A low complexity algorithm for proportional resource allocation in OFDMA systems

Orthogonal frequency division multiple access (OFDMA) basestations allow multiple users to transmit simultaneously on different subcarriers during the same symbol period. This paper considers basestation allocation of subcarriers and power to each user to maximize the sum of user data rates, subject...

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Vydáno v:2004 IEEE Workshop on Signal Processing Systems Design and Implementation : proceedings : October 13-15, 2004, Crowne Plaza Hotel, Austin, Texas, USA s. 1 - 6
Hlavní autoři: Wong, I.C., Zukang Shen, Evans, B.L., Andrews, J.G.
Médium: Konferenční příspěvek
Jazyk:angličtina
Vydáno: Piscataway NJ IEEE 2004
Témata:
Access methods and protocols, osi model
Applied sciences
Bit error rate
Exact sciences and technology
Frequency conversion
Intelligent networks
Iterative algorithms
Iterative methods
OFDM modulation
Quadrature amplitude modulation
Resource management
Telecommunications
Telecommunications and information theory
Teleprocessing networks. Isdn
Wireless communication
Wireless LAN
Wireless telecommunication
Resource allocation
Algorithm complexity
Frequency division multiple access
Orthogonal frequency division multiplexing
Algorithm
Adaptive method
Service quality
ISBN:9780780385047, 0780385047
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Shrnutí:Orthogonal frequency division multiple access (OFDMA) basestations allow multiple users to transmit simultaneously on different subcarriers during the same symbol period. This paper considers basestation allocation of subcarriers and power to each user to maximize the sum of user data rates, subject to constraints on total power, bit error rate, and proportionality among user data rates. Previous allocation methods have been iterative nonlinear methods suitable for offline optimization. In the special high subchannel SNR case, an iterative root-finding method has linear-time complexity in the number of users and N log N complexity in the number of subchannels. We propose a non-iterative method that is made possible by our relaxation of strict user rate proportionality constraints. Compared to the root-finding method, the proposed method waives the restriction of high subchannel SNR, has significantly lower complexity, and in simulation, yields higher user data rates.
ISBN:9780780385047
0780385047
DOI:10.1109/SIPS.2004.1363015