本文關(guān)鍵詞：2.4GHz ZigBee與WiFi以及藍(lán)牙系統(tǒng)間干擾分析　出處：《西安電子科技大學(xué)》2014年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： ZigBee WiFi 藍(lán)牙 干擾

【摘要】：隨著無(wú)線(xiàn)通信技術(shù)的快速發(fā)展，尤其是短距離無(wú)線(xiàn)通信技術(shù)的迅猛發(fā)展，越來(lái)越多的無(wú)線(xiàn)通信技術(shù)應(yīng)用設(shè)備在人們的日常生活中出現(xiàn)。ISM2.4GHz是全球唯一公開(kāi)的頻段，許多系統(tǒng)在此頻段上工作，例如ZigBee、WiFi、Bluetooth、以及無(wú)線(xiàn)USB。日益增多的短距離無(wú)線(xiàn)通信技術(shù)在2.4GHz上工作，這就導(dǎo)致不同系統(tǒng)間相互干擾的問(wèn)題變得日益嚴(yán)重，，并且這種干擾是不可避免的。其中ZigBee與WiFi和藍(lán)牙之間的干擾尤其受到重視。雖然WiFi、藍(lán)牙同ZigBee相比，具有不同的的設(shè)計(jì)用途，并且它們兩個(gè)的技術(shù)發(fā)展比ZigBee技術(shù)早，但是在日常的應(yīng)用當(dāng)中，很可能在近距離內(nèi)共存。所以ZigBee系統(tǒng)必定會(huì)受到其他系統(tǒng)的電磁兼容干擾，尤其是WiFi系統(tǒng)和藍(lán)牙系統(tǒng)。所以，研究ZigBee系統(tǒng)在受到來(lái)自WiFi設(shè)備系統(tǒng)以及藍(lán)牙系統(tǒng)設(shè)備所發(fā)出信號(hào)干擾時(shí)性能的變化是十分必要的。 本文首先介紹了IEEE802.15.4協(xié)議的物理層的幀結(jié)構(gòu)，信道分配以及調(diào)制和擴(kuò)頻技術(shù)。接著，分別對(duì)WiFi系統(tǒng)以及藍(lán)牙系統(tǒng)的物理層協(xié)議和特點(diǎn)做了簡(jiǎn)單介紹。 本文通過(guò)Matlab中的simulink仿真，在沒(méi)有WiFi和藍(lán)牙信號(hào)干擾并且其他信道條件不變的情況下，只改變SNR的值，得到相應(yīng)的BER與PER值，當(dāng)PER值小于等于閾值1%時(shí)，可以說(shuō)在接收端可以成功接收到發(fā)送端所發(fā)送的信號(hào)�？梢越y(tǒng)計(jì)出此ZigBee系統(tǒng)的性能；并假定ZigBee與WiFi、藍(lán)牙此三個(gè)系統(tǒng)同時(shí)發(fā)送消息，在SNR分別等于5dB，3dB以及0dB時(shí)，改變SIR的值，根據(jù)得到的PER值，統(tǒng)計(jì)出WiFi以及藍(lán)牙分別對(duì)ZigBee系統(tǒng)的干擾影響，以及兩者同時(shí)干擾ZigBee系統(tǒng)時(shí)，分析此系統(tǒng)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.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TN92

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