Transceiver array with adjustment of local oscillator signals based on phase difference

    公开(公告)号:US09825694B2

    公开(公告)日:2017-11-21

    申请号:US15238877

    申请日:2016-08-17

    Abstract: Aspects of methods and systems for transceiver array synchronization are provided. An array based communications system comprises a plurality of transceiver circuits and an array coordinator. Each transceiver circuit of the plurality of transceiver circuits comprises a plurality of wireless transmitters and a local oscillator generator. Each wireless transmitter of the plurality of wireless transmitters is able to modulate a local oscillator signal from the local oscillator generator based on a weighted sum of a plurality of digital datastreams. The array coordinator is able to adjust a phase of a first local oscillator signal based on a phase difference between the first local oscillator signal and a second local oscillator signal. The first local oscillator signal is generated by a first local oscillator generator of a first transceiver circuit. The second local oscillator signal is generated by a second local oscillator generator of a second transceiver circuit.

    ALIASING ENHANCED OFDM COMMUNICATIONS
    154.
    发明申请

    公开(公告)号:US20170288929A1

    公开(公告)日:2017-10-05

    申请号:US15626504

    申请日:2017-06-19

    Inventor: Curtis Ling

    CPC classification number: H04L27/2628 H03M1/0629 H04L27/2647

    Abstract: A system comprises an analog front end (AFE), an analog-to-digital converter (ADC), and alias detection circuitry. The AFE may be operable to receive an analog signal via a communication medium, wherein a first frequency band of the analog signal is occupied by an OFDM symbol and a second frequency band of the analog signal is occupied by first aliases generated during digital-to-analog conversion of the OFDM symbol. The ADC is operable to digitize the particular band of the analog signal to generate a digital signal, wherein, during the digitization, aliasing of the first aliases results in second aliases which fall into the first frequency band. The alias detection circuitry is operable to detect the second aliases in the first frequency band of the digital signal, and process the digital signal based on the detected second aliases to generate an output signal.

    Method And System For An Analog Crossbar Architecture

    公开(公告)号:US20170264569A1

    公开(公告)日:2017-09-14

    申请号:US15608101

    申请日:2017-05-30

    Inventor: Curtis Ling

    CPC classification number: H04L49/101 H03M1/42 H04L5/26 H04L49/206 H04Q11/0001

    Abstract: Methods and systems for an analog crossbar may comprise, in a wireless device comprising a receiver path with an analog crossbar: receiving a digital signal comprising a plurality of channels; amplifying the received signal; converting the amplified signal to an analog signal; separating the analog signal into a plurality of separate channels; and routing the plurality of separate channels to desired signal paths utilizing the analog crossbar. The analog crossbar may comprise an array of complementary metal-oxide semiconductor (CMOS) transistors. The analog crossbar may comprise a plurality of differential pair signal lines, and a plurality of single-ended signal lines. The received signal may be amplified utilizing a low-noise amplifier (LNA), where a gain level of the LNA may be configurable. The analog signal may be separated into separate channels using a channelizer.

    Aliasing enhanced OFDM communications

    公开(公告)号:US09722843B2

    公开(公告)日:2017-08-01

    申请号:US15079862

    申请日:2016-03-24

    Inventor: Curtis Ling

    CPC classification number: H04L27/2628 H03M1/0629 H04L27/2647

    Abstract: A system comprises an analog front end (AFE), an analog-to-digital converter (ADC), and alias detection circuitry. The AFE may be operable to receive an analog signal via a communication medium, wherein a first frequency band of the analog signal is occupied by an OFDM symbol and a second frequency band of the analog signal is occupied by first aliases generated during digital-to-analog conversion of the OFDM symbol. The ADC is operable to digitize the particular band of the analog signal to generate a digital signal, wherein, during the digitization, aliasing of the first aliases results in second aliases which fall into the first frequency band. The alias detection circuitry is operable to detect the second aliases in the first frequency band of the digital signal, and process the digital signal based on the detected second aliases to generate an output signal.

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