FRAMES multiple access for UMTS and IMT-2000

Nikula, E.; Toskala, Antti; Dahlman, Erik; Girard, Laurent; Klein, Axel

doi:10.1109/98.667941

Cited by 74 publications

(21 citation statements)

References 5 publications

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“…Within ACTS the Future Radio Wideband Multiple Access System (FRAMES) project investigated hybrid multiple access technologies in order to select the best combination as a basis for further detailed development of UMTS radio access system. Based on this evaluation, a harmonized multiple access platform, FRAMES Multiple Access (FMA), was designed consisting of two modes: FMA1, a wideband TDMA scheme with and without spreading, and FMA2, a W-CDMA scheme [4]. FMAl without spreading has roots in the ATDMA scheme and its subsequent developments [5].…”

Section: Research and Standards Activitiesmentioning

confidence: 99%

“…The 200 kHz HSD carrier has the same parameters as the enhanced GSM carrier (Enhanced Data Rates for GSM Evolution -EDGE), currently a work item in the GSM phase 2+ standardization [9]. Wideband TDMA is based on FRAMES FMAl without spreading [4].…”

Section: Research and Standards Activitiesmentioning

confidence: 99%

“…The use of short codes to ease the implementation of MUD would be more beneficial in the downlink since the cyclostationarity of the signal could be utilized for adaptive implementation of the receiver. Orthogonality between the different spreading factors can be achieved by tree-structured orthogonal codes [4].…”

Section: W-cdmamentioning

confidence: 99%

See 2 more Smart Citations

An overview of air interface multiple access for IMT-2000/UMTS

1998

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The basis for any air interface design is h o w the common trans-ABSTRACT mission ' . m e d i u m is shared between users (i.e., multiple access scheme). The underlying multiple access method for all mobile radio systems is FDMA. The performance of TDMA and CDMA has been subject to vigorous debate i n recent years, w i t h o u t any definitive conclusions. This article gives an overview of worldwide research and standardization activities related t o the multiple access schemes for third-generation

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Section: Research and Standards Activitiesmentioning

confidence: 99%

Section: Research and Standards Activitiesmentioning

confidence: 99%

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An overview of air interface multiple access for IMT-2000/UMTS

1998

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“…Otherwise, slots larger than a certain minimum duration may be defined to support higher bandwidth traffic. For example, in the Future Radio Wideband Multiple Access System (FRAMES) [2] multiple access proposal for Universal Mobile Telecommunications System (UMTS), the GSM evolution for 3Gwireless systems, three kinds of multi-slot structure are defined. These are 1 8th, 1 16 th rate slots, and 1 64 th rate slots.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Adaptive QoS Handoff Mechanism Using Service Degradation and Compensation

Lee¹,

Kim²

2013

IJSEIA

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User mobility management is one of the important components of mobile multimedia environments. That is, mobile users should obtain network resources after handoff for seamless service supports. So, an adaptive handoff scheme has been proposed to minimize the connection dropping probability for handoff connections. This paper shows the comparative performance analysis for the adaptive QoS handoff mechanism with existing solutions such as non-priority scheme (NPS) and guard-channel scheme (GCS). It has been shown from the performance evaluations that the adaptive QoS mechanism provides lower dropping and blocking probability than existing schemes.

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“…Code division multiple access (CDMA) has emerged as a popular format for wireless communication systems [7].…”

Section: Introductionmentioning

confidence: 99%

Blind equalization of CDMA systems with nonlinear channels

Redfern

Zhou²

Conference Record of the Thirty-Third Asilomar Conference on Signals, Systems, and Computers (Cat. No.CH37020)

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Code division multiple access (CDMA) has emerged as a popular format for many multiuser communication systems. However; the error pe~ormance of CDMA systems deteriorates as a result of intersymbol interJerence and nonlinearities. In this paper we propose a blind equalizer for chip synchronous CDMA systems with Volterra (nonlinear) channels. The equalizer requires multiple observations at the receive< obtained through oversampling or multiple antennas, and a knowledge of the code for the desired user. Zero forcing equalization is possible in the noisefree case. Simulations demonstrate the pegonnance of the equalizer on a number of different channel and user conjigurations.

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FRAMES multiple access for UMTS and IMT-2000

Cited by 74 publications

References 5 publications

An overview of air interface multiple access for IMT-2000/UMTS

An overview of air interface multiple access for IMT-2000/UMTS

Performance Analysis of Adaptive QoS Handoff Mechanism Using Service Degradation and Compensation

Blind equalization of CDMA systems with nonlinear channels

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