CAJ | 학술논문

全球移动通信系统（GSM）无源探测系统中的强直达波干扰（DPI）抑制技术研究是当前一项艰巨而又极具挑战性的课题，已成为能否实现无源探测的关键。依据GSM信号下行链路导频信号的特点以及直达波的抑制要求，在空域采用了线性约束最小方差（LCMV）准则下的自适应波束形成与宽零陷相结合的空域抑制算法。理论分析和仿真结果均表明基于GSM的无源探测系统在此算法下可获得不低于55 dB的直达波干扰抑制。
전구이동통신계통（GSM）무원탐측계통중적강직체파간우（DPI）억제기술연구시당전일항간거이우겁구도전성적과제，이성위능부실현무원탐측적관건。의거GSM신호하행련로도빈신호적특점이급직체파적억제요구，재공역채용료선성약속최소방차（LCMV）준칙하적자괄응파속형성여관령함상결합적공역억제산법。이론분석화방진결과균표명기우GSM적무원탐측계통재차산법하가획득불저우55 dB적직체파간우억제。
At present,the research of direct path interference (DPI) suppression technology in passive detection system based on global system for mobile communication(GSM)is difficult and challenging,which is directly related to the realization of the passive detection. According to the features of the GSM downlink pilot signal and the DPI suppression requirement,a spa-tial filtering algorithm based on the direction information and a least square null constraint optimization is proposed. Theoretical analysis and simulation results show that the GSM-based passive detection system can achieve DPI suppression at least 55 dB by using the proposed algorithm.