Mitsubishi Electric

About: Mitsubishi Electric is a company organization based out in Ratingen, Germany. It is known for research contribution in the topics: Signal & Voltage. The organization has 23024 authors who have published 27591 publications receiving 255671 citations. The organization is also known as: Mitsubishi Electric Corporation & Mitsubishi Denki K.K..

Molecular beam epitaxy of CdTe and Hg1-xCdxTe ON GaAs (100)

Abstract: Using the molecular beam epitaxial (MBE) technique, CdTe and Hg1-xCdxTe have been grown on Cr-doped GaAs (100) sub-strates A single effusion cell charged with polycrystal-line CdTe is used for the growth of CdTe films The CdTe films grown at 200 °C with a growth rate of ~ 2 μm/hr show both streaked and “Kikuchi” patterns, indicating single crystalline CdTe films are smoothly grown on the GaAs sub-strates A sharp emission peak is observed at near band-edge (7865 A, 1577 eV) in the photoluminescence spectrum at 77 K For the growth of Hg1-xCdxTe films, separate sources of HgTe, Cd and Te are used Hg06Cd04Te films are grown at 50 °C with a growth rate of 17 μm/hr The surfaces are mirror-smooth and the interfaces between the films and the substrates are very flat and smooth As-grown Hg06Cd04Te films are p-type and converted into n-type by annealing in Hg pressure Carrier concentration and Hall mobility of an annealed Hg06Cd04Te film are 1 × 1017 cm−3 and 1000 cm2/V-sec at 77 K, respectively

Antenna/beam selection training in mimo wireless lans with different sounding frames

Abstract: A method selects antennas in a multiple-input, multiple-output (MIMO) wireless local area network (WLAN) that includes a plurality of stations, and each station includes a set of antennas. Plural consecutive packets, received at a station, include plural consecutive sounding packets. Each sounding packet corresponds to a different subset of the set of antennas, and at least one of the plural consecutive packets includes a high throughput (HT) control field including a signal to initiate antenna selection and a number N indicative of a number of sounding packets which follow the at least one packet including the HT control field and which are to be used for antenna selection. A channel matrix is estimated based on a characteristic of the channel as indicated by the received N sounding packets, and a subset of antennas is selected according to the channel matrix. Station and computer program product embodiments include similar features.

Converter circuit and motor drive control apparatus, air-conditioner, refrigerator, and induction heating cooker provided with the circuit

Abstract: A converter circuit comprises first (3a) and second (3b) step-up converters connected in parallel; the first step-up converter (3a) includes a rectifier (2), a step-up reactor (4a), a switching element (5a), and a reverse current prevention element (6a); the second step-up converter (3b) includes a step-up reactor (4b), a switching element (5b), and a reverse current prevention element (6b); switching control means (7) controlling switching elements (5a) and (5b); and a smoothing capacitor (8) that is provided at the output of the step-up converters (3a) and (3b). The switching control means (7) switches the current mode operation of the converters into a continuous mode and a critical mode based on an input current value compared with a threshold.

Measurement of kinematic and nuclear dependence of R = sigma-L / sigma-t in deep inelastic electron scattering

Abstract: We report results on a precision measurement of the ratio R=σ_L/σ_T in deep inelastic electron-nucleon scattering in the kinematic range 0.2≤x≤0.5 and 1≤Q^2≤10 (GeV/c)^2. Our results show, for the first time, a clear falloff of R with increasing Q^2. Our R results are in agreement with QCD predictions only when corrections for target mass effects and some additional higher twist effects are included. At small x, the data on R favor structure functions with a large gluon contribution. We also report results on the differences R_A-R_D and the cross section ratio σ^A/σ^D between Fe and Au nuclei and the deuteron. Our results for R_A-R_D are consistent with zero for all x, Q^2 indicating that possible contributions to R from nuclear higher twist effects and spin-0 constituents in nuclei are not different from those in nucleons. The ratios σ^A/σ^D from all recent experiments, at all x, Q^2 values, are now in agreement.

Acoustic Doppler sonar for gait recogination

Abstract: A person's gait is a characteristic that might be employed to identify him/her automatically. Conventionally, automatic for gait-based identification of subjects employ video and image processing to characterize gait. In this paper we present an Acoustic Doppler Sensor(ADS) based technique for the characterization of gait. The ADS is very inexpensive sensor that can be built using off-the-shelf components, for under $20 USD at today's prices. We show that remarkably good gait recognition is possible with the ADS sensor.