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In recent years, there has been an upsurge of interest in multihop-augmented infrastructurebased networks in both industry and academia, such as the seed concept in 3GPP, mesh networks in IEEE 802.16, and coverage extension of HiperLAN/2 through relays or user-cooperative diversity mesh networks. This article, a synopsis of numerous contributions to Working(More)
This paper focuses on the realization and application of a generic protocol stack for reconfigurable wireless communication systems. This focus extends the field of software-defined radios which usually concentrates on the physical layer. The generic protocol stack comprises common protocol functionality and behavior which are extended through specific(More)
Recent years have witnessed an ever-increasing interest in smart antenna technologies to boost the capacity of existing and future wireless systems. As one of the first standards the wireless metropolitan area network IEEE 802.16 (WiMAX) provides means to support these techniques. This paper investigates the potential of smart antenna beamforming and space(More)
The CDMA based UMTS transmission technology in which all users simultaneously share the same common range of spectrum gets rather affected by system interference. The reduction of interference is therefore a key issue in the development of optimal radio transmission in order to increase system capacity. Power control is a well-known technology to improve(More)
The huge growth in wireless communication has led to a wide range of technologies each addressing a particular scenario or need. The goal of the WINNER project is to develop a single new ubiquitous radio access system concept to address the whole spectrum of mobile communications scenarios. This paper surveys the challenge of providing ubiquitous operation(More)
per REC in a wide-area setup. 3 RNs (red, green, yellow squares) per BS (blue triangle) Abstract—This work presents a low-cost, low complexity deployment concept for a relay-based cellular broadband network. The concept is based on a combination of a multiantenna OFDMA Base Station (BS) and simple, single-antenna OFDMA Relay Nodes (RN) and User Terminals(More)