韦巍.TD-LTE信号稳幅环路设计[J].国外电子测量技术,2016,35(6):6-9
TD-LTE信号稳幅环路设计
Circuit design for TD-LTE signal stability
  
DOI:
中文关键词:  LTE  稳幅  环路  子帧
英文关键词:LTE  fixed amplitude  closed loop  subframe
基金项目:国家科技重大专项(2015ZX03001010)资助项目
作者单位
韦巍 1.中国电子科技集团公司第四十一研究所 蚌埠 233000; 2.电子信息测试技术安徽省重点实验室 蚌埠 233000 
AuthorInstitution
Wei Wei 1. The 41st Research Institute Of CETC, Bengbu 233000,China ;2.The key laboratory of Electronic testing technology in anhui province, Bengbu 233000,China 
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中文摘要:
      介绍了一种LTE信号功率稳幅系统,采用有效值检波技术实现高速实时采样,数字脉冲稳幅技术进行功率控制。根据LTE脉冲调制信号的特点,利用FPGA高精度计数器测量通道延迟时间,计算出实时采样时刻;给出了基于FPGA处理控制,包含电调衰减器、放大器、耦合器、检波器及调制器在内的环路设计方案,设计出针对脉冲调制信号稳幅的软件算法系统。实验表明:该系统在2~3 GHz宽频带内,实现了功率稳定控制,误差在0.5 dBm以内,保证了平坦的功率特性,满足宽频带、高精度、功率稳定输出的要求。
英文摘要:
      A stable power system of LTE signal is introduced, the effective value detection technology is adopted to reach high speed real-time sampling, stable power technology of digital pulse is adopted for power control. According to the characteristics of the LTE pulse modulation signal, we use FPGA counter to measure channel delay time;A loop design based on FPGA processing control is given, containing electrically adjustable attenuator, amplifier, coupler detector and modulator; A software algorithm system is designed for the stability of the pulse modulated signal. Experiments show that the power stability control is realized with the error less than 0.5dBm, and the flat power characteristic is guaranteed in the 2GHz~3GHz wide frequency band, the system can satisfy the requirements of wide band, high precision and stable power output.
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