Title :
Efficient Wireless Channel Quality Feedback Schemes Using Optimization Techniques
Author_Institution :
Network Adv. Technol., Motorola
Abstract :
In this paper we propose different channel quality indication (CQI) feedback schemes for orthogonal frequency division multiple access (OFDMA) based future wireless broad-band systems. CQI information considered is the signal to noise ratio (SNR) values of the individual frequency subbands. The feedback schemes are based on linear regression methods that fit a quadratic polynomial to the SNR feedback values in an efficient manner. The Best-M feedback reporting method and the Max SNR scheduler are employed in the system used to evaluate the performance of the schemes. The simulations show that considerable gain in uplink throughput is obtained due to the less feedback bits requirement of the proposed schemes, especially for the future broadband networks that are designed to support a large number of users.
Keywords :
broadband networks; feedback; frequency division multiple access; optimisation; polynomials; radio networks; regression analysis; scheduling; wireless channels; SNR; best-M feedback reporting method; linear regression methods; optimization techniques; orthogonal frequency division multiple access; quadratic polynomial; quality feedback schemes; signal to noise ratio; uplink throughput; wireless broadband systems; wireless channel; Broadband communication; Computer networks; Feedback; Frequency conversion; Linear regression; Polynomials; Signal to noise ratio; Telecommunication network reliability; Throughput; Web and internet services;
Conference_Titel :
Advance Computing Conference, 2009. IACC 2009. IEEE International
Conference_Location :
Patiala
Print_ISBN :
978-1-4244-2927-1
Electronic_ISBN :
978-1-4244-2928-8
DOI :
10.1109/IADCC.2009.4809147
