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The increasing popularity of applications involving group communications in wireless networks has led to the need for efficient multicasting solutions. The ability of smart antennas to beamform and hence improve the signal quality at the clients has made them especially attractive for multicasting applications. Unfortunately, the problem of multicast beamforming design is a non-convex optimization...
In this paper we investigate the issue of exploiting switched beamforming antennas to improve multicast transmission in wireless networks. Under the practical assumptions that different beams may have arbitrary overlapping patterns and that each user can receive data at different rates under different beams, we formulate the problem as minimizing the total multicast delay subject to the constraint...
Using beamforming antennas to improve wireless multicast transmissions has received considerable attention recently. The work in [7] proposes to partition all single-lobe beams into groups and to form composite multi-lobe beam patterns to transmit multicast traffic. The key challenge left is, how to partition the beams into multiple groups in order to minimize the total multicast delay. This work...
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