PHASE SYNCHRONIZATION BETWEEN TWO PHASE LOCKED LOOPS

    公开(公告)号:US20180375519A1

    公开(公告)日:2018-12-27

    申请号:US15634183

    申请日:2017-06-27

    Abstract: Systems, methods, and circuitries for synchronizing a first phase locked loop (PLL) with a second PLL are provided. In one example a PLL system includes a first PLL configured to generate a first signal; a second PLL configured to generate a second signal; and phase calculation circuitry. The phase calculation circuitry is configured to calculate a phase of the first signal at a given time; and provide the calculated phase to the second PLL for use by the second PLL in synchronizing a phase of the second with the phase of the first signal.

    COMMUNICATION DEVICE AND METHOD FOR PERFORMING RADIO COMMUNICATION

    公开(公告)号:US20180331878A1

    公开(公告)日:2018-11-15

    申请号:US15775845

    申请日:2015-12-21

    Abstract: A communication device is provided that includes a modulation circuit configured to modulate a signal comprising a first signal portion of a first data type and a second signal portion of a second data type. The modulation circuit is configured to modulate the first signal portion in accordance with a first modulation scheme and the second signal portion in accordance with a second modulation scheme. At least one of the first data type is different from the second data type or the second modulation scheme is different from the first modulation scheme. The communication device further includes a modification circuit configured to modify the modulated first signal portion based on a first modification scheme and the second signal portion based on a second modification scheme. The communication device further includes a transmitter configured to transmit the modified first signal portion and the modified second signal portion.

    METHODS AND DEVICES FOR SPUR CANCELLATION IN DIGITAL PHASE LOCKED LOOPS

    公开(公告)号:US20170288851A1

    公开(公告)日:2017-10-05

    申请号:US15088388

    申请日:2016-04-01

    CPC classification number: H04L7/0331 H03L7/093 H03L2207/50 H04B15/02

    Abstract: Embodiments related to systems, methods, and computer-readable media to enable a digital phase locked loop are described. In one embodiment, a digital synthesizer comprises a digital phase locked loop with detection circuitry to calculate an estimate of a magnitude and a phase of a spurious response from an error signal within the digital phase locked loop. The digital phase locked loop further comprises generation circuitry to generate an inverse spur based on the estimate of the magnitude and the phase, and further comprises injection circuitry to inject the inverse spur into the digital phase locked loop. In some embodiments, least mean squares (LMS), recursive least squares (RLS), or other such adaptation is used to estimate the magnitude and phase of the spurious response.

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