Blind spectrum sensing method and device based on fast fourier transform
    242.
    发明授权
    Blind spectrum sensing method and device based on fast fourier transform 有权
    基于快速傅里叶变换的盲光谱感知方法和装置

    公开(公告)号:US09590828B2

    公开(公告)日:2017-03-07

    申请号:US14892523

    申请日:2013-06-20

    Abstract: A blind spectrum sensing method and device based on fast Fourier transform. The method comprises: the spectrum sensing device receives a signal on an authorized spectrum band, calculates an autocorrelation coefficient of the received signal after sampling and filtering same, then performs a fast Fourier transform of the autocorrelation coefficient, acquires the modulus of the transform result, constructs determination variables on the basis of the modulus, and determine whether or not a signal of an authorized user is present. The method and device have the advantages of low calculation complexity, obviated need for authorization information characteristic, and insensitivity towards noise uncertainty, and are of great performance.

    Abstract translation: 一种基于快速傅立叶变换的盲频谱感知方法和装置。 该方法包括:频谱感知装置在授权频谱带上接收信号,计算采样和滤波后的接收信号的自相关系数,然后执行自相关系数的快速傅立叶变换,获取变换结果的模数, 根据模数构建确定变量,并确定是否存在授权用户的信号。 该方法和装置具有计算复杂度低的优点,不需要授权信息特性,对噪声不确定性不敏感,性能优良。

    High-current N-type silicon-on-insulator lateral insulated-gate bipolar transistor
    243.
    发明授权
    High-current N-type silicon-on-insulator lateral insulated-gate bipolar transistor 有权
    大电流N型绝缘体上半导体绝缘栅双极晶体管

    公开(公告)号:US09159818B2

    公开(公告)日:2015-10-13

    申请号:US14349632

    申请日:2012-10-24

    Abstract: A high-current, N-type silicon-on-insulator lateral insulated-gate bipolar transistor, including: a P-type substrate, a buried-oxide layer disposed on the P-type substrate, an N-type epitaxial layer disposed on the oxide layer, and an N-type buffer trap region. A P-type body region and an N-type central buffer trap region are disposed inside the N-type epitaxial layer; a P-type drain region is disposed in the buffer trap region; N-type source regions and a P-type body contact region are disposed in the P-type body region; an N-type base region and a P-type emitter region are disposed in the buffer trap region; gate and field oxide layers are disposed on the N-type epitaxial layer; polycrystalline silicon gates are disposed on the gate oxide layers; and a passivation layer and metal layers are disposed on the surface of the symmetrical transistor. P-type emitter region output and current density are improved without increasing the area of the transistor.

    Abstract translation: 一种高电流,N型绝缘体上的横向绝缘栅双极晶体管,包括:P型衬底,设置在P型衬底上的掩埋氧化物层,设置在P型衬底上的N型外延层 氧化物层和N型缓冲阱捕获区。 P型体区域和N型中央缓冲区捕获区域设置在N型外延层内部; P型漏极区域设置在缓冲陷阱区域中; N型源极区域和P型体接触区域设置在P型体区域中; N型基极区域和P型发射极区域设置在缓冲陷阱区域中; 栅极和场氧化物层设置在N型外延层上; 多晶硅栅极设置在栅极氧化物层上; 并且钝化层和金属层设置在对称晶体管的表面上。 改善P型发射极区域的输出和电流密度,而不增加晶体管的面积。

    ISOLATION STRUCTURE OF HIGH-VOLTAGE DRIVING CIRCUIT
    244.
    发明申请
    ISOLATION STRUCTURE OF HIGH-VOLTAGE DRIVING CIRCUIT 有权
    高压驱动电路隔离结构

    公开(公告)号:US20140203406A1

    公开(公告)日:2014-07-24

    申请号:US14240287

    申请日:2012-08-14

    Abstract: An isolation structure of a high-voltage driving circuit includes a P-type substrate and a P-type epitaxial layer; a high voltage area, a low voltage area and a high and low voltage junction terminal area are arranged on the P-type epitaxial layer; a first P-type junction isolation area is arranged between the high and low voltage junction terminal area and the low voltage area, and a high-voltage insulated gate field effect tube is arranged between the high voltage area and the low voltage area; two sides of the high-voltage insulated gate field effect tube and an isolation structure between the high-voltage insulated gate field effect tube and a high side area are formed as a second P-type junction isolation area.

