Coding Limits for Short Rangewireless Infrared Transmission
Konferenz: PIMRC 2005 - 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications
11.09.2005 - 14.09.2005 in Berlin, Germany
Tagungsband: PIMRC 2005
Seiten: 6Sprache: EnglischTyp: PDFPersönliche VDE-Mitglieder erhalten auf diesen Artikel 10% Rabatt
Wolf, Mike; Haardt, Martin (Ilmenau University of Technology, Communications Research Laboratory, PO Box 10 05 65, 98684 Ilmenau, Germany)
Wireless infrared is an attractive alternative for short-range indoor communications. However, mainly as a result of the physical properties of the detector, one serious problem is the power efficiency of the transmission. Under the assumptions of a fixed average optical power and additive white Gaussian noise, we derive the maximum coding gains attainable with optimized On-Off Keying, where "optimized" refers to the probability of the logical "1" pulses in the transmitted data stream. Uncoded On-Off Keying acts as the reference scheme. We also consider orthogonal pulse-position modulation, having favorable spectral characteristics, with and without additional coding and compare the corresponding coding gains with the limits for binary transmission.