Stefan Brueck

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Coordinated multipoint or cooperative MIMO is one of the promising concepts to improve cell edge user data rate and spectral efficiency beyond what is possible with MIMOOFDM in the first versions of LTE or WiMAX. Interference can be exploited or mitigated by cooperation between sectors or different sites. Significant gains can be shown for both the uplink(More)
Coordinated multi-point transmission/reception is considered for LTE-Advanced as a tool to improve the coverage of high data rates, the cell-edge throughput and/or to increase the system throughput [1]. Joint transmission schemes are mentioned in [1] as an example of coordinated transmission between cells for the downlink. Here, data are transmitted(More)
Coordinated Multipoint (CoMP) transmission technique is one method to improve performance of cellular wireless systems, e.g. LTE Advanced, by cooperation of cells for reducing interference and increasing SINR of users in weak radio conditions, e.g. located at cell edge. In this paper, we present an adaptive clustering algorithm to dynamically adjust the(More)
Coordinated Multipoint (CoMP) techniques and heterogeneous wireless networks are two enablers to achieve improvements in data rate both for average as well as cell-edge users. We present a general CoMP technique based on coordinated beam selection and apply this technique in a heterogeneous wireless network where a hexagonal layout of macro base stations is(More)
The main objective of this paper is to investigate asynchronous linear multiuser detection (MUD) in mixed service UMTS networks in terms of system capacity as well as power reduction at mobile stations. This especially requires us to theoretically describe the interaction of linear multiuser detection with radio resource management concepts like power(More)
Alpha-motoneurons appear to be exceedingly affected in neurodegenerative diseases such as amyotrophic lateral sclerosis (ALS). Morphological and physiological degeneration of this neuronal phenotype is typically characterized by a marked decrease of neuronal markers and by alterations of cholinergic metabolism such as reduced choline acetyltransferase(More)
3GPP Long-term Evolution (LTE) allows operators to use new and wider spectrum and complements 3G networks with higher data rates, lower latency and a flat, IP-based architecture. To further improve the broadband user experience in an ubiquitous and cost-effective manner, 3GPP has been working on various aspects of LTE-Advanced. Since radio link performance(More)
Base station cooperation in the downlink of cellular systems has been recently suggested as a promising concept towards a better exploitation of the communication system’s physical resources. It may offer a high gain in capacity through interference mitigation. This however, comes at a cost of high information exchange between cooperating entities and a(More)
This paper discusses the interaction between high speed downlink packet access (HSDPA) and high speed uplink packet access (HSUPA) scheduling algorithms running in the Node B and other resource management algorithms in the radio network controller (RNC), which are still required to satisfy user-perceived quality. We investigate the effect of load sharing(More)
The standardization of the fourth generation of mobile communication systems was mainly driven by the demands for higher data-rates and improved Quality of Service. To reach these goals interference coordination has been identified as a promising research field for better exploitation of the time and frequency resources. This paradigm shift from(More)