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A Simple Energy Efficient Transceiver based on Constant-Envelop for IEEE 802.15.4
Wang Chen 1,Wenjie Wang 2 *,Qinye Yin 2
1.Ministry of Education Key Lab for Intelligent Networks and Network Security, Xi’an Jiaotong University, Xi’an 710049
2.Ministry of Education Key Lab for Intelligent Networks and Network Security, Xi’an Jiaotong University, Xi’an, Shaanxi, 710049 P. R. China
*Correspondence author
#Submitted by
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Funding: the National Natural Science Foundation of China （No.No. 60772095, 60971113）, the Ph.D. Programs Foundation of Ministry of Education of China （No.No.200806980020）, the Funds for Creative Research Groups of China（No.No. 60921003）
Opened online:12 January 2012
Accepted by: none
Citation: Wang Chen ,Wenjie Wang,Qinye Yin.A Simple Energy Efficient Transceiver based on Constant-Envelop for IEEE 802.15.4[OL]. [12 January 2012] http://en.paper.edu.cn/en_releasepaper/content/4458831
 
 
Efficient transmission has always been a major issue for wireless sensor networks (WSN) due to the fact that the nodes are usually battery-powered. Wireless communication accounts for a strikingly large proportion of the total power consumption of a node. In this paper, we reduce the power consumption in the physical layer by designing a low-power transceiver. IEEE 802.15.4 is a popular communication protocol with many good features that can be used for power-saving. We design a simple energy efficient transceiver for IEEE 802.15.4. It utilizes the constant-envelope feature of the offset quadrature phase shift keying (O-QPSK) signal with half-sine shaping defined in the protocol to simplify the structure of the transceiver. Compared with conventional transceivers, the proposed transceiver uses a hard-limiter (inverter) to replace the digital-to-analog converter (DAC) and the analog-to-digital converter (ADC), which results in a much simpler structure and lower power consumption. Furthermore, the correlation operation could be efficiently implemented just by a reversible counter. The performance of the proposed transceiver is effectively demonstrated by both computer simulations and hardware tests.
Keywords:O-QPSK; const-envelop; hard-limit; energyefficient; IEEE 802.15.4
 
 
 

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