AI based Digital Companding Scheme for OFDM system using custom constellation Mapping and selection
Journal Title: International Journal on Computer Science and Engineering - Year 2010, Vol 2, Issue 4
Abstract
Data rate is important in telecommunication because it is irectly proportional to the cost of transmitting the signal. Saving bits is the same as saving money . In this paper we propose new digital companding scheme for OFDM system based on using different constellation orderings (QAM odulator) , depending on the data to be transmitted . Depending on the data to be transmitted AI (Artificial Intelligent) block ompresses and expands the signal, 8 to 3 bit ompression is roposed(32:1 compression). The proposed scheme was simulated in Matlab7.4 and it was shown that the proposed companding scheme effective with low compression error.
Authors and Affiliations
K. Seshadri Sastry , Dr. M. S. Prasad Babu
Keywords
Related Articles
- EP ID EP102716
- DOI -
- Views 102
- Downloads 0
An Implementation in AODV based on Active Route Timeout between sensor nodes in Wireless Sensor Networks
Wireless Sensor Network is a technological development of small, low cost, low power devices that combine data processing with multiple sensing and the ability to communicate wirelessly. Routing in sensor network is a po...
A new approach for improvement of fractal image encoding
In this paper, we propose, in a first part, an approach to reduce the computational complexity of fractal image ncoding by using the Shannon entropy (APENT). A speedup factor of 8 is obtained while image quality is stil...
Comparative Analysis of CBRP, DSR, AODV Routing Protocol in MANET
An ad-hoc network is self-organizing and adaptive. Networks are formed on-the-fly, devices can leave and join the network during its lifetime, devices can be mobile within the network, the network as a whole may be mobil...
EFFICIENT VM LOAD BALANCING ALGORITHM FOR A CLOUD COMPUTING ENVIRONMENT
Cloud computing is a fast growing area in computing research and industry today. With the advancement of the Cloud, there are new possibilities opening up on how applications can be built and how different services can b...
A GENERIC APPROACH TO CONTENT BASED IMAGE RETRIEVAL USING DCT AND CLASSIFICATION TECHNIQUES
With the rapid development of technology, the traditional information etrieval techniques based on keywords are not sufficient, content - based image retrieval (CBIR) has been an active research opic.Content Based Imag...