低功耗长距离无线收发模块设计与实现

发布时间：2018-03-18 20:05

本文选题：低功耗　切入点：远距离　出处：《电子科技大学》2016年硕士论文　论文类型：学位论文

【摘要】：在无线通信技术飞速发展的大背景下,工业监视与控制、家庭和楼宇自动化、无线警告和安防系统、远程灌溉系统等领域也急速发展,进而催生了大量对无线传输技术的需求。在对无线传输技术需求急剧增长的同时,在某些特殊应用场景下对无线传输高的性能也提出了更高的要求。例如在荒漠、重化工区等人烟稀少场景对无线传输技术的低功耗、远距离传输重视程度日益增长,本文正是为了应对低功耗远距离传输的巨大需求而设计开发一款无线传输模块旨在尽力改善这一局面。对于远距离无线传输,利用电信运营商的蜂窝网络进行数据的传输似乎是唯一不可替代的选择。然而涉及到数据保密和可操控性方面,并非所有的服务提供商都情愿通过电信运营商的蜂窝网来传输数据。其次,通过建设大量基站来进行搭建蜂窝网显然要花费大量人力、财力成本。另外,大量的物联网设备连接至蜂窝网势必会造成蜂窝网的拥堵,对同一网络的其他设备造成干扰。本文正是认识到了电信蜂窝网的弊端并未通过电信蜂窝网而是通过开发低运行功耗的无线射频传输模块来进行远距离的传输。为了开发低功耗远距离的无线射频传输模块,本文采用了面向中国地区的Sx127x系列芯片Sx1278作为无线模块的射频IC。Sx1278采用了升特(Semtech)公司独特的Lo Ra扩频通信技术,且集成了+20d Bm功率放大器,使得该射频IC在维持较低运行功耗的同时在远距离传输方面具有非常卓越的性能。同时结合低功耗MCU处理器STM32L151CBT6、低插入损耗射频开关PE4259、高加速度灵敏度晶振NX2520SA、声表面波滤波器DCC6C设计开发了一款运行在433MHz频段的无线通信模块。该模块可实现了3154.46m的无丢包传输和4851.13m的无断线传输,且最低待机功耗为11.62m W,发射功耗为401.71m W,接收功耗为90.09m W。最终达到了-126.95d Bm的接收灵敏度。
[Abstract]:In the context of the rapid development of wireless communication technology, industrial surveillance and control, home and building automation, wireless warning and security systems, remote irrigation systems, and other fields have also developed rapidly. The demand for wireless transmission technology has increased dramatically, and in some special application scenarios, higher requirements for wireless transmission performance have been put forward, for example, in the desert. Heavy chemical areas and other sparsely populated scenes pay more and more attention to wireless transmission technology due to its low power consumption and long distance transmission. In order to meet the huge demand of low power long-distance transmission, this paper designed a wireless transmission module to try to improve this situation. The use of telecommunications operators' cellular networks for data transmission seems to be the only irreplaceable option. However, when it comes to data confidentiality and controllability, Not all service providers are willing to transmit data through the cellular network of telecom operators. Secondly, building a large number of base stations to build cellular networks will obviously cost a lot of human and financial resources. A large number of Internet of things devices connected to cellular networks are bound to cause congestion in cellular networks. This paper realizes that the disadvantages of telecommunication cellular network are not carried out by telecommunication cellular network but by the development of wireless radio frequency transmission module with low power consumption. In order to develop wireless radio frequency transmission module with low power consumption and long distance, In this paper, the radio frequency IC.Sx1278, which uses the Sx127x series chip Sx1278 as the wireless module for China, adopts the unique Lo Ra spread spectrum communication technology and integrates the 20dBm power amplifier. The RF IC has excellent performance in long distance transmission while maintaining low power consumption. Combined with low power MCU processor STM32L151CBT6, low insertion loss RF switch PE4259, high acceleration sensitivity crystal oscillator NX2520SA, acoustic meter. The surface wave filter (DCC6C) has designed and developed a wireless communication module running at 433MHz frequency band. The module can realize 3154.46m packet free transmission and 4851.13m unbroken transmission. The lowest standby power consumption is 11.62m W, the transmission power consumption is 401.71m W, and the receiving power consumption is 90.09mW. finally, the receiver sensitivity of -126.95dBm is achieved.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TN929.5

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