MIMO Smart Antenna Technology with High Reliability in OFDM Wireless Communications

OFDM无线通信中高可靠性的MIMO智能天线技术

• 批准号: 16560332
• 负责人: KIKUMA Nobuyoshi
• 金额: $ 2.37万
• 依托单位: Nagoya Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16560332/
• 关键词: Smart antenna; MMSE adaptive array; OFDM transmission; MIMO; Orthogonal Polarization; DOA estimation; ESPRIT; Cyclostationarity; STBC; アダプティブアレー; MIMO伝送; MUSIC; SCOREアルゴリズム

The OFDM transmission scheme is considered promising as the technology that integrates the wireless communication and the broadcasting in the future. This is because that scheme has excellent characteristics in broadband and anti-multipath propagation. In this research, the antenna system (adaptive array or smart antenna) with high function and high performance in MIMO (Multi-Input/Multi-Output) wireless communications introducing the OFDM transmission scheme have been researched for two years from 2004. Some results are shown as follows.(1) Two-element system has been examined as an adaptive array for the portable terminal. In this case, the mutual coupling between elements is large, so yielding serious influence on the characteristic of the adaptive array. It is clarified that the characteristic of MMSE adaptive array is improved due to the effect of directivity diversity.(2) The technique for synthesizing the optimum directional patterns for the reception and transmission has been d … More iscussed. It uses the recursive DOA estimation algorithms. Moreover, the initial value of the optimization algorithm of guard interval MMSE adaptive array for OFDM has been investigated, and the effective initializing method is proposed.(3) NS (Noise Subspace) Cyclic ESPRIT is proposed which can estimate the DOA of the desired signal only. It is based on cyclostationarity of the transmitted signal. In addition, the improvement of NS Cyclic ESPRIT is carried out with the decrease of the interfering wave residual component.(4) The method to control the interference between signals in MIMO has been examined, which incorporates the cross polarization into the branch of MIMO. It is found that a sufficient effect of the interference rejection is achieved when the cross polarization amplitude ratio of the propagation path is high.In this way, several constituent technologies which are useful for MIMO-OFDM have been discussed, and the important findings are obtained for future MIMO-OFDM systems with high performance Less

OFDM传输方案被认为是未来无线通信和广播相结合的一种很有前途的技术。这是因为该方案在宽带和抗多径传播方面具有良好的特性。本研究从2004年开始，对MIMO(多输入多输出)无线通信中引入了OFDM传输方案的高功能、高性能的天线系统(自适应阵列或智能天线)进行了两年的研究。主要研究结果如下：(1)将二元系统作为便携式终端的自适应阵列进行了研究。在这种情况下，阵元间的互耦很大，严重影响了自适应阵列的性能。研究表明，由于指向性分集的影响，最小均方误差自适应阵列的性能得到了改善。(2)提出了一种用于接收和发送的最佳方向图综合技术--d…更多的是讨论。它使用递归的波达方向估计算法。此外，还研究了保护间隔MMSE自适应阵列优化算法的初值问题，并提出了有效的初始化方法。(3)提出了一种仅能估计期望信号波达方向的NS(Noise Subspace)循环ESPRIT算法。它基于传输信号的循环平稳性。此外，还对NS循环ESPRIT进行了改进，减少了干扰波的残余分量。(4)研究了将交叉极化引入MIMO分支的MIMO信号间干扰控制方法。研究发现，当传播路径的交叉极化幅值比较高时，干扰抑制效果较好。在此基础上，讨论了几种适用于MIMO-ofdm系统的组成技术，得到了对未来高性能低性能MIMO-ofdm系统有重要参考价值的结论。

项目成果

グレーティングローブ抑圧により高効率化された狭壁スロット中空導波管ミリ波平面アンテナ

栅瓣抑制带来高效率的窄壁缝隙空心波导毫米波平面天线

• 发表时间: 2005
• 期刊: 電子情報通信学会技術研究報告 105・188
• 作者: 山口和彦;栗原吉広;ブライアンクルカスキー;小林欣吾;Kazuhiko YAMAGUCHI;K.Baba;柿沼悠;K.Baba;K.Baba;Satoshi Hori;Yusuke Morikawa;Yoshifumi owa;稲垣好之;稲垣好之;水谷玲義
• 通讯作者: 水谷玲義

A Consideration on Quasi-Orthogonal MIMO-STBC Transmission System Using Orthogonal Polarized Waves

基于正交极化波的准正交MIMO-STBC传输系统的思考

• 发表时间: 2005
• 期刊: Technical Report of IEICE Vol.105, No.188, AP2005-57
• 作者: Kouhei Toshima;Nobuyoshi Kikuma;Hiroshi Hirayama;Kunio Sakakibara
• 通讯作者: Kunio Sakakibara

マルチパス環境下のOFDM伝送方式における同期のとれた到来波の方向推定

多径环境下OFDM传输系统到达波同步方向估计

• 发表时间: 2004
• 期刊: 電子情報通信学会論文誌 J87-B・9
• 作者: Kouhei Toshima;Nobuyoshi Kikuma;Hiroshi Hirayama;Kunio Sakakibara;Ayib Rosdi Zainun;Yoshiyuki Inagaki;Hiroko Ishikawa;Yusuke Deguchi;Yuta Yamamoto;Kunio Sakakibara;菊間信良;水向 渉;堀 智
• 通讯作者: 堀 智

On Improving Cyclic ESPRIT for Signal-Selective DOA Estimation

改进信号选择性 DOA 估计的循环 ESPRIT

• 发表时间: 2004
• 期刊: Proceedings of 2004 International Symposium on Antennas and Propagation (ISAP'04) (CD-ROM)
• 作者: Yoshiyuki Inagaki;Nobuyoshi Kikuma;Kunio Sakakibara;Hiroshi Hirayama
• 通讯作者: Hiroshi Hirayama

OFDM用ガード区間MMSEアダプティブアレーにおける最適化アルゴリズムの初期値に関する検討

OFDM保护间隔MMSE自适应阵列优化算法初值研究

• 发表时间: 2005
• 期刊: 電子情報通信学会論文誌 J88-B・9
• 作者: Hyunho Kang;Brian Kurkoski;Kazuhiko Yamaguchi;Kingo Kobayashi;堀 智
• 通讯作者: 堀 智