Coding Limits for Short Rangewireless Infrared Transmission
Conference: PIMRC 2005 - 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications
09/11/2005 - 09/14/2005 at Berlin, Germany
Proceedings: PIMRC 2005
Pages: 6Language: englishTyp: PDFPersonal VDE Members are entitled to a 10% discount on this title
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.