VLSI design of an interference canceller for QPSK OFDM-IDMA systems

With growing demand of machine to machine (M2M) communication, wireless communication systems request simultaneous connections for many terminals to cope with thus increasing communication throughput. We focus on interleave division multiple access (EDMA) that has superior user detection performance and describe a VLSI design of an interference canceller that performs user detection in QPSK OFDM-IDMA systems. A conventional interference canceller has an issue of degradation in interleave memory throughput. We propose a new architecture of dual-frame processing in an interference canceller by making use of an OFDM-DDMA frame structure. In FPGA implementation, the proposed architecture has shown fewer hardware resources compared with the conventional architecture.conference pape

亀岡カーボンマイナス・プロジェクトの取り組みと成果

departmental bulletin pape

<地域研究>横浜創造都市づくりにおける地域交流型イベントの可能性について 関内外OPEN！について考察

departmental bulletin pape

STRONG ANTIBODY REACTION AGAINST GLYCOSPHINGOLIPIDS INJECTED IN LIPOSOMEEMBEDDED FORMS IN β3GN-T5 KNOCKOUT MICE

2011-08It is known that mutant mice of the β-1,3-N-acetylglucosaminyltransferase gene (β3Gn-T5) respond well to T-cell dependent and independent antigens. Here, we examined the effectiveness of anti-ganglioside antibody generation by immunization of β3Gn-T5 mutant mice with liposome-embedded glycosphingolipids such as GD1a and GT1b. Consequently, the mutant mice showed a more efficient generation of anti-GD1a or anti-GT1b antibodies than wild-type mice in an enzyme-linked immunosorbent assay using sera during immunization. Thus, the β3Gn-T5 deficient mutant mice proved more responsive than wild-type mice to not only protein antigens, but also to carbohydrates in glycolipids. Furthermore, about 50% of monoclonal antibodies generated using splenocytes of the immunized mutant mice were of the IgG class. Besides general high responsiveness to proteins and glycolipids, it could be expected that the mutant mice of β3Gn-T5 would be useful in the generation of monoclonal antibodies towards lacto-/neolacto-series glycolipids, since these mutants lack lacto-/neolacto-series glycolipids. In fact, they showed a good serum response in immuno-fluorescence assay with cultured living cells when immunized by glycolipids extracted from ovarian cancer cell lines. These results suggested that β3Gn-T5 mutant mice are useful for the generation of anti-glycolipid antigens with lacto-/neolacto-core structures expressed in cancer cells.departmental bulletin pape

複数給電型パラサイトアレーを用いた適応指向性制御方式(無線システム,<特集>高速無線通信を支えるアンテナ・伝搬技術論文)

適応指向性制御を行うDBFアレーはRF回路を複数系統備える必要がある.そのため回路規模や消費電力などが増大するという問題がある.この問題を解決するために,素子の一部をハードウェア構成の容易な素子とした複数給電型パラサイトアレーアンテナを使った適応指向性を行うことを提案する.MuPARアンテナは複数の給電素子とハードウェア構成の容易な可変リアクタを装荷したパラサイト素子から構成されるアンテナである.したがって同型のDBFアレーと比べてRF回路やA-D変換器の少ない構造のため小形化・低消費電力化することができる.一般のDBFアレーは重み制御のみで適応指向性制御可能であるが,MuPARアンテナではパラサイト素子によるアナログ制御も必要なため,適応指向性制御はディジタル制御とアナログ制御の組合せとなる.本研究では,パラサイト素子におけるリアクタンス値の最適化には最急こう配法を,給電素子における最適化にはRLSアルゴリズムをそれぞれ適用した場合の適応指向性制御能力について検討する.journal articl