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 76
- Downloads 0
Selective on-demand protocol for finding reliable nodes to form stable paths in ADHOC networks
A wireless adhoc network consists of a group of wireless nodes which can dynamically self-organize themselves into a temporary topology to form a network without using any existing infrastructure. Generally adhoc...
VLSI Implementation of Pipelined Fast Fourier Transform
Digital Signal Processing (DSP) has become a very important and dynamic research area. Now a day’s many integrated circuits dedicated to DSP functions. Unfortunately Existing designs are restricted to a low accur...
E-Commerce Applications: Vulnerabilities, Attacks and Countermeasures
The extensive use of e-commerce creates new ways for both image and brands to be attacked. Attackers using various gimmicks and techniques to find various loopholes in the system. While there has been good ways to id...
Model for Intrusion Detection System with Data Mining
Today internet has become very popular medium to communicate between users publicly, due to this, lots of intruder has spread across the internet that perform malicious activity and attack to destroy useful informa...
Cryptography Using Quantum Key Distribution in Wireless Networks
Despite years of intensive research, the main deterrents of widely deploying secure communication between wireless nodes remains the cumbersome key setup process. In this paper, we address this problem and we introd...