    Abstract translation: 高电压驱动电路的隔离结构包括P型衬底和P型外延层; 在P型外延层上布置有高电压区域,低电压区域和高低压端子区域; 在高低压区和低电压区之间设置第一P型结隔离区,高电压区与低压区之间设置高压绝缘栅场效应管; 高压绝缘栅场效应管的两侧和高压绝缘栅场效应管与高边区之间的隔离结构形成为第二P型结隔离区。

    DIRECT CONTROL METHOD AND SYSTEM FOR INTERNAL POTENTIAL OF BRIDGE ARM OF NEW ENERGY GRID-TIED INVERTER

    公开(公告)号:US20250150004A1

    公开(公告)日:2025-05-08

    申请号:US19017286

    申请日:2025-01-10

    Inventor: Huafeng XIAO Xu WU

    Abstract: Disclosed is a direct control method and system for an internal potential of a bridge arm of a new energy grid-tied inverter (GTI), the control method including the following steps. Measured values are obtained by measuring a port voltage and a port current of a GTI, instantaneous active and reactive power values are calculated, and a phase angle and amplitude reference of an internal potential of a bridge arm are obtained to generate reference values thereof. The internal potential of the bridge arm is estimated, and an estimated value used as a feedback signal, after being compared with the reference values, is sent to an internal potential controller to obtain a modulating signal, which is sent to a pulse width modulation (PWM) module, realizing direct control of the internal potential of the bridge arm. In the present disclosure, the dynamic performance of the GTI is improved while improving power quality.

    Automatic generation method for three-dimensional morphology of ruts in asphalt pavements

    公开(公告)号:US12288292B2

    公开(公告)日:2025-04-29

    申请号:US18721198

    申请日:2022-11-24

    Abstract: An automatic generation method for three-dimensional morphology of ruts in asphalt pavements comprises: constructing a standard rut cross-section representation model, classifying ruts, acquiring detection data of a rutted section of an asphalt pavement, selecting different rut cross-sections at equal intervals in a longitudinal direction of the pavement, denoising and smoothening the rut cross-sections, selecting feature points according to geometric fluctuation features of the rut cross-sections, connecting the feature points and fitting a cross-sectional curve based on an evolution law of rut deformation, and fusing multiple reconstructed rut cross-sections to realize automatic generation and visualization of three-dimensional morphology of a rut.

    Multi-degree-of-freedom myoelectric artificial hand control system and method for using same

    公开(公告)号:US12269161B2

    公开(公告)日:2025-04-08

    申请号:US17628753

    申请日:2020-06-03

    Abstract: Provided are a multi-degree-of-freedom myoelectric artificial hand control system and a method for using same. The system comprises a robotic hand, a robotic wrist (2), a stump receiving cavity (1) and a data processor (3), wherein the robotic hand and the stump receiving cavity (1) are respectively mounted on two ends of the robotic wrist (2); a multi-channel myoelectric array electrode oversleeve, a control unit circuit board, and a battery are connected in the stump receiving cavity (1); and the other end of the control unit circuit board is connected to the robotic hand and the robotic wrist (2). The method for using the system comprises the following steps: (S1) a user wearing a multi-channel myoelectric array electrode oversleeve, and connecting a battery and a control unit circuit board; (S2) the user completing a gesture, collecting a surface electromyography signal and then uploading same to a data processor (3); (S3) the data processor (3) receiving the surface electromyography signal and inputting same into a neural network algorithm to generate a gesture prediction model; and (S4) the user controlling the multi-degree-of-freedom movement of the robotic wrist (2) and the robotic hand. By means of the system, continuous gestures and the gesture strength thereof can be identified, and multi-degree-of-freedom gestures can be made.

    SATELLITE COMMUNICATION-ORIENTED GEOMETRY-BASED STOCHASTIC CHANNEL MODELING METHOD

    公开(公告)号:US20250088296A1

    公开(公告)日:2025-03-13

    申请号:US18816739

    申请日:2024-08-27

    Abstract: A satellite communication-oriented geometry-based stochastic channel modeling method includes steps: S1: establishing a satellite channel simulation scenario, and setting scenario layout parameters; S2: initializing the trajectory and speed of a satellite and a receiving end; S3: calculating spatially consistent large-scale parameters, and calculating an effect of rainfall on the large-scale parameters; S4: calculating a path loss, a shadow fading, an atmospheric absorption, and a rainfall attenuation; S5: initializing the central positions of a cluster and a scatterer, and calculating the delay, angle and power of the cluster according to the geometric position information of the transmitting and receiving ends and the scatterer, to generate a channel coefficient; S6: updating the large-scale and small-scale parameters according to the movement of the transmitting and receiving ends and the birth-death process of the cluster, to generate a new channel coefficient; and S7: deriving the statistical characteristics of the channel, and performing simulation analysis.

    OPTIMIZATION MODELING AND ROBUST CONTROL METHOD FOR SOFT ROBOT BASED ON FUSION PREDICTION EQUATION

    公开(公告)号:US20250083311A1

    公开(公告)日:2025-03-13

    申请号:US18827825

    申请日:2024-09-08

    Abstract: Disclosed is an optimization modeling and robust control method for a soft robot based on a fusion prediction equation, including the following steps: deriving measurement coordinates based on the fusion prediction equation; designing an observation function based on the measurement coordinates; identifying a Koopman model based on the observation function; and designing a robust model predictive controller based on the Koopman model. Further disclosed are a fusion prediction equation and a derivation method thereof, which can derive correct, abundant but non-redundant measurement coordinates, overcoming the problem of single measurement coordinates in a soft robot system, thereby being conducive to simplifying a design process of the observation function and further improving the accuracy of the Koopman model for the soft robot.

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