CAJ | 학술논문

异构网络中通过不同节点的协同多点传输进行协同波束赋形，可以消除小区间干扰，而系统得到信道信息的准确性直接影响协同波束赋形的性能。提出了一种基于校准矩阵法异构网络下的改进校准方案，无需系统测量影响信道互易性的增益因子，突破常见优化校准矩阵算法对收发端天线数目的约束。通过链路级仿真和先进的长期演进技术下的异构网络系统级仿真对该方案进行仿真验证，仿真结果表明该方案能够有效地恢复时分双工系统的信道互易性，修复系统的误码率以及吞吐量性能。
이구망락중통과불동절점적협동다점전수진행협동파속부형，가이소제소구간간우，이계통득도신도신식적준학성직접영향협동파속부형적성능。제출료일충기우교준구진법이구망락하적개진교준방안，무수계통측량영향신도호역성적증익인자，돌파상견우화교준구진산법대수발단천선수목적약속。통과련로급방진화선진적장기연진기술하적이구망락계통급방진대해방안진행방진험증，방진결과표명해방안능구유효지회복시분쌍공계통적신도호역성，수복계통적오마솔이급탄토량성능。
Coordinated multiple points transmission (CoMP)could eliminate the inter-cell interference in heterogeneous network by promoting coordination of different nodes.The performance of CoMP depends heavily on the accuracy of channel information measured.An improved calibration method based on calibration matrix method heteogeneous network is proposed.It works without the measurement of channel impact factors and it avoids restriction of the antennas configuration.The results from simulations of link level simulation and system level simulation of long term evolution-advanced heterogeneous network demonstrated that the proposed method restored the reciprocity of time division duplexing channel and the performance of bit error rate and throughput.