Title :
Information rates of optical impulse modulation over indoor diffuse wireless channels
Author :
Mohamed, Mohamed D A ; Hranilovic, Steve
Author_Institution :
Dept. Electr. & Comput. Eng., McMaster Univ., Hamilton, ON
Abstract :
Optical impulse modulation (OIM) is a recent wireless optical modulation scheme that achieves high data rates by utilizing high-frequency bands to satisfy the channel non-negativity constraint. These bands are attenuated by the lowpass indoor diffuse optical wireless channel, and hence are not detected by the receiver. For a uniform binary input distribution, the information rates are investigated for OIM and compared to those of a conventional rectangular on-off keying (Rect-OOK) scheme. Using a well-known exponential model for the indoor diffuse optical channel, at a normalized delay spread of 0.3 and optical signal-to-noise ratio (SNR) of 3 dBo, the information rate of OIM with a simple lowpass receiver is shown to be 8.6% higher than that of Rect-OOK with a more complex whitened matched filter receiver.
Keywords :
indoor radio; modulation; wireless channels; Rect-OOK; channel nonnegativity constraint; indoor diffuse optical wireless channel; information rates; optical impulse modulation; optical signal-to-noise ratio; wireless optical modulation scheme; Bandwidth; Delay; Information rates; Optical attenuators; Optical feedback; Optical filters; Optical modulation; Optical noise; Optical receivers; Pulse modulation;
Conference_Titel :
Communications, 2008 24th Biennial Symposium on
Conference_Location :
Kingston, ON
Print_ISBN :
978-1-4244-1945-6
Electronic_ISBN :
978-1-4244-1946-3
DOI :
10.1109/BSC.2008.4563237