A Software-Defined Radio Based Cognitive Radio Demonstration Over FM Band
Document Type
Article
Publication Date
6-21-2009
Identifier/URL
41212630 (Pure)
Abstract
The resource allocation optimization for multicast service in orthogonal frequency division multiple access (OFDMA) systems is an important research topic. It is known that in traditional multicast schemes the rate in each multicast group is severely limited by the user who has the minimum channel gain (MCG) on each subchannel. To counteract this effect, in this paper, we introduce the multiple description coding (MDC) into the multiple-group multicast service optimization for the downlink OFDMA, and study the weighted sum rate (WSR) maximization methods under various system constraints and assuming discrete-rate modulation. Simulation results show that the proposed method provides a significant performance enhancement than the MCG scheme and an MDC-based near-optimal iterative bit loading (IBL) approach. Besides this, our method converges very fast and enjoys a low complexity that is linear in the numbers of users, subchannels, and modulation bit levels.
Repository Citation
Mian, O.,
Zhou, R.,
Li, X.,
Hong, S.,
& Wu, Z.
(2009). A Software-Defined Radio Based Cognitive Radio Demonstration Over FM Band. Proceedings of the 2009 ACM International Wireless Communications and Mobile Computing Conference, IWCMC 2009, 495-499.
https://corescholar.libraries.wright.edu/ee/128
DOI
10.1145/1582379.1582487
