Frequency and Subcarrier Reuse Partitioning for FH-OFDMA Cellular Systems
نویسندگان
چکیده
منابع مشابه
Dynamic Fractional Frequency Reuse in OFDMA systems
While OFDMA orthogonalizes users within a cell, out-of-cell interference avoidance is a primary concern in the practical implementation of OFDMA systems. This project explores one of the key ideas towards limiting the harmful effects of out-of-cell interference: fractional frequency reuse (FFR) (1). We first explore the idea of frequency reuse and introduce FFR. Then, we discuss the algorithm f...
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An optimal subcarrier allocation algorithm is proposed for orthogonal frequency division multiple access systems over Rayleigh fading channels with channel state information feedback. The transmitted orthogonal frequency division multiple access frame is divided into groups called subchannels according to the detected number of users at the base station. The pilots are reduced for the stable su...
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Orthogonal frequency division multiple access (OFDMA) is a promising technique for high data rate communications in future cellular systems. Since frequency resources are universally reused in every cell in a system, a typical OFDMA system tries to maximize the spectral efficiency. Users located near the cell-edge tend to have the weakest signal strength. So they might experience severe inter-c...
متن کاملSubcarrier Allocation for a 2-Hop OFDMA Virtual Cellular Network
あらまし 次世代移動無線通信システムの実現に向けて,マルチホップバーチャルセルラネットワーク(VCN) が提案されている.筆者らは,直接拡散符号分割多元接続(DS-CDMA)VCN におけるマルチホップチャネル割当 てについて検討してきた.DS-CDMA では,異なる拡散符号を用いることによって VC 内で同一のチャネルを再利 用できるものの,隣接の無線ポート(WP)から処理利得で低減しきれないほどの大きな干渉を受ける場合がある. そこで,本論文では,VCN に直交周波数分割多元接続(OFDMA)を適用する.OFDMA では異なるサブキャリア を割当てることで隣接 WP からの干渉を避けることが可能である.本論文では,下りリンク2ホップ OFDMA VCN におけるチャネル構成法について検討している.ブロック型,等間隔型及び適応型チャネル構成法を用いたときの シャノンのチャネル容量を...
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Femtocells are expected to be one of the emerging technologies for next generation communication systems. For successful deployment of femtocells in the pre-existing macrocell networks, there are some challenges such as the cell planning for interference management, handoff, and power control. In this paper, we focus on frequency planning which can provide interference avoidance for the co-exis...
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ژورنال
عنوان ژورنال: Journal of Korea Multimedia Society
سال: 2013
ISSN: 1229-7771
DOI: 10.9717/kmms.2013.16.5.601