Performance evaluation of DS-CDMA multistage interference canceller in multi-cell environments

Futami, T.; Seki, Hiroyuki; Tanaka, Yoshizo

doi:10.1109/glocom.1998.775733

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…The minimum quality of service, Eb/N0, required for a user (i) in uplink direction [2], without using a multi-user detector MUD [3,5,9,12,14,17], for interferences cancellation IC [4,10,11,13], can be expressed as:…”

Section: Application Of Mud Receiver On Uplink Asynchronous Modementioning

confidence: 99%

Capacity Enhancement by Using a Multi-User Detector on Uplink Synchronous Mode

Alami¹,

Aknin²,

Erradi³

et al. 2016

IJITCS

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The Uplink Synchronous Transmission Scheme [1], is a technique used by operators, that exploit the uplink orthogonality, to reduce multiple access interferences in uplink direction and consequently to increase uplink capacity. The USTS gives better performances when we have an ideal case presented by no channelization code restrictions per scrambling code. In reality, channelization codes are limited. To resolve this problem, several scrambling codes are used to admit more users in the cell. However, the use of different scrambling codes increases the multiple access interference and consequently decreases uplink capacity gain, since signals transmitted by users under different scrambling codes are non-orthogonal. To obtain more performances and therefore to increase the uplink capacity gain, we will study the introduction of a multiuser detector for interferences cancellation, in uplink synchronous mode. For that, two values of interference cancellation efficiency  of the multi-user detector are considered. In this study, only the multiple access interference is reduced. To show the effect of other-cell interferences on uplink synchronous mode capacity, two scenarios are considered: an isolated cell and a multiple cell network.

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Section: Application Of Mud Receiver On Uplink Asynchronous Modementioning

confidence: 99%

Capacity Enhancement by Using a Multi-User Detector on Uplink Synchronous Mode

Alami¹,

Aknin²,

Erradi³

et al. 2016

IJITCS

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“…RIF is a multidimensional function of channel environment, F (intercell-to-intracell interference ratio) value, target quality, number of active users, and PIC parameters such as weighting factors, DPCCH/DPDCH power ratio, and so forth. The link-level simulator calculates the RIF as in (9). Realistic propagation channel conditions have been simulated using the COST 259 channel model [10], using the settings corresponding to a typical urban environment.…”

Section: Link-level Simulation Modelingmentioning

confidence: 99%

“…Several studies have been published on suboptimal and less complex receivers, for example, a class of linear receivers [2], successive cancellation schemes [3], and particularly on parallel IC (PIC) schemes [4,5,6,7,8,9]. However, these studies are mainly focused on link performance or using an ideal analytical system approach.…”

Section: Introductionmentioning

confidence: 99%

WCDMA Uplink Parallel Interference Cancellation—System Simulations and Prototype Field Trials

Hagerman

Gunnarsson

Murai³

et al. 2005

EURASIP J. Adv. Signal Process.

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Interference cancellation (IC) is one identified key technology to enhance WCDMA uplink performance. The goal of this contribution is to highlight the relative uplink system capacity improvement available for WCDMA, especially in realistic typical urban radio environments when employing receiver implementations including realistic channel estimation, searcher, and so forth. The performance of the selected limited-complexity parallel IC receiver is first evaluated with link-level simulations in order to provide input to system-level simulations. The system-level methodology is explained and a 40% system-level uplink capacity increase compared to utilizing the conventional RAKE receiver is found. The limited-complexity parallel IC receiver is then evaluated in a single-cell field trial. The trials show that both the mean and the variance of the outer-loop power control is reduced, which implies an overall increased capacity and an increased battery life of the terminals. Furthermore, the observed capacity gains are in accordance with system simulations.

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