Optimal blockwise subcarrier allocation policies in single-carrier FDMA uplink systems
نویسندگان
چکیده
منابع مشابه
Optimal blockwise subcarrier allocation policies in single-carrier FDMA uplink systems
In this paper, we analyze the optimal (blockwise) subcarrier allocation schemes in single-carrier frequency division multiple access (SC-FDMA) uplink systems without channel state information at the transmitter side. The presence of the discrete Fourier transform (DFT) in SC-FDMA/orthogonal frequency division multiple access OFDMA systems induces correlation between subcarriers which degrades t...
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In this paper, the resource allocation problem for multi-user SC-FDMA uplink systems with zero forcing equalizers is investigated. By the use of the equal power allocation, the problem of maximizing the total achievable rate with separate power constraints is transformed to the problem of subcarrier allocation to users. In this paper, iterative subcarrier allocation schemes are proposed to impr...
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あらまし 本稿では,シングルキャリア周波数分割多元接続(SC-FDMA)を対象とし,ナッシュ交渉解(NBS)に基 づく周波数割り当てアルゴリズムを提案する.SC-FDMA においてはチャネル状態の良好なユーザへ優先的に周波 数を割り当てることで高いシステムの伝送容量を達成できる.しかし一方で,チャネル状態の悪いユーザへは周波 数が割り当てられず,ユーザ間の公平性が損なわれるという問題がある.このようなトレードオフを解決する手法 として,ゲーム理論の応用が広く検討されており,特に協力ゲーム理論における NBS の利用が有効であることが明 らかにされている.しかし,NBS を求めるには許容できないほどの演算量が必要となる.そこで本稿では,低演算 量でありながら NBS とほぼ同等の特性を達成可能な準 NBS アルゴリズムを提案する.また,周波数領域時空間符 号化送信ダイバーシチ(FD-S...
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The allocation of subcarriers and power to users is an important issue for exploiting the advantages of OFDMA systems. The main objective of the traditional OFDMA uplink resource allocation focuses on two aspects: one is to maximize the transmission rate of each user, the other is to minimize power. In this paper, we proposed the joint subcarrier and power allocation in the uplink of an OFDMA s...
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ژورنال
عنوان ژورنال: EURASIP Journal on Advances in Signal Processing
سال: 2014
ISSN: 1687-6180
DOI: 10.1186/1687-6180-2014-176