多频段远程电调倾角天线控制器设计

摘要

提出一种符合AISG2.0协议规范的多频段远程电调天线(multi-band remote electronic tilting antenna,MRE-TA)嵌入式控制器解决方案.根据AISG2.0协议物理层的规范要求,设计了一款基于分离元器件的OOK(on-offkeying)调制和解调电路,详细阐述了调节其接收灵敏度和输出功率的方法与工作原理;分析了MRETA中浪涌电流的特点,设计了一种在反复上电、断电情况下仍能满足协议规范及基站系统要求的浪涌电流抑制电路;给出了带位置反馈的多频段移相器下倾角闭环控制模块的硬件设计思路;介绍了AISG2.0协议栈及下倾角控制模块的软件实现方法;最后给出了该设计方案电气性能及协议互操作的测试结果.测试和实际应用证明,该设计方案的硬件性能和协议完整性完全符合AISG2.0规范要求,并具有互操作兼容性好、长期运行稳定可靠的优点.%The design scheme of embedded controller in MRETA (multi-band remote electronic tilting antenna) which meets AISG2.0 requirement was present.According to the physical layer requirement of AISG2.0,one OOK (on-off keying) modem circuit which is composed of discrete component was present,and the working principle of how to modify its receiving sensitivity and output power were discussed in details.The feature of MRETA's inrush current was analyzed,and one inrush current suppression circuit was designed,which can meet the corresponding requirement even when the power was frequently switched on and off.The hardware design idea of MRETA tilt angle control module with position feedback was proposed.The software implement methods of protocol stack and tilt angle control function were investigated.Finally,hardware performance and IOT (interoperability test) result were present.Test and application results show that this proposed design scheme sound conforms to AISG2.0 in the electronic performance and protocol integrity,and features its good interoperation compatibility and long-term reliability.