• Title, Summary, Keyword: Multi-layer 6 port

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Design and fabrication of PSK carrier recovery circuit using multi-layer coupled line (다층형 결합 선로를 이용한 반송파 복원 회로 설계 제작)

  • Kim, Young-Wan
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.13 no.10
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    • pp.2039-2044
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    • 2009
  • The PSK carrier signal recovery circuit using multi-layer coupled line was analyzed and designed. The fabricated carrier recovery 6 port element with multi-layer coupled line structure gets the simple architecture. It is possible to implement the carrier signal recovery circuit of the same structure with the multi-layer six port phase correlator of the direct receiver front-end. Based on the analysis of RML carrier recovery circuit using the multi-layer coupled line 6-port phase correlator, the multi-layer coupled line carrier signal recovery structure for multi-mode coherent demodulation was proposed. The fabricated multi-layer coupled line carrier signal recovery circuit for quadrature phase shift-keying shows a good carrier signal characteristic with a constant phase and phase error below ${\pm}3o$.

Six-port direct conversion receiver front-end with carrier recovery circuit and phase shifter using multi-layer coupled line (다층형 결합 선로를 이용한 반송파복원기와 위상 변위기를 갖는 6-단자 직접 변환 수신 전처리부)

  • Kim, Young-Wan
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.13 no.11
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    • pp.2267-2272
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    • 2009
  • The six-port direct conversion receiver front-end that is comprised of a carrier recovery and a phase shifter, which gets the same structure with six-port phase correlator using the multi-layer coupled line, was designed and fabricated in this paper. The six-port element that is comprised of the power divider and the hybrid coupler is designed by multi-layer coupled line structure. The multi-coupled structure is utilized as the basic structure in receiver phase correlator, carrier recovery circuit and phase shifter. The receiver front-end with the same multi-layer coupled line structure for the receiver elements shows the simple structure and no difficulty in integration. The fabricated multi-layer coupled six-port receiver front-end re-generates the carrier signal with a constant phase and demodulates the PSK transmission signal.

A Study of the Automatic Berthing System of a Ship Using Artificial Neural Network (인공신경망을 이용한 선박의 자동접안 제어에 관한 연구)

  • Bae, Cheol-Han;Lee, Seung-Keon;Lee, Sang-Eui;Kim, Ju-Han
    • Journal of Navigation and Port Research
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    • v.32 no.8
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    • pp.589-596
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    • 2008
  • In this paper, Artificial Neural Network(ANN) is applied to automatic berthing control for a ship. ANN is suitable for a maneuvering such as ship's berthing, because it can describe non-linearity of the system. Multi-layer perceptron which has more than one hidden layer between input layer and output layer is applied to ANN. Using a back-propagation algorithm with teaching data, we trained ANN to get a minimal error between output value and desired one. For the automatic berthing control of a containership, we introduced low speed maneuvering mathematical models. The berthing control with the structure of 8 input layer units in ANN is compared to 6 input layer units. From the simulation results, the berthing conditions are satisfied, even though the berthing paths are different.

Design of Wide-Band 6-Port Network for Noise Parameter Measurement Using 3-Section Wilkinson Power Divider and Slot-Coupled Directional Coupler (3단 윌킨슨 전력분배기와 Slot-Coupled 방향성 결합기를 활용한 잡음 파라미터 측정용 광대역 6-포트 회로망의 설계)

  • Lee, Dong-Hyun;Lee, Chang-Dae;Lee, Chan-Woo;Yeom, Kyung-Whan
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.28 no.2
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    • pp.85-96
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    • 2017
  • In this paper, a 2~18 GHz wideband 6-port network is designed and fabricated to extend the measurement frequency bandwidth of noise parameter measurement method using 6-port network. In order to design a broadband 6-port network, a wilkinson power divider and a directional coupler with wideband characteristics are designed. The wilkinson power divider is designed as a three-section structure to achieve wideband characteristics. The direction coupler is designed as a three-section structure and slot-coupled structure using multi-layer substrate to obtain wideband characteristics. A wideband 6-port network is designed and fabricated combining the designed power divider and coupler. The measured results of the fabricated 6-port network for the 2~18 GHz band show characteristics applicable to the noise parameter measurement method.

