【摘要】 扫频仪是近年来在移动通信网络规划与优化中广泛应用的新型测量仪器,针对GSM(global system of mobile communication)与TD-SCDMA(time division-synchronous code division multiple acess)双网融合优化的新需求,研究了双模扫频仪技术,介绍了其空时频三维盲检测的系统模型、工作流程以及测量速度分析、兼顾接收机与测量仪器双重特性的关键算法,论述了多通道射频前端与基带电路的硬件设计方案,并给出了主要功能与性能指标的测试结果和应用实例。研制的GSM/TD-SCDMA双模五频段扫频仪,可同时进行GSM与TD-SCDMA两个网络的测量,相比传统的单模路测设备,不仅提高了效能,而且降低了成本,结构更紧凑。更多还原

【Abstract】 Scanner is a novel and powerful instrument for network planning and optimization of mobile communication in recent years.Aiming at the new demand of dual network collaborative planning and optimization,dual mode scanner technologies are studied in this paper.A system model of blind detection in the triple dimensions of space,frequency and time is proposed;then the working scheme is introduced and the factors that influence measurement speed are analyzed.Since the scanner is both a measurement instrument and a communication receiver,a novel gain control scheme is designed to achieve both large dynamic range and good measurement accuracy.Some details of hardware design,such as the function blocks of multi-channel RF front-end and base band circuit are described;the experimental test results of the main specifications and application examples are also introduced.The designed dual mode and five band scanner can simultaneously perform measurements on global system of mobile communication(GSM)and time division-synchronous code division multiple acess(TD-SCDMA)wireless networks;compared with traditional single mode test equipment,the new instrument is more effective and features lower cost and more compact structure.更多还原