By Topic

On merits of spatial coding in multilevel optical wireless links

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Alqudah, Y.A. ; Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA ; Kavehrad, M.

Spatial confinement of the paths traveled by infrared signals enables reuse of bandwidth and resources in adjacent indoor environments. This property can also result in undesirable shadowing that occurs whenever an obstacle blocks signal paths between transceivers. Shadowing compromises link reliability by increasing the error rate, and can result in service interruption. We propose spatial coding to improve link performance and alleviate the shadowing effect in multi spot diffusing, a multi-input, multi-output architecture. Spatial coding performance is compared to receiver multi-level combining. Our results show that when a channel is shadowed, 4-level combining at the receiver fails to maintain a reliable link irrespective of transmitted power. Using spatial coding over 6 channels, a reliable link is possible in the presence of a shadowed channel with an optical power penalty of 4.5 dB.

Published in:

Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE  (Volume:7 )

Date of Conference:

1-5 Dec. 2003