Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/46879
Title: FQPSK-2 high speed modem for infrared wireless LAN
Authors: Perez-Jimenez, Rafael 
Rabadan, Jose A. 
Ortega, David
Melian, Victor M. 
Betancor, Manuel J.
UNESCO Clasification: 3307 Tecnología electrónica
Keywords: Modems
Wireless LAN
Local area networks
Oscillators
Amplitude modulation, et al
Issue Date: 1996
Journal: IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
Conference: Proceedings of the 1996 7th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'96. Part 3 (of 3) 
Abstract: The design and evaluation of a modem prototype, based on FQPSK-2 modulation, is presented. Its main application is wireless infrared local area networks. The bit rate of this prototype is 2 Mb/s, but this magnitude can be taken up to 4.8 Mb/s just by substituting the quartz crystals on the oscillator and the A/D and D/A converters in the emitter low-pass filters of the receiver. The design is full-digital in order to allow its integration on a single chip. We have chosen FQPSK-2 modulation due to its high spectral efficiency (300% better than GMSK), robustness against jitter and the constant amplitude of its complex envelope. This permits the possibility of using non-linear amplifiers and reducing power consumption. This is the most important characteristic when the system is based on portable equipment, such as laptops. Finally, extensive experimental results are presented, and BER measurements of this prototype are also given.
URI: http://hdl.handle.net/10553/46879
Source: IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC,v. 3, p. 973-976
Appears in Collections:Actas de congresos
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