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Spectrum Refarming: A New Paradigm of Spectrum Sharing for Cellular Networks
- Source :
- GLOBECOM
- Publication Year :
- 2015
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2015.
-
Abstract
- Spectrum refarming (SR) refers to a radio resource management technique which allows different generations of cellular networks to operate in the same radio spectrum. In this paper, an underlay SR model is proposed, in which an Orthogonal Frequency Division Multiple Access (OFDMA) system refarms the spectrum of a Code Division Multiple Access (CDMA) system through intelligently exploiting the interference margin provided by the CDMA system. We investigate the mutual effect of the two systems by evaluating the asymptotic signal-to-interference-plus-noise ratio (SINR) of the users, based on which the interference margin tolerable by the CDMA system is determined. By using the interference margin together with the transmit power constraints, the uplink resource allocation problem of OFDMA system is formulated and solved through dual decomposition method. Simulation results have verified our theoretical analysis, and validated the effectiveness of the proposed resource allocation algorithm and its capability to protect the legacy CDMA users. The proposed SR system requires the least information flow from the CDMA system to the OFDMA system, and importantly, no upgrading of legacy CDMA system is needed; thus it can be deployed by telecom operators to maximize the spectral efficiency of their cellular networks.<br />29 pages, 10 figures, submitted to IEEE Trans. Wireless Comms., accepted conference version to GC'14
- Subjects :
- FOS: Computer and information sciences
Orthogonal frequency-division multiplexing
Computer science
Computer Science - Information Theory
Orthogonal frequency-division multiple access
Throughput
Data_CODINGANDINFORMATIONTHEORY
Direct-sequence spread spectrum
Radio spectrum
Telecommunications link
Computer Science::Networking and Internet Architecture
Electronic engineering
Fading
Electrical and Electronic Engineering
Radio resource management
Underlay
Spectrum sharing
Computer Science::Information Theory
Channel allocation schemes
business.industry
Code division multiple access
Information Theory (cs.IT)
ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS
Co-channel interference
CDMA spectral efficiency
Spectral efficiency
Chip
Transmitter power output
Computer Science::Performance
Cognitive radio
Channel state information
Cellular network
Resource allocation
business
Computer network
Power control
Subjects
Details
- ISSN :
- 00906778
- Volume :
- 63
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Communications
- Accession number :
- edsair.doi.dedup.....59caa0088cf39ad1bf73d418febdbd9d