Analog-to-digital converter system, transceiver, base station and mobile device

    公开(公告)号:US11528182B2

    公开(公告)日:2022-12-13

    申请号:US17351288

    申请日:2021-06-18

    Abstract: An Analog-to-Digital Converter, ADC, system is provided. The ADC system comprises a plurality of ADC circuits and a first input for receiving a transmit signal of a transceiver. One ADC circuit of the plurality of ADC circuits is coupled to the first input and configured to provide first digital data based on the transmit signal. The ADC system further comprises a second input for receiving a receive signal of the transceiver. The other ADC circuits of the plurality of ADC circuits are coupled to the second input, wherein the other ADC circuits of the plurality of ADC circuits are time-interleaved and configured to provide second digital data based on the receive signal. Additionally, the ADC system comprises a first output configured to output digital feedback data based on the first digital data, and a second output configured to output digital receive data based on the second digital data.

    Apparatus and method for analog-to-digital conversion

    公开(公告)号:US11038516B1

    公开(公告)日:2021-06-15

    申请号:US16886817

    申请日:2020-05-29

    Abstract: An apparatus and method for analog-to-digital conversion. The apparatus includes a first analog-to-digital converter (ADC), a second ADC, and a calibration unit. The first ADC is configured to sample an input analog signal at a first sampling frequency. The second ADC is configured to sample the input analog signal at a second sampling frequency. The second sampling frequency is a fraction of the first sampling frequency. The calibration unit is configured to correct a distortion incurred in an output of the first ADC based on an output of the second ADC. The first ADC may be a time-interleaved ADC. The second ADC may be an extra sub-ADC of the time-interleaved ADC. The second ADC may be configured to sample the input analog signal at random sampling phases. A dithering noise may be added to the input analog signal of the second ADC. The calibration unit may be a non-linear equalizer.

    DIGITAL PREDISTORTION FOR DUAL-BAND POWER AMPLIFIERS
    39.
    发明申请
    DIGITAL PREDISTORTION FOR DUAL-BAND POWER AMPLIFIERS 有权
    双频功率放大器的数字预测

    公开(公告)号:US20160308577A1

    公开(公告)日:2016-10-20

    申请号:US15191583

    申请日:2016-06-24

    Abstract: A signal processing circuit arrangement may include a preamplifier circuit configured to map a first dimension input and a second dimension input to a first subset of a plurality of lookup table coefficients of a two-dimensional (2D) lookup table, wherein the first dimension input and the second dimension input each represent a signal level of one or more input signals, extrapolate from the first subset of the plurality of lookup table coefficients to generate a lookup table output, and apply the lookup table output to the one or more input signals to generate a predistorted input signal for an amplifier.

    Abstract translation: 信号处理电路装置可以包括前置放大器电路,其被配置为将第一维输入和第二维输入映射到二维(2D)查找表的多个查找表系数的第一子集,其中第一维输入和 所述第二尺寸输入各自表示一个或多个输入信号的信号电平,从所述多个查找表系数的所述第一子集外推,以产生查找表输出,并将所述查找表输出应用于所述一个或多个输入信号以产生 用于放大器的预失真输入信号。

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