CAJ | 학술논문

在无线通信系统中,基站可以根据信道互易性使用波束成形(Beam Forming)技术提升系统性能.信道互易性的准确程度对性能是有影响的,因此需要对其分析以指导系统设计.对长期演进(LTE)系统的互易性进行建模,指出了终端发送天线和接收天线数目的不对称性,以及基站信道估计的误差对信道互易性的影响.通过数值仿真验证了不理想的信道互易性使波束成形性能受到损失,并为系统改进提出思路.其结论容易推广到其他应用波束成形的无线通信系统.
재무선통신계통중,기참가이근거신도호역성사용파속성형(Beam Forming)기술제승계통성능.신도호역성적준학정도대성능시유영향적,인차수요대기분석이지도계통설계.대장기연진(LTE)계통적호역성진행건모,지출료종단발송천선화접수천선수목적불대칭성,이급기참신도고계적오차대신도호역성적영향.통과수치방진험증료불이상적신도호역성사파속성형성능수도손실,병위계통개진제출사로.기결론용역추엄도기타응용파속성형적무선통신계통.
In wireless communication systems,the base station can use beam forming to improve performance based on channel reciprocity. The performance depends on accuracy of channel reciprocity,which should be an-alyzed so as to guide system design. This paper models the channel reciprocity in LTE(Long Term Evolution) systems,and then points out that the mis-match between the transmitter and receiver antenna number of the user equipment and the channel estimation error at the base station can make the channel reciprocity non-ideal. Sim-ulation verifies that the performance of the beam forming is degraded by the non-ideal channel reciprocity. Ideas to improve system performance are proposed. The conclusions are easily applied for other wireless communication systems with beam forming.