Signaling Technique for Free Space Optics on the basis of Bit Error Rate
Journal Title: International Journal of Advanced Research in Computer Engineering & Technology(IJARCET) - Year 2012, Vol 1, Issue 4
Abstract
A new efficient method to implement orthogonal frequency division multiplexing (OFDM) on intensity modulated direct detection (IM/DD) channels is presented and termed auto-correlated optical OFDM. It is shown that a necessary and sufficient condition for a band limited periodic signal to be positive for all time is that the frequency coefficients form an autocorrelation sequence. Instead of sending data directly on the subcarriers, the autocorrelation of the complex data sequence is performed before transmission to guarantee non-negativity. In contrast to previous approaches, auto-correlated optical OFDM is able to use the entire bandwidth for data transmission and does not require reserved subcarriers. Using a sub-optimal design technique with 1024 subcarriers, auto-correlated optical OFDM has a better BER than the existing techniques.
Authors and Affiliations
Amrita Chakraborty, , Avinash Gour
Keywords
Related Articles
- EP ID EP130975
- DOI -
- Views 72
- Downloads 0
PIC CONTROLLER BASED PROCESS CONTROL SYSTEM USING GSM
: Devices with microcontroller are widely used in industrial field. We use network interface for connecting more than one device for parallel control. Here we present a design of PIC controller based embedded RS 48...
Detection of Colluding Collision and Identity Delegation Attacks in Wireless Ad Hoc Networks via SADEC
The colluding collision and identity delegation attack comes under the new class of attacks of wireless ad hoc networks namely stealthy attacks that diminish the expense and sight of the invader. The nodes which are...
Improving energy usage efficiency in web enabled smart buildings
— Today, smart building systems are extending beyond a usual phone or computer network, including any imaginable electronics devices forming interconnected networks of physical objects. Various buildings don't have...
Study of Maximum Power Point Tracking Using Perturb and Observe Method
The need for renewable energy sources is on the rise because of the acute energy crisis in the world today. India plans to produce 20 Gigawatts of Solar power by the year 2020, whereas we have only realized less than h...
Survey on Certain Algorithms Computing Best Possible Routes for Transportation Enquiry Services
Shortest Path problems are very common in road network applications where the optimal routings have to be found. As the traffic condition among a city changes from time to time and there are usually a huge amounts...