Dynamic hybrid duplex for rate maximization in OFDMA

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 477
  • Download : 460
Orthogonal frequency division multiple access (OFDMA) is considered as one of the technologies for 4th generation (4G) due to its robustness against multi-path environment. OFDMA also has the advantage of flexibility in resource allocation, which cannot be supported by existing duplex schemes. In this paper, we propose dynamic hybrid duplex (DHD) which will enhance the efficiency and flexibility of the OFDMA system. To establish the framework of resource allocation for the DHD, we formulate DHD resource allocation problem (DRAP) which maximizes the total users' data rate with power, rate, and subcarrier allocation constraints. A heuristic procedure is developed to solve the problem. The procedure finds the best mode and the best amount of resources allocated to downlink (DL) and uplink (UL). Simulation is performed with five scenarios to evaluate the DHD. Its results show that the proposed DHD outperforms other duplex schemes in various environments. Copyright (C) 2010 John Wiley & Sons, Ltd.
Publisher
WILEY-BLACKWELL
Issue Date
2011-10
Language
English
Article Type
Article
Keywords

MULTIUSER OFDM; ALLOCATION; SYSTEMS

Citation

WIRELESS COMMUNICATIONS & MOBILE COMPUTING, v.11, no.10, pp.1423 - 1432

ISSN
1530-8669
DOI
10.1002/wcm.942
URI
http://hdl.handle.net/10203/23431
Appears in Collection
IE-Journal Papers(저널논문)
Files in This Item

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0