Title :
Power saving effect of sensor collaborative beamforming for wireless ubiquitous network systems
Author :
Tokunaga, Sousuke ; Kawakami, Yoshihisa ; Hashimoto, Kenichi ; Tomisato, Shigeru ; Denno, Satoshi ; Hata, Masaharu
Author_Institution :
Grad. Sch. of Natural Sci. & Technol., Okayama Univ., Okayama
Abstract :
This paper evaluates transmission performance and power-saving effect of the collaborative beamforming for wireless ubiquitous network systems. The evaluation of power-saving includes the power consumption for signal transmission to collaborative sensors in beamforming. The simulation result shows that the total power consumption of the beamforming with 3 collaborative sensors can be decreased to about 1/2 compared with that of a transmitting sensor without the beamforming in free-space propagation channels. In typical mobile propagation channels with shadowing, the total power consumption of the beamforming by using 3 collaborative sensors can be reduced to 1/7 of that without the beamforming. The above results confirm that the collaborative beamforming can be achieve lower power consumption, and greatly contributes to realize low-power transmission in wireless sensor network systems.
Keywords :
array signal processing; ubiquitous computing; wireless channels; wireless sensor networks; collaborative sensors; free-space propagation channel; mobile propagation channel; power consumption; power saving effect; sensor collaborative beamforming; signal transmission; transmission performance; wireless ubiquitous network system; Array signal processing; Bit error rate; Collaboration; Computer simulation; Electronic mail; Energy consumption; Informatics; Power engineering and energy; Sensor systems; Wireless sensor networks; Sensor Collaboration; Sensor Network; Transmit Beamforming;
Conference_Titel :
Communications, 2008. APCC 2008. 14th Asia-Pacific Conference on
Conference_Location :
Tokyo
Print_ISBN :
978-4-88552-232-1
Electronic_ISBN :
978-4-88552-231-4
