Browse Conferences
Presence and event notification in UMTS IP multimedia subsystem
Presence service is defined as a service of the IP multimedia subsystem (IMS) in the current UMTS specification. It is responsible for distribution of presence information not only of a user, but also of a service, supporting notifications ...
UE receive diversity as a performance enhancement to 3GPP Rel99, Rel5 and Rel6 radio features
This paper discusses the radio performance improvements that handsets with two-antenna receive diversity can bring about to 3GPP Rel99, Rel5 and Rel6 WCDMA systems. The scope of this study is to offer a comprehensive picture of the UE recei...
Smart cell planning and optimisation for UMTS
In this paper we introduce an automatic cell planning and optimisation tool called CDSSmartPlan. This is one of a very limited number of automatic cell planning tools which has the capability to plan for UMTS. CDSSmartPlan is powered by a m...
Enabling UMTS end-to-end performance analysis
Because of its inherent complexity, the Universal Mobile Telecommunication System (UMTS) network deployment demands a significant amount of system simulations and modelling activities to ensure optimum network performance and integrity. The...
Joint pilot and data loading technique for MIMO systems operating with covariance feedback
We consider a multiple input multiple output (MIMO) system wherein channel correlation as well as noisy channel estimation are both taken into account. For a given block fading duration, pilot-assisted channel estimation is carried out with...
Integration of MIMO antenna arrays into hand-helds
This paper is concerned with the integration of compact antenna arrays for MIMO into handheld devices, where the antenna properties are influenced by the housing of the device and the user's head and hand. An accurate model that allows for ...
Packet throughout of adaptive space-time modulation
Pilot-symbol aided channel estimation by Wiener filtering for OFDM systems with multiple transmit antennas
We address pilot-symbol aided channel estimation (PACE) for OFDM based systems employing multiple transmit antennas. Two approaches are investigated: first, all N/sub T/ transmit antennas use all available pilot symbols simultaneously, resu...
Investigation of hybrid MIMO techniques
The paper compares and investigates the performance of wireless local area network systems using multiple input multiple output (MIMO) techniques. In particular, two different algorithms, V-BLAST and space-time block coding (STBC), are desc...
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