Title :
A 4 Mbps infrared wireless communication system dedicated to mobile computing
Author :
Uno, Hiroshi ; Kumatami, K. ; Okuhata, Hiroyuki ; Shirakawa, Isao ; Chiba, Toru
Author_Institution :
Dept. of Inf. Syst. Eng., Osaka Univ., Japan
Abstract :
A high performance and low power architecture is devised for a 4 Mbps infrared wireless communication system dedicated to the mobile computing. In this architecture, 4PPM(4-Pulse Position Modulation) infrared signals detected by an infrared receiver are digitized into TTL interface level pulses, and the digitized pulses are demodulated by a 1-bit digital demodulator. To improve the dynamic range of the link length, a 4PPM demodulator is synthesized to implement a demodulation algorithm which is constructed so as to accommodate the output tolerance of the infrared receiver. A part of experimental results shows that the realized 4 Mbps infrared communication system can achieve an error free link in the range of 0-140 cm at 90 mW power consumption
Keywords :
data communication; demodulation; digital communication; optical communication; optical links; optical modulation; portable computers; pulse position modulation; wireless LAN; 0 to 140 cm; 4 Mbit/s; 4-pulse position modulation; 4PPM demodulator; 4PPM infrared signals; 90 mW; IR wireless link; TTL interface level pulses; demodulation algorithm; digital demodulator; error free link; infrared receiver; infrared wireless communication system; low power architecture; mobile computing; Computer architecture; Demodulation; High performance computing; Infrared detectors; Mobile computing; Optical computing; Optical fiber communication; Optical receivers; Pulse modulation; Wireless communication;
Conference_Titel :
Circuits and Systems, 1996., IEEE Asia Pacific Conference on
Conference_Location :
Seoul
Print_ISBN :
0-7803-3702-6
DOI :
10.1109/APCAS.1996.569284
