Variation of Received Signal Strength in Wireless Sensor Network
Semiconductor manufacturers provide low-cost, lowpower and short-range solutions for the application of Wireless Sensor Network (WSN), such as ZigBee, Bluetooth, Wi-Fi etc. The quality of radio frequency signal, which carries information in wireless communication channel, is the key to WSN. But it is easily influenced by the external environment. Received Signal Strength Indicator (RSSI) is a measurement for the quality of radio frequency signal which is often used in field of space localization. This paper comprehensively analyses the characteristics of RSSI possibly influenced by the factors such as temperature, the height of sensor nodes position, the type of antenna and the electromagnetic interference of human body. We found that the attenuation of Received Signal Strength (RSS) varies about 5.0 dBm with the change of temperature in every 10 centigrade. The ground can reduce the radiation area of wireless signal, so that RSS is dramatically influenced by the height of its position. Patch antenna causes the attenuation of RSS about 11.2 dBm larger than helix antenna in the distance of 25 m. If the sensor node is wore in human body, the posterior position leads to the attenuation of RSS about 13.0—16.2 dBm larger than anterior position in a specified distance range due to the electromagnetic interference of human body. Finally, some improvement devices were raised here for the WSN in the application of home healthcare according to the qualified effects of various environmental factors.
Received Signal Strength Indicator (RSS1) Wireless Sensor Network (WSN) signal attenuation signal detection
Lisheng Xu Feifei Yang Yuqi Jiang Lei Zhang Cong Feng Nan Bao
Sino-Dutch School of Biomedical and Information Engineering, Northeastern University, Shenyang 11000 Sino-Dutch School of Biomedical and Information Engineering, Northeastern University, Shenyang 11000
国际会议
2011 3rd International Conference on Advanced Computer Control(2011年IEEE第三届高端计算机控制国际会议 ICACC2011)
哈尔滨
英文
151-154
2011-01-18（万方平台首次上网日期，不代表论文的发表时间）