23.
    发明专利
    未知

    公开(公告)号:DE602005019095D1

    公开(公告)日:2010-03-11

    申请号:DE602005019095

    申请日:2005-11-29

    Applicant: QUALCOMM INC

    Abstract: An elliptic dipole antenna, comprising: a poise and counterpoise each having an elliptical shape; and a substrate supporting the poise and counterpoise, the substrate having a closed three-dimensional shape.

    COMBINED DIGITAL-TO-ANALOG CONVERTER AND SIGNAL FILTER

    公开(公告)号:CA2523119A1

    公开(公告)日:2004-11-11

    申请号:CA2523119

    申请日:2004-04-23

    Applicant: QUALCOMM INC

    Abstract: An electronic circuit for processing a digital signal may include a pluralit y of digital delay circuits, each configured to produce a delayed replica of t he digital signal; a plurality of digital-to-analog converters, each configured to convert the digital signal or the delayed replica from one of the delay circuits into an analog signal; a plurality of analog gain circuits, each configured to adjust the analog signal from one of the digital-to-analog converters by a gain factor and each having an output; and an analog summer configured to sum the outputs of the analog gain circuits. The number of del ay circuits and the magnitude of the delays and gains may be selected to cause the circuit to function as a band pass filter, a high pass filter, a low-pas s filter, a notch filter, or any other type of filter. The circuit may be used in a broad variety of applications, including a transceiver (such as a subscriber station) and in ultra wideband applications.

    Over the air acquisition of radio frequency impairment information

    公开(公告)号:AU2017281246B2

    公开(公告)日:2020-06-25

    申请号:AU2017281246

    申请日:2017-05-19

    Applicant: QUALCOMM INC

    Abstract: Systems and methods for providing indications about the TX RF non-linear impairments are disclosed. In accordance with some implementations, a first device (UE or base station) estimates EVM indications for the signal and determines if the EVM indications is above a threshold. The first device may transmit the estimated TX non-linearity indications such as AM-AM, AM-PM, Volterra coefficients, and/or other performance metrics to a second device, that transmitted the signal, when it is determined that the EVM indications is above the threshold. Systems and methods for wireless communication impairment correction are also disclosed wherein, in accordance with some implementations, a first device receives estimated TX non-linearity indications such as AM-AM, AM-PM, and/or Volterra coefficients from a second device and performs non-linear correction of a transmit signal for the second receiver device based at least in part on the EVM indications. Other aspects, embodiments, and features are also claimed and described.

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