interferers).…”

Section: Smart Antennasmentioning

confidence: 99%

A multiple switched beam Smart antenna with beam shaping for dynamic optimisation of capacity & coverage in mobile telecommunication networks

Bobor-Oyibo

Foti²,

Smith

2008

2008 8th International Symposium on Antennas, Propagation and EM Theory

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Citation: Bobor-Oyibo, Freeborn, Foti, Steve and Smith, Dave (2008) A multiple switched beam smart antenna with beam shaping for dynamic optimisation of capacity and coverage in mobile telecommunication networks. In: Proceedings of the 8th International Symposium on Antennas, Propagation and EM Theory, 2008 (ISAPE 2008 Northumbria University has developed Northumbria Research Link (NRL) to enable users to access the University's research output. Copyright © and moral rights for items on NRL are retained by the individual author(s) and/or other copyright owners. Single copies of full items can be reproduced, displayed or performed, and given to third parties in any format or medium for personal research or study, educational, or not-for-profit purposes without prior permission or charge, provided the authors, title and full bibliographic details are given, as well as a hyperlink and/or URL to the original metadata page. The content must not be changed in any way. Full items must not be sold commercially in any format or medium without formal permission of the copyright holder. The full policy is available online: http://nrl.northumbria.ac.uk/policies.html This document may differ from the final, published version of the research and has been made available online in accordance with publisher policies. To read and/or cite from the published version of the research, please visit the publisher's website (a subscription may be required.) A Multiple Switched Beam Smart Antenna with

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Section: Smart Antennasmentioning

confidence: 99%

A multiple switched beam Smart antenna with beam shaping for dynamic optimisation of capacity & coverage in mobile telecommunication networks

Bobor-Oyibo

Foti²,

Smith

2008

2008 8th International Symposium on Antennas, Propagation and EM Theory

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“…Important system parameters are summarized in Table 2. Note that the simulation tool is similar to the one used in [9]. The deployment model of the simulator is a homogeneous hexagon cell pattern with wrap-around to eliminate border effects.…”

Section: System Setupmentioning

confidence: 99%

“…Such strategies have been shown in GSM and TDMA systems to yield an improved performance, in terms of increased system capacity and/or increased coverage [4]. In [9], results show that the performance gain obtained by an advanced antenna system could be substantial compared to an ordinary three sectors system. Broadly speaking, adaptive antenna systems are grouped into two categories:…”

Section: Introductionmentioning

confidence: 96%

System Performance of Transmit Diversity Methods and a Two Fixed-Beam System in WCDMA

Osseiran

Logothetis

2004

Wireless Pers Commun

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Downlink transmit diversity modes for WCDMA together with a two fixed-beam antenna array system are compared relative to the single antenna sectorized system in a radio network simulator. The transmit diversity methods investigated are: space-time transmit diversity and closed-loop mode I transmit diversity. Frequency selective (COST 259) and flat fading channels are considered and their impact to speech-only and data-only services is evaluated. A third service, which highlights the system performance of the various advanced antennas, is also investigated.The results in this investigation point out that the diversity gain in flat fading channels is substantial. In frequencyselective fading, the benefits of fixed beam systems is encouraging, whereas transmit diversity methods (especially Space-Time Transmit Diversity) is unsatisfactory.

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“…However, fixed beam solutions were shown to give comparable gains in WCDMA to those using the more complex adaptive array solutions under certain circumstances. For example, in [20] it was shown that the fixed beam and adaptive array solutions on the DL yields almost exact capacity in interference limited system, and in a power limited system, the gain of the steered beam concept will prevail up to the order of 25%. Also, the work in [12] has shown the capacity gains with smart antenna base stations using adaptive antennae is very large, however, it has also shown that the difference between adaptive steerable antennae and the fixed beams antennae are minor in certain user scenarios.…”

Section: Introductionmentioning

confidence: 99%

Uplink Capacity/Coverage Analysis of WCDMA with Switched Beam Smart Antennae

Aldmour

Al‐Begain

Zreikat

2007

Wireless Pers Commun

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Capacity and coverage represent, in addition to QoS, the three main requirements for W-CDMA based 3G mobile communication systems. These are conflicting requirements; i.e., optimizing one will be on the account of the other two. All three, however, depend largely on the interference levels in the system. Improvements on interference are thought to have a decisive effect on the performance of the 3G system and one important interference reduction technique is the utilization of smart antennae. In this paper, we analyze capacity/coverage on the uplink in W-CDMA system utilizing switched beam smart antennae, SBSA, using a simple model of the antenna, while satisfying a certain minimum level of QoS. Limits imposed by both interference from others and the limited uplink power available to any user in the cell are considered. Results of this paper are analytical formulae for capacity/coverage that take into consideration many of the important parameters of either the antennae or the WCDMA system. A sectional view of improvement gains, if any, of either capacity or coverage upon antenna upgrading/downgrading is provided. It is shown that improvements by the directional SBSA of either capacity or coverage, are only attained at high interference conditions; i.e., higher number of users when considering coverage improvement or smaller coverage areas when considering capacity. The higher the interference conditions are the higher gain over side lobes or more beams SBSA are needed to attain improvement.

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Downlink capacity comparison between different smart antenna concepts in a mixed service W-CDMA system

Cited by 15 publications

References 10 publications

A multiple switched beam Smart antenna with beam shaping for dynamic optimisation of capacity & coverage in mobile telecommunication networks

A multiple switched beam Smart antenna with beam shaping for dynamic optimisation of capacity & coverage in mobile telecommunication networks

System Performance of Transmit Diversity Methods and a Two Fixed-Beam System in WCDMA

Uplink Capacity/Coverage Analysis of WCDMA with Switched Beam Smart Antennae

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Downlink capacity comparison between different smart antenna concepts in a mixed service W-CDMA system

Cited by 15 publications

References 10 publications

A multiple switched beam Smart antenna with beam shaping for dynamic optimisation of capacity &#x00026; coverage in mobile telecommunication networks

A multiple switched beam Smart antenna with beam shaping for dynamic optimisation of capacity &#x00026; coverage in mobile telecommunication networks

System Performance of Transmit Diversity Methods and a Two Fixed-Beam System in WCDMA

Uplink Capacity/Coverage Analysis of WCDMA with Switched Beam Smart Antennae

Contact Info

Product

Resources

About

A multiple switched beam Smart antenna with beam shaping for dynamic optimisation of capacity & coverage in mobile telecommunication networks

A multiple switched beam Smart antenna with beam shaping for dynamic optimisation of capacity & coverage in mobile telecommunication networks