Title :
The influence of multipath distortion on the transmitted pulse in diffuse indoor infrared channels
Author :
Sato, Akihiro ; Asano, Motoko ; Uehara, Hideyuki ; Sasase, Iwao
Author_Institution :
Dept. of Electr. Eng., Keio Univ., Yokohama, Japan
Abstract :
The main problem of a nondirected diffuse indoor infrared (IR) channel is intersymbol interference (ISI) induced by multipath distortion. In this paper, we examine the influence of multipath distortion on the transmitted pulse in a nondirected diffuse indoor IR channel. We consider five kinds of waveforms as transmitted pulses: pulses of sine curve, squared sine curve, offset-cosine curve, triangle shape, and saw shape. We assume a baseband OOK system with AWGN induced by background light. Non-directed diffuse indoor infrared channel has the low-pass frequency characteristic in nature. It is shown that ISI decreases with the decrease of high frequency components of a transmitted pulse waveform, and that a squared sine pulse yields the best BER performance
Keywords :
Gaussian noise; amplitude shift keying; intersymbol interference; multipath channels; optical communication; optical noise; white noise; AWGN; BER performance; IR channel; ISI; baseband OOK system; diffuse indoor infrared channels; intersymbol interference; low-pass frequency characteristic; multipath distortion; nondirected diffuse indoor infrared channel; offset-cosine curve; saw shape; sine curve; squared sine curve; transmitted pulse; triangle shape; Baseband; Bit error rate; Decision feedback equalizers; Fading; Frequency; Intersymbol interference; Optical distortion; Pulse shaping methods; Shape; Wireless LAN;
Conference_Titel :
Communications, Computers and Signal Processing, 1997. 10 Years PACRIM 1987-1997 - Networking the Pacific Rim. 1997 IEEE Pacific Rim Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-3905-3
DOI :
10.1109/PACRIM.1997.620343
