两小区MIMO系统上行干扰对齐传输

Two-cell MIMO uplink interference alignment transmission

提出了两种新颖的基于干扰对齐技术的两小区多输入多输出上行传输系统方案,并推导出相应每种方案下的系统自由度.第1种方案是部分选择型干扰对齐,通过利用未参与干扰对齐处理的接收信号,可以得到比传统的选择型干扰对齐方案更大的自由度;第2种方案是混合型干扰对齐,通过综合使用部分选择型干扰对齐和部分固定型干扰对齐,从而获得最大的系统自由度.仿真结果验证了所提方案比现有方案可取得更好的性能.

Two novel interference alignment （ IA ） schemes are proposed for the two‐cell MIMO uplink transmission system and their respective achievable degrees of freedom （DoF） are derived . The first scheme is the partial selective IA , which can achieve a higher DoF than the traditional selective IA by exploiting the received signals not involved in the IA . The second scheme is the hybrid IA , which exploits both partial selective IA and partial fixed IA schemes and results in the highest DoF compared to these two candidate IA schemes . Simulation results show that the proposed schemes outperform the existing schemes .