By Topic

Capacity of broadcast channels in the near-future CATV architecture

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)
Foschini, G.J. ; Crawford Hill Lab., AT&T Bell Labs., Holmdel, NJ, USA ; Habbab, I.M.I.

Reports fundamental information theoretic results for near-future CATV downstream digital distribution networks. The CATV industry is evolving to this network architecture to quickly replace plant that would otherwise be left with serious reliability problems owing to deployment of cascades of electronic amplifiers. This new architecture is composed of a passive fiber trunk feeding COAX branches altogether serving about 200 homes. Frequency-division-multiplexed digital signals subcarrier intensity modulate a laser illuminating a single-mode fiber. Only one (electronic) amplifier is used and it is located at the COAX feed. Aside from additive white Gaussian noise (AWGN) from shot noise exacerbated by the amplifier, a significant impairment is the clipping stemming from the intensity modulation. A dimensionless parameter identified as key to describing channel capacity is I0/(qFB) where I0 (0.01 to 1 mA) is the photocurrent delivered, q is electron charge, F (10 log F=2 to 10 dB) is the electronic amplifier effective noise figure and B (200 MHz to 1 GHz) is the overall system bandwidth. The following are reported: the optimal design of the head end where signals are launched, availability of extraordinarily high capacities, and how a hefty fraction of capacity might be achieved

Published in:

Lightwave Technology, Journal of  (Volume:13 ,  Issue: 3 )