In this paper we propose a promising multiantenna scheme specifically suitable for hybrid Code & Time Division Multiplex (CTDM) high speed shared channels commonly employed in 3GPP and 3GPP2 standards (HSDPA/1xEVDO(HDR)/1xEVDV). The scheme is called Phase Sweep Transmit Diversity (PSTD) and was originally proposed for power controlled dedicated voice channels. PSTD is shown to provide the benef...

We experimentally demonstrate control of the rate of spontaneous emission in a tunable hybrid photonic system that consists of two canonical building blocks for spontaneous emission control, an optical antenna and a mirror, each providing a modification of the local density of optical states (LDOS). We couple fluorophores to a plasmonic antenna to create a superemitter with an enhanced decay ra...

Abstract—For future mmWave mobile communication systems the use of analog/hybrid beamforming is envisioned be a key aspect. The synthesis of beams is a key technology of enable the best possible operation during beamsearch, data transmission and MU MIMO operation. The developed method for synthesizing beams is based on previous work in radar technology considering only phase array antennas. Wit...

The increasing demand for high-speed, high-quality mobile communication has fueled interest in spectrumefficient multiple-input multiple-output (MIMO) wireless communication links. Designing, deploying, and evaluating MIMO communication links in realistic environments, however, is challenging due to the sitespecific nature of the propagation channel and the complex electromagnetic interactions ...

Abstract—In this paper, a hybrid multiobjective evolutionary algorithm, MOEA/D-GO (Multiobjective Evolutionary Algorithm Based on Decomposition combined with Enhanced Genetic Operators), is proposed for fragment-type antenna design. It combines the ability and efficiency of MOEA/D to deal with multiobjective optimization problems with the specific character of two-dimensional chromosome coding ...

The input impedance of a large circular loop antenna with arbitrary orientation in a cold magnetoplasma is calculated by using a transmission line theory. New impedance resonances for antennas of finite size in a magnetoplasma in the frequency region below and near the electron cyclotron frequency are indicated theoretically. The resonance peak of the impedance at the lower hybrid resonance fre...

Molecular solids and polymers can form low-symmetry crystal structures that exhibit anisotropic electron and ion mobility in engineered devices or biological systems. The distribution of molecular orientation and disorder then controls the macroscopic material response, yet it is difficult to image with conventional techniques on the nanoscale. We demonstrated a new form of optical nanocrystall...

We consider parabolic PDEs with randomly switching boundary conditions. In order to analyze these random PDEs, we consider more general stochastic hybrid systems and prove convergence to, and properties of, a stationary distribution. Applying these general results to the heat equation with randomly switching boundary conditions, we find explicit formulae for various statistics of the solution a...

あらまし−次世代移動無線通信では超高速パケットアクセスが主流になることが予想され,誤り訂正符号と自動 再送要求を組み合わせたハイブリット自動再送要求(HARQ)技術の採用が不可欠である.マルチキャリア符号分割マ ルチアクセス(MC-CDMA)と HARQ の併用により厳しい周波数選択性フェージング環境下においても優れたスルー プット特性が得られることが知られている.さらなる伝送特性の改善にはアンテナダイバーシチ技術が有効である. 最近,筆者らは,受信アンテナ数は 6 本までであるが,任意の本数の送信アンテナを用いることのできる時空間符 号化送受信ダイバーシチ(STBC-JTRD)を提案した.本論文では STBC-JTRD を用いる MC-CDMA HARQ について述 べ,そのスループット特性を計算機シミュレーションによって明らかにしている.そして,送信アンテナ数を増加 させた時,従...

A combined numerical-experimental iterative procedure, based on the Gauss-Newton algorithm, has been developed for control of magnetic resonance (MR)-guided hyperthermia (HT) applications in a hybrid MR-HT system BSD 2000 3D-MRI. In this MR-HT system, composed of a 3-D HT applicator Sigma-Eye placed inside a tunnel-type MR tomograph Siemens MAGNETOM Symphony (1.5 T), the temperature rise due to...