Modified EESM Link Adaptation Method with Multiple Constellation for Future Wireless Networks
Journal Title: International Journal of Research in Computer and Communication Technology - Year 2013, Vol 2, Issue 7
Abstract
Wireless communication systems require high spectral efficiency and throughput in order to be money-spinning. Link adaptation schemes are known to be the best solution to achieve this aspiration. In customary link adaptation scheme for OFDM, a look-up table is maintained at the system level and best Modulation and Coding Scheme (MCS) is chosen based on the link generalization information from the link level simulator. One of the well known link generalization method is Exponential Effective SNR Mapping (EESM), where the received SNR vectors at the receiver are being abstracted to a single metric, SNReff that represents the link quality. One Channel State Information (CSI) representing the whole group of sub-carriers over a time varying fading channel may lead to be better or worse for few sub-carriers in the group and reduces the Bit Error Rate. Hence multiple feedbacks and multiple constellations may within one group of sub-carriers may improve the performance and utilization of the channel. Modified EESM approach is proposed in the paper with multiple feedbacks and constellations to improve the BER performance. Improvement in the throughput performance and reduction in feedback overhead has been shown as performance metrics.
Authors and Affiliations
Sandanalakshmi R, Kadhiravan D
Keywords
Related Articles
- EP ID EP27593
- DOI -
- Views 321
- Downloads 4
Applications of MVS on Hierarchical Clustering Algorithms
Clustering is a valuable method that arranges a large quantity of unordered text documents into a small number of expressive and coherent clusters, thereby offering a basis for instinctive and informative steering an...
Authentication Token as SSO Devices
Authentication is a process by which a person verifies that someone is who he claims he is. There are many ways of authentication as user login authentication, one-way authentication of communicating entities and two...
A Secured Dynamic Location Monitoring System in WSN
Wireless sensor network is broadly spreading network of the communication field. Wireless sensor network is having sensor nodes as sensing devices which sense physical or environmental conditions and a sink node is t...
A New Hybrid Automated Tarrif System For Grid Conneted Solar Powe Plants
Recently consumption or release of more energy in various forms in both households and industrial, malls, etc are became a big challenge to the researchers. In this work we developed a method to manage such energy in...
Implementation and Analysis of Power-constrained contrast enhancement algorithm using a sub-band decomposed MSRA for OLED display
This paper presents a power-constrained contrast enhancement algorithm for organic light-emitting diode display based on multi-scale retinex Algorithm (MSRA). In general, MSR, which is the key component of the propose...