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On Downlink Beamforming With Small Cells in Wireless Heterogeneous Systems

机译:无线异构系统中小小区的下行波束成形

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In this letter, we study downlink beamforming for wireless heterogeneous networks with two groups of users. The users in one group (group 1) are supported by the smallcell base station (SBS) as well as the macrocell base station (MBS), while the users in the other group (group 2) are supported by the MBS only. The MBS is equipped with an antenna array for downlink beamforming. We formulate a convex optimization problem, which can be solved by semidefinite programming (SDP) relaxation, for downlink beamforming that takes advantage of the presence of the SBS for group 1, but also takes into account the interfering signal from the SBS for group 2.
机译:在这封信中,我们研究了具有两组用户的无线异构网络的下行链路波束成形。小型蜂窝基站(SBS)和宏蜂窝基站(MBS)支持一个组(第1组)中的用户,而MBS仅支持另一组(第2组)中的用户。 MBS配备了用于下行链路波束成形的天线阵列。我们为凸波束优化制定了一个凸优化问题,可以通过半定规划(SDP)松弛解决该问题,这是针对下行波束成形的,它利用了第1组的SBS的存在,但也考虑了第2组的SBS的干扰信号。

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