High Speed Triple-port Register File for 32-bit RISC/DSP Processors (32비트 RISC/DSP CPU를 위한 고속 3포트 레지스터 파일의 설계)

  • 고재명;유동렬
    • Proceedings of the IEEK Conference
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    • pp.1165-1168
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    • 1998
  • This paper describes a 72-word by 32-bit 2-read/1-write multi-port register file, which is suitable for 32-bit RISC/DSP microprocessors. To minimize area and achieve high speed, advanced single-ended sense amplifiers are used. Each part of circuit is optimized at transistor level. The verification of functionality and timing is performed using HSPICE simulations. After modeling and validating the circuit at transistor level, it was laid out in a 0.6um 1-poly 3-metal layer CMOS technology. The simulation results show maximum operating frequency is 179MHz in worst case conditions. It contains 27,326 transistors and the size is 3.02mm by 2.20mm.

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A Study on the Structure Style of Street Green Spaces on Port Island, Kobe, Japan (일본 고베시(神戶市) 포트아일랜드 가로녹지 구조 유형 연구)

  • Kwak, Jeong-In;Han, Bong-Ho;Noh, Tai-Hwan;Kwak, Nam-Hyun
    • Journal of the Korean Institute of Landscape Architecture
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    • v.43 no.4
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    • pp.62-74
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    • 2015
  • This study was carried out to provide examples of planting methods for the construction of street green spaces with abundant greenery by analyzing road type, surrounding land use and planting structures in street green spaces on Port Island, Kobe, Japan. Port Island_(total area: 826ha) is a marine cultural city located in Japan's first artificial island with facilities of urban function and port facilities. The study site was designated at 11 plots of $55{\sim}285m^2$ on Port Island, and topography structure styles were divided into four types with mounding style, slope style, slope and flat style, flat style according to the adjacent roads width. The area adjacent to the middle roads with high levels of noise and pollution set up the mounding style, slope style, slope and flat style of multi-layer structures using topographic properties. The area adjacent to small roads focused on a green strip with shrubs on a flat style. Surrounding land-uses include a public institution, housing complex, and a commercial building. The planting concept was a buffer and landspace function in case of the middle road_(lane 4) while the small road_(lane 2) was a landspace function. Planting species were diverse with Liquidambe formosana, Cinnamomum camphora, Sapium sebiferum, Cedrela sinensis, Laeocarpus sylvestris var. ellipticus, Ginkgo biloba, Prunus serrulata var. spontanea, Zelkova serrata, Quercus glauca, Juniperus chinensis, Magnolia kobus, Rhododendron spp., Camellia japonica, Abelia mosanensis, etc. Planting density was 0.02~0.08(0.04) individual/$m^2$ at the canopy layer, 0.02~0.08(0.04) individual/$m^2$ at the understory layer. Ratio of green coverage was 40.0~173.7(93.0)% at the canopy layer, 2.1~79.8(34.9)% at the understory layer and 17.9~64.2(32.9)% at the shrub layer. $Gr{\ddot{u}}volumenzahl$ was $1.43{\sim}6.67(4.13)m^3/m^2$ at the canopy layer, $0.02{\sim}2.01(0.85)m^3/m^2$ at the understory layer and $0.14{\sim}0.58(0.26)m^3/m^2$ at the shrub layer. The ratio of green coverage of street green space on Port Island was higher than that of Seoul, and particularly, the ratio of green coverage and $gr{\ddot{u}}volumenzahl$ at the shrub layer differed, compared to the main street green space in Korea. The result of this study may be applicable to other coastal reclaimed cities in terms of setting methods for street greenery considering the topography structure, planting structure and planting function.

