【作者】 丁冬冬； 束锋； 王建新； 陆锦辉；

【Author】 Ding Dongdong;Shu Feng;Wang Jianxin;Lu Jinhui;School of Electronic and Optical Engineering,Nanjing University of Science and Technology;National Mobile Communications Research Laboratory,Southeast University;

【机构】 南京理工大学； 东南大学；

【摘要】 抑制同信道干扰是自动识别系统中最具挑战性问题之一,为了解决此问题,提出一种简单的串行接收机结构。该结构首先采用ESPRIT或MUSIC等算法估计出目标信号和干扰信号的波达方向角,然后利用MVDR、MF、MMSE等波束成形算法中的一个将阵列方向对准期望信号入射方向抑制干扰信号,最后采用二比特差分解调算法检测有用信号。仿真结果表明:文中提出的结构同单天线接收机相比,显著地抑制了同信道干扰,明显地改善了GMSK解调的误比特性能,可应用于未来自动识别系统卫星接收机。更多还原

【Abstract】 Suppressing co-channel interference(CCI) is one of the most challenging issues of the Automatic Identification System(AIS).A simple serial receiver structure is proposed.In this structure,all incident angles of all desired and interference signals are estimated by MUSIC or ESPRIT.Then one of MVDR,MMSE and MF beamforming algorithms is employed to make the steering vector align with the DOA of desired signal to suppress interference signals.Finally,a two-bit differential demodulation algorithm is applied to detect useful signal.The simulation results show that,the proposed structure,compared with the case of single-antenna re-ceiver,significantly suppresses the CCI and notably improves the bit error rate performance of GMSK.This structure can be applied in the future AIS satellite receiver.更多还原