Wideband CDMA system for personal radio communications

Fukasawa, Atsushi; Sato, Takuro; Takizawa, Yumi; Katô, Toshio; Kawabe, N.; Fisher, R.E.

doi:10.1109/35.544333

Cited by 42 publications

(7 citation statements)

References 8 publications

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“…Various multiple access techniques can be considered to establish reliable communications over HFC networks. There has recently been an increasing interest in using multi-carrier spread-spectrum (MC-SS) techniques for high data rate applications [2][3][4]. An example of a MC-SS technique is the combination of orthogonal frequency division multiplexing (OFDM) and code division multiple access (CDMA).…”

Section: Introductionmentioning

confidence: 99%

Some TDMA and OFDM/CDMA receiver structures for communication over the return path of the CATV network

Bladel

Steendam

Marongiu

et al. 1998

ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated With SUPERCOMM'98 (Cat. No.98CH362

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This paper deals with the derivation and comparison of some promising TDMA and OFDM/CDMA receiver structures for communication over the return path channel of the cable TV (CATV) network. Regarding TDMA, it is shown that the performance substantially improves by using equalization. Given the slowly varying, frequency selective nature of the ingress noise, OFDM seems an interesting possible access technique to employ. Here it is considered in combination with CDMA. With respect to the performance in terms of SNR at the input of the decision device, the TDMA structure gives better results than the OFDM/CDMA schemes. Also with respect to design complexity TDMA seems more interesting.

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Section: Introductionmentioning

confidence: 99%

Some TDMA and OFDM/CDMA receiver structures for communication over the return path of the CATV network

Bladel

Steendam

Marongiu

et al. 1998

ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated With SUPERCOMM'98 (Cat. No.98CH362

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“…The support of these bandwidth requirements at adequate capacity levels is coupled with the efficient utilization of the air-interface.The direct sequence}code division multiple access (DS-CDMA) technology [13,14] has always been considered as an attractive alternative for basing the air-interface of third generation cellular systems. In this respect, and in order to meet the requirements dictated by IMT-2000-compliant systems, a new wireless access technology, namely wideband DS-CDMA (W-CDMA), has been developed during the recent past years [15][16][17][18][19][20][21]. Moreover, in the beginning of 1998, the special mobile group (SMG) of ETSI decided that W-CDMA would be a key component of the UMTS air-interface, which is called UMTS terrestrial radio access (UTRA).…”

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confidence: 99%

Power allocation in the context of dimensioning the air‐interface of third generation W‐CDMA‐based cellular systems

Demestichas¹,

Kotsakis²,

Tzifa³

et al. 2002

Int J Communication

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SUMMARYThe adoption of W-CDMA as an essential component of the air-interface of third-generation cellular systems brings to the foreground the need for new planning methodologies and software tools. In this perspective, this paper addresses planning problems that are important to the dimensioning of W-CDMAbased cellular networks. The problems aim at finding the optimal feasible allocation of transmission power to the sets of uplink and downlink connections that should be supported by the system, so as to cope with a corresponding traffic load scenario. The problems are concisely defined, mathematically formulated and solved by means of two computationally efficient, novel algorithms. The solutions of the problems may be seen as operating points at which the system performance should be driven. Finally, numerical results are presented and concluding remarks are drawn.

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“…An alternative approach is nonlinear (multistage) multiuser detection that would include channel estimation parameters too. This would be based on interference estimation and cancellation schemes (OKI standard-IS-665/ITU recommendation M.1073 or UMTS proposal recently defined by ETSI) [41], [42].…”

Section: Interference Canceller Modeling: Nonlinear Multiuser Detementioning

confidence: 99%

Wideband CDMA network sensitivity function

Glisic

Pirinen²

1999

IEEE J. Select. Areas Commun.

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Abstract-In this paper, we analyze capacity losses in code division multiple access (CDMA) networks due to imperfections in the operation of the system components. The main result of this work is a systematic mathematical framework for capacity evaluation of CDMA-based networks in fading channels. This should be considered as an alternative tool to extensive simulations being used for these purposes at the moment. The intention is to provide simple approximate relations that simultaneously take into account: multiple access intracell interference (MAI), intercell interference, and near-far effect, including different sources of power control imperfections. In addition to this, the efficiencies of the major receiver components are also included in the analysis. A flexible complex signal format is used which enables us to model all currently interesting proposals for wideband CDMA (W-CDMA) standards. The theory is general, and some examples of practical set of channel and system parameters are used as illustration. Further elaboration of these results, including extensive numerical analysis based on the offered analytical framework, would provide enough background for the understanding of W-CDMA system performance in a realistic environment.

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Wideband CDMA system for personal radio communications

Cited by 42 publications

References 8 publications

Some TDMA and OFDM/CDMA receiver structures for communication over the return path of the CATV network

Some TDMA and OFDM/CDMA receiver structures for communication over the return path of the CATV network

Power allocation in the context of dimensioning the air‐interface of third generation W‐CDMA‐based cellular systems

Wideband CDMA network sensitivity function

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