初期位相のランダム化によるCPM-OFDMシステムのPAPR低減効果の評価

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2014/08/01

タイトル(英語): A PAPR Reduction Method for CPM-OFDM Systems using Initial Phase Randomization

著者名: 森岡　和行（信州大学 ／電子航法研究所），アサノ　デービッド（信州大学 ）

著者名(英語): Kazuyuki Morioka (Shinshu University/Electronic Navigation Research Institute), David Asano (Shinshu University)

キーワード: 位相連続変調(CPM)，直交周波数分割多重(OFDM)，ピーク対平均電力比(PAPR)　　Continuous phase modulation，Orthogonal frequency division multiplexing，Peak to average power ratio

要約(英語): In this paper, CPM-OFDM systems which use CPM (Continuous Phase Modulation) as the first modulation scheme of OFDM (Orthogonal Frequency Division Multiplexing) are considered. As is the case for conventional OFDM systems, PAPR (Peak to Average Power Ratio) reduction is the most important task in CPM-OFDM systems. PAPR reduction by varying the initial phase of each sub-carrier with a fixed offset and a random offset are proposed. In the random offset method, the initial phase of each sub-carrier is not known at the receiver side, so we propose a demodulation algorithm using the phase continuity property of CPM and MLSD (Maximum Likelihood Sequence Detection). Simulation results show that the PAPR performance is improved if we use the random offset method. Also, we found that even though the initial phase is unknown at the receiver, the proposed algorithm can demodulate CPM-OFDM symbols as well as an algorithm where the initial phase is known.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.134 No.8 （2014） 特集：産業界における新たな通信・ネットワーク技術の活用

本誌掲載ページ: 1010-1015 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/134/8/134_1010/_article/-char/ja/