Methods and systems for a passive noise dampener. A system includes a hybrid fiber-coaxial network which carries content signals between a service provider system and premises, where the hybrid fiber-coaxial network is susceptible to receiving wireless noise signals, a plurality of passive noise dampeners, each passive noise dampener connected between the hybrid fiber-coaxial network and a premise of the premises. Each passive noise dampener includes an antenna based on medium used in the hybrid fiber-coaxial network. The antenna receives the wireless noise signals. A phase shifting device phase shifts 180 degrees phase shift the wireless noise signals received by the antenna to generate a counter signal. A directional coupler injects the counter signal into the hybrid fiber-coaxial network to mitigate impact of the wireless noise signals received by the hybrid fiber-coaxial network on the content signals. The antenna, the phase shifting device, and the directional coupler are passive devices.

Methods and systems for a passive noise dampener. A system includes a hybrid fiber-coaxial network which carries content signals between a service provider system and premises, where the hybrid fiber-coaxial network is susceptible to receiving wireless noise signals, a plurality of passive noise dampeners, each passive noise dampener connected between the hybrid fiber-coaxial network and a premise of the premises. Each passive noise dampener includes an antenna based on medium used in the hybrid fiber-coaxial network. The antenna receives the wireless noise signals. A phase shifting device phase shifts 180 degrees phase shift the wireless noise signals received by the antenna to generate a counter signal. A directional coupler injects the counter signal into the hybrid fiber-coaxial network to mitigate impact of the wireless noise signals received by the hybrid fiber-coaxial network on the content signals. The antenna, the phase shifting device, and the directional coupler are passive devices.

An electronic device provided includes a communication module, an external module, and a signal integration circuit including first to fourth input ports, and first and second output ports. The first input port is for inputting an input signal. The second input port is for inputting a first L1 band signal. The third input port is for inputting a first L5 band signal. The fourth input port is for inputting a second L1 band signal and a second L5 band signal. The first output port selectively outputs a first output signal and a second output signal. The second output port selectively outputs the first L5 band signal and the second L5 band signal. When the fourth input port is not coupled to an external module, the first output port outputs the first output signal, and the second output port outputs the first L5 band signal.

An electronic device provided includes a communication module, an external module, and a signal integration circuit including first to fourth input ports, and first and second output ports. The first input port is for inputting an input signal. The second input port is for inputting a first L1 band signal. The third input port is for inputting a first L5 band signal. The fourth input port is for inputting a second L1 band signal and a second L5 band signal. The first output port selectively outputs a first output signal and a second output signal. The second output port selectively outputs the first L5 band signal and the second L5 band signal. When the fourth input port is not coupled to an external module, the first output port outputs the first output signal, and the second output port outputs the first L5 band signal.

Methods and systems for a passive noise dampener. A system includes a hybrid fiber-coaxial network which carries content signals between a service provider system and premises, where the hybrid fiber-coaxial network is susceptible to receiving wireless noise signals, a plurality of passive noise dampeners, each passive noise dampener connected between the hybrid fiber-coaxial network and a premise of the premises. Each passive noise dampener includes an antenna based on medium used in the hybrid fiber-coaxial network. The antenna receives the wireless noise signals. A phase shifting device phase shifts 180 degrees phase shift the wireless noise signals received by the antenna to generate a counter signal. A directional coupler injects the counter signal into the hybrid fiber-coaxial network to mitigate impact of the wireless noise signals received by the hybrid fiber-coaxial network on the content signals. The antenna, the phase shifting device, and the directional coupler are passive devices.

At high frequencies planned for 5G and 6G, phase noise may be a limiting factor on reliability and throughput. The default modulation scheme is currently QAM. Disclosed is a more versatile demodulation method based on the amplitude and phase of the sum-signal, which is the vector sum of the two branch amplitudes of QAM. The transmitter modulates a message by sum-signal amplitude and phase. The receiver can process the received waveform according to quadrature branches as usual, and determines the branch amplitudes. The receiver then calculates, from the branch amplitudes, the sum-signal amplitude and sum-signal phase for demodulation. The receiver can thereby obtain substantially enhanced phase-noise tolerance and amplitude spacing uniformity at virtually no cost. In addition, methods are disclosed for determining specific message fault types and non-square modulation tables depending on the type of mitigation required. Sum-signal modulation can provide access to high-frequency bands with enhanced reliability and throughput.

At high frequencies planned for 5G and 6G, phase noise may be a limiting factor on reliability and throughput. The default modulation scheme is currently QAM. Disclosed is a more versatile demodulation method based on the amplitude and phase of the sum-signal, which is the vector sum of the two branch amplitudes of QAM. The transmitter modulates a message by sum-signal amplitude and phase. The receiver can process the received waveform according to quadrature branches as usual, and determines the branch amplitudes. The receiver then calculates, from the branch amplitudes, the sum-signal amplitude and sum-signal phase for demodulation. The receiver can thereby obtain substantially enhanced phase-noise tolerance and amplitude spacing uniformity at virtually no cost. In addition, methods are disclosed for determining specific message fault types and non-square modulation tables depending on the type of mitigation required. Sum-signal modulation can provide access to high-frequency bands with enhanced reliability and throughput.

A system and method for mitigating self-interference in mmWave systems. A transceiver can include a mutual precoder controller that controls both an analog/RF beamforming circuit and a digital/BB beamforming circuit to prefer beams directed along paths in the local RF environment that minimize self-interference. In other cases, a transceiver can include one or more self-interference filters to internally mitigate self-interference.

A signal adjusting circuit and a receiving end circuit using the same are provided. The signal adjusting circuit is adapted to a peak detector, and includes a first amplifier and a first feedback circuit. The first amplifier receives a first input signal, and amplifies the first input signal to output a first output signal. The first feedback circuit is connected between a first input terminal and a first output terminal of the first amplifier, and is configured to determine a first gain of the first output signal. The peak detector is connected to a first output node of the first feedback circuit, so as to receive a first detection signal and detect a peak value of the first detection signal. The peak detector has a predetermined power input range, and the first feedback circuit keeps the first detection signal within the predetermined power input range.

Systems and methods for duplexer circuits having signal cancellation paths are provided. In one aspect, a duplexer circuit includes a first transmit filter configured to receive a first radio frequency transmit signal from a power amplifier, and a first receive filter configured to receive the first radio frequency transmit signal from the first transmit filter. The circuit also includes a first low-noise amplifier configured to receive the first radio frequency transmit signal from the first receive filter and amplify the first radio frequency transmit signal and a cancellation path configured to receive a second radio frequency transmit signal from the power amplifier. The circuit further includes a phase shifter configured to apply a phase shift to one or both of the first and second radio frequency transmit signals, and a second low-noise amplifier configured to amplify the second radio frequency transmit signal.