An Energy Consumption Model using Hierarchical Unequal Clustering Method (계층적 불균형 클러스터링 기법을 이용한 에너지 소비 모델)

  • Kim, Jin-Su;Shin, Seung-Soo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.12 no.6
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    • pp.2815-2822
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    • 2011
  • Clustering method in wireless sensor networks is the technique that forms the cluster to aggregate the data and transmit them at the same time that they can use the energy efficiently. In this paper, I propose the hierarchical unequal clustering method using cluster group model. This divides the entire network into two layers. The data aggregated from layer 2 consisted of cluster group is sent to layer 1, after re-aggregation the total data is sent to base station. This method decreases whole energy consumption by using cluster group model with multi-hop communication architecture. Hot spot problem can be solved by establishing unequal cluster. I also show that proposed hierarchical unequal clustering method is better than previous clustering method at the point of network energy efficiency.

Neural Network-Based Modeling for Fuel Consumption Prediction of Vehicle (차량 연료 소모량 예측을 위한 신경회로망 기반 모델링)

  • Lee, Min-Goo;Jung, Kyung-Kwon;Yi, Sang-Hoi
    • 전자공학회논문지 IE
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    • v.48 no.2
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    • pp.19-25
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    • 2011
  • This paper presented neural network modeling method using vehicle data to predict fuel consumption. To acquire data for training and testing the proposed neural network, medium-class gasoline vehicle drove at downtown and parameters measured include speed, engine rpm, throttle position sensor (TPS), and mass air flow (MAF) as input data, and fuel consumption as target data from OBD-II port. Multi layer perception network was used for nonlinear mapping between the input and the output data. It was observed that the neural network model can predict the vehicle quite well with mean squared error was $1.306{\times}10^{-6}$ for the fuel consumption.

4-Branch Waveguide Thermo-Optic Switch With Unequal Width Heaters (크기가 다른 전극폭을 갖는 4분기 광도파로형 열광학스위치)

  • Song, Hyun-Chae;Rhee Tae-Hyung;Shin, Sang-Yung
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.37 no.6
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    • pp.57-63
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    • 2000
  • A multi-branch thermo-optic switch has a problem that driving powers in the switching states are different from each other; the power consumption for the inner output port is more than twice as large as that form the outer output port. In this pater, to solve this problem unequal width heaters and the waveguide structure with a thin overcladding layer are proposed in a four-branch thermo-optic switch. The proposed structure is fabricated with the polymer materials with high index difference, Teflon and polyimides. The fabricated device was measured at the wavelength of 1550 nm. The measured characteristics exhibit the smaller difference in the power consumption between the switching states and the driving power les than the previous four-branch thermo-optic switch with equal width heaters. As for the device performance, the crosstalk is better than - 16 dB at about 310 ~ 390 mW, the insertion loss is 4.7 dB, and the switching time is less than 1 ms.

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Design of The Bluetooth Negative Resistor Oscillator using the Improved Spiral Inductor (향상된 나선형 인덕터를 이용한 블루투스 부성저항발진기 설계)

  • 손주호;최석우;김동용
    • Journal of Korea Multimedia Society
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    • v.6 no.2
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    • pp.325-331
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    • 2003
  • In this paper, we designed a spiral inductor and voltage controlled oscillator with the negative resistor for the bluetooth receiver by using 0.25$\mu\textrm{m}$ 1-poly 5-metal CMOS n-well process. The proposed inductor, which applies multi layer metal structure, is a structure that decreases resistance value by increasing he metal thickness. As the resistance value decreases, the quality factor Q has improved. Also, voltage-controlled oscillator is designed applying 1 port negative resistance, and changes its oscillating frequency by varying outside capacitor values. The simulation results show that oscillating frequency is 2.33~2.58GHz changing from 2pF to 14pF, and the oscillator has oscillating power over 0dBm.

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