CAJ | 학술논문

在K多用户多输入多输出（MIMO）干扰信道下，通过协作共享信道状态信息，使用干扰对齐可以在高信噪比情况下能实现K/2自由度传输。然而在一定的自由度下，能获得的传输吞吐量还与所采用的预编码有重要的关系。在传统的基于特征向量的干扰对齐方法基础上，通过构造特征向量的优化空间，提出以最大化和速率为准则进行预编码的优化设计，给出两种优化算法，并通过进一步修改使其可以用于非理想信道状态信息下的预编码设计。仿真结果表明，在两种信道信息条件下所提出的优化算法比现有的一些基于特征向量的方法和速率得到提升。
재K다용호다수입다수출（MIMO）간우신도하，통과협작공향신도상태신식，사용간우대제가이재고신조비정황하능실현K/2자유도전수。연이재일정적자유도하，능획득적전수탄토량환여소채용적예편마유중요적관계。재전통적기우특정향량적간우대제방법기출상，통과구조특정향량적우화공간，제출이최대화화속솔위준칙진행예편마적우화설계，급출량충우화산법，병통과진일보수개사기가이용우비이상신도상태신식하적예편마설계。방진결과표명，재량충신도신식조건하소제출적우화산법비현유적일사기우특정향량적방법화속솔득도제승。
By sharing the channel state information in cooperation,it is proved that in K-user MIMO interference channel the transmissionwith K/2 degrees of freedom can be implemented in high signal-to-noise ratio situation by using interference alignment (IA).However,undercertain degrees of freedom the transmission throughput obtained is much related to the preceding methods employed.In this paper,on thebasis of conventional eigenvector-based IA method,we propose to optimise the precoder design with the guideline of the maximisation and therate together with two precoder optimisation methods by constructing the optimisation space of eigenvectors,and through further modificationthey can be applied to the precoding design in non-ideal channel state information case.Simulation results show that the optimisation methodsproposed under the condition of two channel information cases achieve the improvement in sum rate compared with those eigenvector-basedmethods.