Capacity Enhancing Subcarrier Allocation in OFDM Systems with Fractional Frequency Reuse

Seung Su HAN
Jongho PARK
Tae-Jin LEE
Hyun Gi AHN
Kyunghun JANG

IEICE TRANSACTIONS on Communications   Vol.E92-B    No.7    pp.2538-2541
Publication Date: 2009/07/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.2538
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
co-channel interference,  fractional frequency reuse,  OFDMA,  subcarrier allocation,  

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Some wireless OFDMA communication systems support the frequency reuse factor of 1. In order to reduce co-channel interference (CCI) caused by neighbor cells, the fractional frequency reuse (FFR) can be employed. A promising frequency partitioning policy and subcarrier allocation for FFR are essential. In this letter, we employ an efficient frequency partitioning mechanism with less interference and propose an efficient subcarrier allocation algorithm to maximize the sum of users capacity under FFR. We show that the proposed algorithm has higher spectral efficiency than the conventional method as well as significantly high system fairness.