Hierarchic Beamforming with Limited Feedback Between Remote Radio Heads and Baseband-Unit Pool

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The Problem:

Joint transmission (JT), in which adjacent transmitters, coordinate their transmission jointly to form a cluster, which serves several mobile terminals, is an important tool for enhancing spectrum utilization. Not surprisingly, there is a constant growing demand for high data rate. Both the demand and the rapid increase in the number of cellular consumers have led to aggressive frequency reuse, thus enhancing co-channel interference between adjacent cells. Such interference significantly degrades system throughput, particularly to cell edge users.

The Solution:

We propose a novel scheme that transforms the interference into a useful signal.

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