Apparatus and method for de-embedding a combiner from a balanced signal

    公开(公告)号:US10895588B1

    公开(公告)日:2021-01-19

    申请号:US15958927

    申请日:2018-04-20

    申请人: Tektronix, Inc.

    摘要: A test and measurement system including a plurality of channels and one or more processors. The one or more processors are configured to cause the test and measurement system to receive, via a first channel of the plurality of channels, a positive side of a reference differential signal pair, receive, via a second channel of the plurality of channels, a negative side of the reference differential signal pair, and produce a reference signal based the reference differential signal pair. A combined signal is received, from a combiner, that is a balanced signal produced from the reference differential signal pair. A de-embed filter is generated based on the reference signal and the combined signal and an additional signal is received from the combiner and an effect of the combiner is removed from the additional signal by applying the de-embed filter to the additional signal.

    Method for calibrating an onboard unit, system, and onboard unit therefor

    公开(公告)号:US10826556B2

    公开(公告)日:2020-11-03

    申请号:US15702165

    申请日:2017-09-12

    发明人: Alastair Malarky

    摘要: The disclosed subject-matter relates to a method for calibrating an onboard unit of a vehicle identification system, the method comprising: emitting at least one polling message from a first radio beacon; in the first radio beacon, determining a link margin of a communication with a first onboard unit by evaluating a response message of the first onboard unit to the polling message(s); and sending a configuration message from the first radio beacon or a second radio beacon to the first onboard unit or to a second onboard unit with a same characteristic as the first onboard unit to adjust a receive sensitivity or a transmit power of the first or the second onboard unit, respectively, to a level derived from the determined link margin. Alternative embodiments relate to a system and to an onboard unit used in the method.

    Impulse noise management
    79.
    发明授权

    公开(公告)号:US10805040B2

    公开(公告)日:2020-10-13

    申请号:US16448939

    申请日:2019-06-21

    申请人: TQ DELTA, LLC

    发明人: Marcos C. Tzannes

    摘要: A discrete multitone transceiver (DMT) includes a deinterleaver operable to de-interleave a plurality of bits. The DMT further includes: a forward error correction decoder operable to decode the plurality of bits, a module operable to determine, during Showtime, an impulse noise protection value, wherein the impulse protection value specifies a number corrupted DMT symbols that can be corrected by the forward error correction decoder in combination with the deinterleaver, and a receiver coupled to the deinterleaver. The receiver receives using a first interleaver parameter value, receives a flag signal, and changes to receiving using a second interleaver parameter value that is different than the first interleaver parameter value, wherein the second interleaver parameter value is used for reception on a pre-defined forward error correction codeword boundary following reception of the flag signal.

    SELF-INTERFERENCE CANCELLATION SYSTEM AND METHOD

    公开(公告)号:US20200313716A1

    公开(公告)日:2020-10-01

    申请号:US16364643

    申请日:2019-03-26

    申请人: Inter Corporation

    IPC分类号: H04B1/525 H04L5/14 H04B15/00

    摘要: Systems, methods, and circuitries are disclosed for performing self-interference cancellation in a transceiver. In one example, a self-interference cancellation system includes a cancellation signal circuitry, cancellation circuitry, down-conversion circuitry, and an LO derivation circuitry. The cancellation signal circuitry is configured to use a cancellation transmit (TX) local oscillator (LO) signal to up-convert a baseband transmit leakage replica signal to generate a cancellation signal. The cancellation circuitry is configured to combine the cancellation signal with a received signal to generate a corrected received signal. The down-conversion circuitry is configured to use a receive (RX) LO signal to down-convert the corrected received signal to generate a baseband received signal. The LO derivation circuitry is configured to derive the cancellation TX LO signal and the RX LO signal from a common LO signal.