Konstantinos Ntougias

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— Exploiting additional radio spectrum is key to respond to the unprecedented capacity demands of mobile broad-band communication systems in recent years. In fact, most of the frequency bands suitable for mobile communications are already in use by other radio services, and spectrum refarming is usually not possible or constitutes a highly time-consuming(More)
Recently, several advanced multi-antenna radio communications technologies have emerged to meet the increased capacity demands in wireless multiuser networks. Despite their great potential, the extent of these techniques' practical applicability still remains questionable, since they have to face either backhaul limitations or cost and hardware constraints.(More)
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