2.4GHz ZigBee与WiFi以及蓝牙系统间干扰分析

发布时间：2018-01-08 18:13

  本文关键词：2.4GHz ZigBee与WiFi以及蓝牙系统间干扰分析　出处：《西安电子科技大学》2014年硕士论文　论文类型：学位论文

  更多相关文章： ZigBee WiFi 蓝牙 干扰

【摘要】：随着无线通信技术的快速发展，尤其是短距离无线通信技术的迅猛发展，越来越多的无线通信技术应用设备在人们的日常生活中出现。ISM2.4GHz是全球唯一公开的频段，许多系统在此频段上工作，例如ZigBee、WiFi、Bluetooth、以及无线USB。日益增多的短距离无线通信技术在2.4GHz上工作，这就导致不同系统间相互干扰的问题变得日益严重，，并且这种干扰是不可避免的。其中ZigBee与WiFi和蓝牙之间的干扰尤其受到重视。虽然WiFi、蓝牙同ZigBee相比，具有不同的的设计用途，并且它们两个的技术发展比ZigBee技术早，但是在日常的应用当中，很可能在近距离内共存。所以ZigBee系统必定会受到其他系统的电磁兼容干扰，尤其是WiFi系统和蓝牙系统。所以，研究ZigBee系统在受到来自WiFi设备系统以及蓝牙系统设备所发出信号干扰时性能的变化是十分必要的。 本文首先介绍了IEEE802.15.4协议的物理层的帧结构，信道分配以及调制和扩频技术。接着，分别对WiFi系统以及蓝牙系统的物理层协议和特点做了简单介绍。 本文通过Matlab中的simulink仿真，在没有WiFi和蓝牙信号干扰并且其他信道条件不变的情况下，只改变SNR的值，得到相应的BER与PER值，当PER值小于等于阈值1%时，可以说在接收端可以成功接收到发送端所发送的信号。可以统计出此ZigBee系统的性能；并假定ZigBee与WiFi、蓝牙此三个系统同时发送消息，在SNR分别等于5dB，3dB以及0dB时，改变SIR的值，根据得到的PER值，统计出WiFi以及蓝牙分别对ZigBee系统的干扰影响，以及两者同时干扰ZigBee系统时，分析此系统的性能。
[Abstract]:With the rapid development of wireless communication technology, especially the rapid development of short-range wireless communication technology. More and more wireless communication technology applications appear in people's daily life. ISM 2.4 GHz is the only open frequency band in the world. Many systems work in this band, such as ZigBee. WiFiO Bluetooth, as well as wireless USB.The growing number of short-range wireless communications technologies operate at 2.4 GHz. As a result, the problem of interferences between different systems becomes more and more serious. And this kind of interference is inevitable. The interference between ZigBee and WiFi and Bluetooth is paid more attention. Although WiFi. Bluetooth is compared with ZigBee. There are different design uses, and both of them developed earlier than ZigBee technology, but in everyday applications. It is likely to coexist at close range, so ZigBee systems are bound to be subject to EMC interference from other systems, especially WiFi and Bluetooth systems. It is necessary to study the performance of ZigBee system when it is interfered by signals from WiFi system and Bluetooth system. This paper first introduces the frame structure, channel allocation, modulation and spread spectrum technology of the physical layer of IEEE802.15.4 protocol. The physical layer protocol and characteristics of WiFi system and Bluetooth system are introduced. In this paper, the simulink simulation in Matlab, without WiFi and Bluetooth signal interference and other channel conditions unchanged, only change the value of SNR. The corresponding BER and PER values are obtained when the PER value is less than or equal to the threshold value of 1. It can be said that the signal transmitted by the transmitter can be successfully received at the receiving end, and the performance of the ZigBee system can be calculated. It is assumed that ZigBee and WiFiand Bluetooth systems send messages simultaneously. When the SNR is equal to 5 dB and 0 dB respectively, the value of SIR is changed according to the obtained PER value. The interference effects of WiFi and Bluetooth on ZigBee system are analyzed, and the performance of ZigBee system is analyzed when both of them interfere with ZigBee system at the same time.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN92

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