Indoor DS-CDMA system deployment and performance with successive interference cancellation

Pais, A.V.; Sowerby, K.W.; Neve, M.J.

doi:10.1049/el:20045796

Cited by 2 publications

(3 citation statements)

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“…1a shows the building floor plana hollow concrete services shaft contains the elevators and stair wells, and the remaining space is divided into offices with dry-wall partitions. Multiple transmitter locations (hereafter referred to as base stations) throughout the building are considered and the received power averaged over (3λ) 3 sectors to estimate the local mean by removing the effects of small-scale fading [8]. Mobile users operating in the building are assumed to connect to the base station on their current floor, and signals arriving from other co-channel base stations are treated as interference.…”

Section: Fdtd Channel Modelmentioning

confidence: 99%

“…Fig. 1a shows a density map of the DS-CDMA outage probability computed from the FDTD simulation results using (2) for a vertically staggered base-station configuration: the desired base station is located at ▪ on floor 2, whereas the interfering base stations are located at × on the floors immediately adjacent (1) and (3). This represents the limiting/worst-possible case as it is assumed frequencies are reused on each floor.…”

Section: Fdtd Channel Modelmentioning

confidence: 99%

“…Currently, empirical models based on experimental measurements are widely used, e.g. [2,3]. However, many of the parameters in these models lack an electromagnetic basis and can vary considerably between buildings, and thus often require further tuning measurements (which can be time-consuming and expensive) [2].…”

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confidence: 99%

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Performance estimation for indoor wireless systems using FDTD method

Austin

2015

Electron. lett.

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A three-dimensional implementation of the finite-difference timedomain method is used to estimate the down-link outage probability of a direct-sequence code division multiple access system operating in a multi-storey office building in the presence of co-channel interference. The numerical analysis is supported by experimental measurements and good agreement is found for the outage probability. Both simulation and measured results indicate that vertically aligned cochannel base stations have lower outage than a vertically staggered configuration, which is explained by examining the correlation between the desired and interfering signals.Introduction: Achieving reliable performance within highly confined areas, such as multi-storey buildings, remains a challenge for contemporary wireless systems. Co-channel interference from neighbouring systems is significant, as transmit powers are relatively high, frequency reuse separations are generally shorter, and unlike outdoor deployments, three-dimensional (3D) reuse strategies are possible [1]. Furthermore, predicting the system performance for indoor environments is complicated by the large variability in building layout, architectural styles, and building materials. Currently, empirical models based on experimental measurements are widely used, e.g. [2,3]. However, many of the parameters in these models lack an electromagnetic basis and can vary considerably between buildings, and thus often require further tuning measurements (which can be time-consuming and expensive) [2]. To investigate the factors limiting system performance, a 3D model of a multi-storey office building is analysed using the finitedifference time-domain (FDTD) method. The FDTD method has been shown to accurately model radiowave propagation within and around buildings, e.g. [4][5][6][7]. However, the previous research has largely focused on characterising propagation mechanisms, and not on the system performance. This Letter focuses on how the FDTD method can be applied to directly estimate the outage probabilities of a directsequence code division multiple access (DS-CDMA) system in the presence of co-channel interference.

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Section: Fdtd Channel Modelmentioning

confidence: 99%

Section: Fdtd Channel Modelmentioning

confidence: 99%