CAJ | 학술논문

电力仪表无线互联能给用户带来极大便利，然而又面临复杂电磁环境下无线通信的抗干扰问题。分析了电磁环境的复杂性，即每个通信节点所接收的信号和干扰通常多方向，且波达角不定。建立了直流电机干扰仿真模型，提出了基于波束成形技术抑制干扰的方法，即首先由MUSIC算法估计了干扰波的波达角，再基于LCMV算法进行波束形成。仿真结果表明，该方法有效抑制了干扰，通信链路的误比特率得到显著改善。
전력의표무선호련능급용호대래겁대편리，연이우면림복잡전자배경하무선통신적항간우문제。분석료전자배경적복잡성，즉매개통신절점소접수적신호화간우통상다방향，차파체각불정。건립료직류전궤간우방진모형，제출료기우파속성형기술억제간우적방법，즉수선유MUSIC산법고계료간우파적파체각，재기우LCMV산법진행파속형성。방진결과표명，해방법유효억제료간우，통신련로적오비특솔득도현저개선。
The wireless interconnection of electric meters has brought great convenience to the users,but it faces with the anti?interference problem of wireless communication in complex electromagnetic environment. The complexity of the electromag?netic environment is analyzed,in which the received signal and interference of each communication node are generally polydirec?tional,and the direction of arrival(DOA)is uncertain. The interference simulation model of DC motor was established. The in?terference suppression method based on beamforming technology is proposed,in which the DOA of interference wave is estimated by MUSIC algorithm,and then the beamforming is calculated based on LCMV algorithm. The simulation results indicate this method can restrain the interference effectively,and improve the bit error rate(BER)of communication link significantly.