Multiuser Overhearing for Cooperative Two-Way Multiantenna Relays

Multiuser Overhearing for Cooperative Two-Way Multiantenna Relays
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协作双向多天线中继的多用户监听

DOI:
10.1109/tvt.2015.2441879
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发表时间:
2016-05
影响因子:
6.8
通讯作者:
Yang Luxi
Yang Luxi
中科院分区:
计算机科学2区
文献类型:
--
作者:
Li Chunguo;Yang Hyun Jong;Sun Fan;Cioffi John M.;Yang Luxi

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提出了一种用于双向协作多天线中继系统的监听协议,该系统中,多个中继站协同工作,在基站和两个用户设备之间进行信号中继。在所提出的偷听协议中,处于上行链路传输阶段的UE仅在第一时隙中进行传输,即,它在第二时隙中保持静默,而先前的偷听协议假设UE也在第二时隙中进行发送。因此,所提出的偷听协议是更功率有效的。在每个协作中继的预编码矩阵优化的意义上,最大限度地减少加权均方误差(WMSE)。仿真结果表明,该方案不仅具有较低的均方误差,而且具有较高的可达和速率比现有的合作中继方案。
In this paper, an overhearing protocol is proposed for two-way cooperative multiantenna relaying systems, where the relays equipped with multiple antennas collaborate to relay signals between the base station (BS) and two user equipment units (UEs). In the proposed overhearing protocol, the UE in the uplink transmission phase transmits only in the first time slot, i.e., it remains silent in the second time slot, whereas the previous overhearing protocol assumes that the UE transmits also in the second time slot. Therefore, the proposed overhearing protocol is more power efficient. The precoding matrix at each cooperative relay is optimized in the sense of minimizing the weighted mean squared error (WMSE). Simulation results show that the proposed scheme shows not only lower mean squared error but also higher achievable sum rate than existing cooperative relaying schemes.
具有单独功率约束的非对称双向放大和转发中继的自适应功率控制
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