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IEICE TRANSACTIONS on Fundamentals

An Optimal Power Allocation Scheme for Device-to-Device Communications in a Cellular OFDM System

Gil-Mo KANG, Cheolsoo PARK, Oh-Soon SHIN

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Summary :

We propose an optimal power allocation scheme that maximizes the transmission rate of device-to-device (D2D) communications underlaying a cellular system based on orthogonal frequency division multiplexing (OFDM). The proposed algorithm first calculates the maximum allowed transmission power of a D2D transmitter to restrict the interference caused to a cellular link that share the same OFDM subchannels with the D2D link. Then, with a constraint on the maximum transmit power, an optimization of water-filling type is performed to find the optimal transmit power allocation across subchannels and within each subchannel. The performance of the proposed power allocation scheme is evaluated in terms of the average achievable rate of the D2D link.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E103-A No.12 pp.1670-1673
Publication Date
2020/12/01
Publicized
2020/06/02
Online ISSN
1745-1337
DOI
10.1587/transfun.2020EAL2014
Type of Manuscript
LETTER
Category
Communication Theory and Signals

Authors

Gil-Mo KANG
  Soongsil University
Cheolsoo PARK
  Kwangwoon University
Oh-Soon SHIN
  Soongsil University

Keyword