摘要:
An amplifier includes a gain transistor including a control terminal to receive an input signal. A degeneration inductor is coupled between the first terminal of the gain transistor and ground. A shunt inductor and a capacitor are coupled in series between the control terminal of the gain transistor and ground, and form a filter to attenuate frequencies of the input signal within a frequency range. The degeneration inductor and the shunt inductor form a transformer to provide impedance matching.
摘要:
A coexistence interference mitigation method is provided. In a wireless network, a wireless device is equipped with multiple radios in the same device platform. The wireless device also has a control entity that communicates with the multiple co-located radio modules. A first radio module receives a notification from the control entity. The notification informs a critical signaling status of a second radio module co-located with the first radio module. Upon receiving the notification, the first radio module stops uplink transmission due to coexistence interference and transmits a coexistence indicator to its serving eNB. After a certain period, the first radio module receives a second notification that informs a completion status of the critical signaling of the second radio module. Upon receiving the second notification, the first radio module resumes uplink transmission and transmits a coexistence resume indicator to the eNB.
摘要:
A transceiver front-end for a communication device is connectable to a signal transmission and reception arrangement (310) adapted to transmit a transmit signal having a transmit frequency and to receive a receive signal having a receive frequency. The transceiver front-end is also connectable to a transmitter (330) adapted to produce the transmit signal, and to a receiver (320) adapted to process the receive signal. The transceiver front-end comprises a transmit frequency suppression filter arrangement (351, 352) and a receive frequency suppression filter arrangement (341, 342). The transmit frequency suppression filter arrangement is adapted to suppress transfer of a signal having the transmit frequency and to pass a signal having the receive frequency. The receive frequency suppression filter arrangement is adapted to suppress transfer of a signal having the receive frequency and to pass a signal having the transmit frequency. The transceiver front-end also comprises a transmit frequency cancellation arrangement (371, 372) and a receive frequency cancellation arrangement (361, 362). The transmit frequency cancellation arrangement is adapted to produce a first cancellation signal for cancellation, at receiver nodes (322, 323), of a suppressed signal having the transmit frequency, transferred by the transmit frequency suppression filter arrangement. The receive frequency cancellation arrangement is adapted to produce a second cancellation signal for cancellation, at signal transmission and reception arrangement nodes (312, 313), of a suppressed signal having the receive frequency, transferred by the receive frequency suppression filter arrangement. Corresponding transceiver, communication device and method are also disclosed.
摘要:
A method for operating a transceiver includes generating, by the transceiver, a first signal that includes an estimate of an interference signal leaked from a transmit path to a receive path of the transceiver. Generating the first signal includes obtaining a baseband transmit signal that includes a baseband of a transmit signal transmitted via the transmit path. Generating the first signal also includes calculating a harmonic phase that includes a phase of a harmonic of the baseband transmit signal. Generating the first signal also includes estimating a phase shift in accordance with an envelope of the baseband transmit signal. Generating the first signal also includes determining a phase of the first signal in accordance with the estimated phase shift and the calculated harmonic phase such that interference of a receive signal received via the receive path is reduced according to the first signal.
摘要:
A coexistence interference mitigation method is provided. In a wireless network, a wireless device is equipped with multiple radios in the same device platform. The wireless device also has a control entity that communicates with the multiple co-located radio modules. A first radio module receives a notification from the control entity. The notification informs a critical signaling status of a second radio module co-located with the first radio module. Upon receiving the notification, the first radio module stops uplink transmission due to coexistence interference and transmits a coexistence indicator to its serving eNB. After a certain period, the first radio module receives a second notification that informs a completion status of the critical signaling of the second radio module. Upon receiving the second notification, the first radio module resumes uplink transmission and transmits a coexistence resume indicator to the eNB.
摘要:
An object of the present invention is to wirelessly transmit an image signal received from an in-vivo-image acquiring device via a receiving antenna to an external display device in real time and to prevent interference between the image signal wirelessly transmitted and the image signal received via the receiving antenna. A receiving device 4 according to the present invention includes a receiving unit 10 that receives an image signal from a capsule endoscope introduced into a subject via a receiving antenna; a transmitting unit 14 that wirelessly transmits the image signal to an external viewer; a period detecting unit 11 that detects a non-receiving period in which the receiving unit 10 does not receive the image signal; and a control unit 18 that controls the constituent units of the receiving device 4. The control unit 18 estimates a non-receiving period immediately after a receiving period for the image signal based on non-receiving period information detected by the period detecting unit 11 and obtaining timing for the non-receiving period information, and causes the transmitting unit 14 to wirelessly transmit the image signal during the estimated non-receiving period.
摘要:
A coexistence interference mitigation method is provided. In a wireless network, a wireless device is equipped with multiple radios in the same device platform. The wireless device also has a control entity that communicates with the multiple co-located radio modules. A first radio module receives a notification from the control entity. The notification informs a critical signaling status of a second radio module co-located with the first radio module. Upon receiving the notification, the first radio module stops uplink transmission due to coexistence interference and transmits a coexistence indicator to its serving eNB. After a certain period, the first radio module receives a second notification that informs a completion status of the critical signaling of the second radio module. Upon receiving the second notification, the first radio module resumes uplink transmission and transmits a coexistence resume indicator to the eNB.
摘要:
A radio frequency (RF) signal separation and suppression system includes an input that couples in a radio frequency signal comprising desired and undesired radio frequency signals. The RF signal separation and suppression system also includes a reproduction generator connected to the input. The reproduction generator produces a reproduction from the radio frequency signal of the undesired signal at an output. The RF signal separation and suppression system also includes an electrical subtractor having a first input that is electrically connected to the output of the reproduction generator and a second input that is electrically connected to the input of the radio frequency signal separation system. An output of the subtractor generates an output radio frequency signal comprising the desired radio frequency signal and a suppressed undesired radio frequency signal.
摘要:
The disclosure relates to a cancellation device for cancelling interference caused by a non-linear device, the cancellation device comprising: an adaptive filter coupled in parallel to the non-linear device, wherein the adaptive filter is configured to filter an input signal of the non-linear device to generate an approximation signal approximating an output signal of the non-linear device; an error signal generator configured to generate an error signal based on a function of the output signal and the approximation signal; and a controller configured to adjust the adaptive filter based on the error signal and a phase and magnitude relation of the output signal and the input signal.
摘要:
The invention relates to a method for radio communication using a plurality of antennas, and to an apparatus for radio communication using a plurality of antennas. An apparatus for radio communication of the invention comprises: 4 antennas; a radio device; an antenna tuning apparatus having 2 antenna ports and 2 radio ports; a switching unit comprising 4 input ports each coupled to one of the antennas through a feeder, and 2 output ports, the switching unit operating in an active configuration in which it provides a path between any one of the output ports and one of the input ports, the active configuration being determined by a configuration instruction generated by the radio device; and a tuning control unit, the tuning control unit receiving a tuning instruction generated by the radio device, the tuning control unit delivering a plurality of tuning control signals to the antenna tuning apparatus.