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中文摘要：
针对超高频和微波段射频识别系统（RFID）信号在噪声干扰和多标签环境下难以辨识的问题，提出一种新的RFID信号辨识方法。以均匀直线阵为基础，采用空间谱估计算法正确估计出波达方向（DOA），再根据信号波达方向通过数字波束形成技术产生自适应定向波束来辨识信号。仿真分析表明，该方法具有较低的信噪比门限和较高的信号辨识和防碰撞性能。
英文摘要：
A novel identification method of radio frequency identification （RFID） system signals in UHF and microwave band is presented, according to the difficulty of RFID signals identification in the noise interference and multiple-tags environment. Based on uniform linear array, by applying spatial spectrum estimation algorithm, direction-of-arrivals （DOAs） of RFID signals are estimated properly. Then, by adapting digital beamforming technique and applying the DOAs, adaptive directional beam is formed to identify RFID signals. Simulation results demonstrate that the identification method possesses a lower SNR threshold as well as a better signals identification and anti-collision capability.
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