نتایج جستجو برای: base station
تعداد نتایج: 295282 فیلتر نتایج به سال:
We consider the problem of distributed joint user association and beamforming in multi-cell multiple-input singleoutput systems. Assuming perfect local channel state information, each base station applies a distributed beamforming scheme called WSLNR-MAX [1] which depends on the user association in the network. We determine the user association by a proposed stable matching with externalities a...
This paper presented an estimation method of maximum effective isotropic radiated power (EIRP) and electro-magnetic field (EMF) strength of a wideband code-division multiple-access (WCDMA) base station based on over-the-air measurements of a pilot channel in a code domain. To verify the feasibility of the proposed method, we estimated the maximum EIRP and EMF strengths of the self-designed test...
Several diversity techniques employing multiple antennas in the base station have been developed for mobile communication systems. However, the performance of diversity methods strongly depends on the correlation between antenna elements. When multiple co-polarized antennas are used in base station, the practical factor limiting the number of diversity branches is the required antenna separatio...
Albeit the conception of relaying dates back to the 1970s, in recent years there has been an upsurge of search interest in cooperative wireless communications in both academia and industry. This article presents an easy-reading overview of the pivotal topics in both mobile station (MS) and base station (BS) assisted cooperation in the context of cellular radio systems. Owing to the ever-increas...
We consider the following model of cellular networks. Each base station has a given finite capacity, and each client has some demand and profit. A client can be covered by a specific subset of the base stations, and its profit is obtained only if its demand is provided in full. The goal is to assign clients to base stations, so that the overall profit is maximized subject to base station capaci...
The wireless industry is experiencing a great revolution in order to meet the expectations of the end users. In mobile multi-hop DTSP algorithm, the available bandwidth resources are increased by partitioning each time slot into several minislots wherein different numbers of minislots are allocated to different users. The mobile multi-hop DTSP algorithm is based on asynchronous time-division mu...
Two different relay modes are defined in IEEE 802.16j WIMAX standard: transparent mode and non-transparent mode. IEEE 802.16j standard supports mobile station mobility; it defines three kinds of hand over mechanism: hard handover, macro diversity handover (MDHO) and fast BS switching (FBSS) In this paper we have simulated the hard hand over mechanism of IEEE 802.16j transparent mode networks us...
Studying effects of mobile phone base station signals on health have been discouraged by authoritative bodies like WHO International EMF Project and COST 281. WHO recommended studies around base stations in 2003 but again stated in 2006 that studies on cancer in relation to base station exposure are of low priority. As a result only few investigations of effects of base station exposure on heal...
Power control in cellular systems is applied to numerous communication architectures. For Frequency Division Multiple Access (FDMA) and Time Division Multiple Access (TDMA) power control reduces intercell interference and improves capacity. For Code Division Multiple Access (CDMA) power control is a required part of the base station and mobile station designs. Power Control reduces interference...
-WiMAX (Worldwide Interoperability for Microwave Access) is an emerging technology that can provide wireless broadband access at the data rates of 70 Mbps over 50 kilometres to both home and business customers. WiMAX is cost effective and offers higher data rates than other wireless networks. It supports both fixed and mobile applications. WiMAX is easier to deploy as compared to other networks...
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