Adaptive digital pre-distortion system

    公开(公告)号:US09979422B1

    公开(公告)日:2018-05-22

    申请号:US15380757

    申请日:2016-12-15

    CPC classification number: H04B1/0475 H04B1/10 H04B17/391

    Abstract: An adaptive digital pre-distortion system includes a transmitting module and a receiving module. The transmitting module is configured to receive a first signal and includes a modulator, pre-distortion module, and transmitting circuit. The pre-distortion module is coupled to the modulator to perform a pre-distortion operation in accordance with the first modulation signal and generate a first pre-distortion signal. The transmitting circuit generates a first transmitted signal in accordance with the first pre-distortion signal. The receiving module is configured to receive the first transmitted signal and includes a receiving circuit, demodulator, and prediction module. The prediction module generates a pre-distortion parameter in accordance with a modulation vector error between the second demodulation signal and the first signal and transmits the pre-distortion parameter to the pre-distortion module, wherein the pre-distortion module adjusts the pre-distortion operation of the pre-distortion module in accordance with the pre-distortion parameter.

    Active heat-dissipation system and controlling method thereof

    公开(公告)号:US10729033B1

    公开(公告)日:2020-07-28

    申请号:US16430434

    申请日:2019-06-04

    Abstract: An active heat-dissipation system for a base station of a communication system includes a measuring module, configured to detect a temperature sensing signal of the base station; a controller, configured to receive the temperature sensing signal detected by the measuring module to set a preset temperature signal, to generate a difference between the temperature sensing signal and the preset temperature signal and a time derivative of the difference, and to output a control signal according to the difference and the time derivative of the difference based on a control program; and a power module, configured to receive the control signal and output an electrical signal to a heat-dissipation module according to the control signal, such that the heat-dissipation module performs a heat-dissipation process for the base station according to the electrical signal.

    Digital-controlled vector signal modulator

    公开(公告)号:US10476717B1

    公开(公告)日:2019-11-12

    申请号:US16234484

    申请日:2018-12-27

    Abstract: A vector modulator includes a quadrature component generator, configured to generate an input in-phase signal and an input quadrature signal according to an input radio frequency (RF) signal; a switching circuit, receiving a plurality of bits, comprising a plurality of switches controlled by the plurality of bits, configured to generate an output in-phase signal and an output quadrature signal according to the plurality of bits, where the output in-phase signal and the output quadrature signal are related to input in-phase signal and the input quadrature signal; and a combining module, configured to generate an output RF signal according to the output in-phase signal and the output quadrature signal.

    Signal modulator
    5.
    发明授权

    公开(公告)号:US10284289B1

    公开(公告)日:2019-05-07

    申请号:US15847967

    申请日:2017-12-20

    Abstract: A reflective modulator which comprises a coupler, two diodes and two DC block units. The coupler has an input end used to output an output signal, an output end used to output an output signal, a first load end connected to one of the diodes and a second load end connected to another one of the diodes. The DC block units connect between the diodes and the coupler for DC blocking. A message signal is selectively inputted to both of the two DC block units for operating the state of the two diodes. The two diodes turn on when the message signal is large enough. The two diodes turn off when the message signal is not large enough. The two diodes are implemented by PIN diodes. A BPSK modulator using the reflective modulator and a quadrature modulator using the BPSK modulator is also introduced.

    Variable inductor and integrated circuit using the variable inductor

    公开(公告)号:US10361154B2

    公开(公告)日:2019-07-23

    申请号:US15848026

    申请日:2017-12-20

    Abstract: A variable inductor which comprises a primary conductor, first and second secondary conductors and one or more switch. The primary conductor has a first node and a second node, wherein the first node is used to connect a first external component and the second node is used to connect a second external component. The first and second secondary conductors magnetically couple to the primary conductor. The one or more switch has two sides connected to the first or second secondary conductor, respectively. The first and second secondary conductors are formed a single-loop structure with two or more changeable current paths which are operated by the states of the one or more switch. An integrated circuit using the variable inductor is also introduced.

    Phase controller and phase controlling method for antenna array, and communication apparatus using the same

    公开(公告)号:US10516210B2

    公开(公告)日:2019-12-24

    申请号:US15848186

    申请日:2017-12-20

    Abstract: A phase controller for an antenna array includes a determination circuit, determining a direction index of the antenna array, and calculating a phase index according to the direction index according to a congruence modulo equation; a switching box, selecting L first frequency signals with L different first phases among K first frequency signals with K different first phases according to the phase index, wherein L and K are integer larger than 1, and L is not larger than K; and a frequency synthesizing module, comprising L phase-coherent PLL frequency synthesizers for receiving the L first frequency signals with the L different first phases to generate L second frequency signals with L different second phases to L antennae of the antenna array, wherein a second frequency of the second frequency signals is larger than a first frequency of the first frequency signals.

    Communication structure
    10.
    发明授权

    公开(公告)号:US10177445B1

    公开(公告)日:2019-01-08

    申请号:US15641382

    申请日:2017-07-05

    Abstract: Communication structure for communication with a mobile communication apparatus includes a signal conduction module having an array of antenna units; and a signal transceiving module including a signal transceiving unit, control unit, and power control unit. The control unit generates a driving signal to the power control unit, which generates a voltage to the signal transceiving unit; the signal transceiving unit generates a corresponding spectrum signal, transferred by the signal conduction module. The mobile communication apparatus receives the spectrum signal and transfers a first feedback signal. The first feedback signal, after being received by the signal conduction module, is transferred to the signal transceiving unit, which generates a second feedback signal to the control unit, the control unit identifies the second feedback signal and generates a control signal to the signal conduction module; the array of antenna units is controlled by the control signal correspondingly to enhance communication quality.

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