CAJ | 학술논문

针对三小区多用户MIMO干扰信道系统，通过一个启发性例子，联合设计发射预编码矩阵和接收赋形矩阵，给出基于特征向量闭式解的干扰对齐优化算法，相比已有干扰对齐算法，用户端可使用更少的天线资源获得相同的自由度性能，且只需本小区内用户协作共享信道信息；并归纳出普适场景下系统配置与可达自由度之间的关系：设定每个小区中的基站配置M根天线和K个用户，用户配置N根天线，各个基站对本小区中每个用户都发送d个数据流，当M=N≥2 Kd时，所提算法总共可获得3 Kd个自由度。所提算法可以完全消除小区间干扰和用户间干扰，相比传统的正交化干扰抑制算法，系统容量得到了明显地提升。
침대삼소구다용호MIMO간우신도계통，통과일개계발성례자，연합설계발사예편마구진화접수부형구진，급출기우특정향량폐식해적간우대제우화산법，상비이유간우대제산법，용호단가사용경소적천선자원획득상동적자유도성능，차지수본소구내용호협작공향신도신식；병귀납출보괄장경하계통배치여가체자유도지간적관계：설정매개소구중적기참배치M근천선화K개용호，용호배치N근천선，각개기참대본소구중매개용호도발송d개수거류，당M=N≥2 Kd시，소제산법총공가획득3 Kd개자유도。소제산법가이완전소제소구간간우화용호간간우，상비전통적정교화간우억제산법，계통용량득도료명현지제승。
Aiming at the three-cell multi-user multiple-input multiple-output ( MIMO) channels system, an improved IA-based algorithm is proposed, while the transmit precoding matrices and receive beamform-ing matrices are described, and a closed-form solution based on the eigenvector is provided. The proposed scheme exploits less antenna resources than previous one in getting the same degrees of freedom ( DoF) , and requires cooperation only in local cell. When each base station ( BS) is equipped with M antennas, each mobile station ( MS) is equipped with N antennas on the cell-boundary of each BS which sends d da-ta streams to K users in its cell. It is shown that total 3Kd degrees of freedom (DoF) could be achievable. Inter-user interference ( IUI) and inter-cell interference ( ICI) can be eliminated by the proposed IA al-gorithm, and the sum-rate is greatly improved as compared with the conventional techniques.