A frequency band state determining method and a related device are provided. The method includes: A detection apparatus determines an intermediate frequency signal based on a detected interfering signal in an environment and an oscillation signal that belongs to a first frequency band. The detection apparatus performs first processing on the intermediate frequency signal, to obtain a first detection result, and when the first detection result indicates that the first frequency band is busy, the detection apparatus performs second processing on the intermediate frequency signal, to obtain a second detection result. The detection apparatus determines a state of the first frequency band based on the second detection result. The detection apparatus may be a radar, and the radar may work in a use scenario of a cooperative radar.

A carrier aggregation method can include amplifying a first signal with a first current converter to generate a current representative of the amplified first signal, and amplifying a second signal with a second current converter to generate a current representative of the amplified second signal. The method can further include processing the amplified first signal and the amplified second signal with an adder circuit, with the first current converter and the adder circuit forming a first cascode amplifier, and the second current converter and the adder circuit forming a second cascode amplifier. The method can further include providing an output signal at a common output node that is coupled to an output of each of the first and second cascode amplifiers.

An efficiently-transformed digital self-interference canceller, preferably including an FD transformer, a TD transformer, a channel estimator, a composer, and a controller. The canceller can optionally include a channel memory, a predictor, and/or an extender. A method for digital self-interference cancelation, preferably including receiving inputs, transforming the inputs, generating outputs based on the transformed inputs, transforming the outputs, and/or generating a cancellation signal based on the outputs.

A receiver includes a continuous-time equalizer, a decision-feedback equalizer (DFE), data and error sampling logic, and an adaptation engine. The receiver corrects for inter-symbol interference (ISI) associated with the most recent data symbol (first post cursor ISI) by establishing appropriate equalization settings for the continuous-time equalizer based upon a measure of the first-post-cursor ISI.

According to various embodiments, an electronic device comprises: a communication circuit for receiving a data communication signal including an interference signal by means of a power signal generated by a wireless power transmission device; and at least one processor, wherein the at least one processor can be configured to receive information related to the power signal from the wireless power transmission device through the communication circuit, estimate information about a channel with the wireless power transmission device, and use the communication circuit so as to remove, before decoding the data communication signal, the interference signal from the data communication signal on the basis of the information related to the power signal and the information about the channel Other various embodiments are possible.

Examples described herein include systems and methods which include wireless devices and systems with examples of full duplex compensation with a self interference noise calculator. The self-interference noise calculator may be coupled to antennas of a wireless device and configured to generate adjusted signals that compensate self-interference. The self-interference noise calculator may include a network of processing elements configured to combine transmission signals into sets of intermediate results. Each set of intermediate results may be summed in the self-interference noise calculator to generate a corresponding adjusted signal. The adjusted signal is received by a corresponding wireless receiver to compensate for the self-interference noise generated by a wireless transmitter transmitting on the same frequency band as the wireless receiver is receiving.

A network device includes a transceiver configured to concurrently transmit signals and receive signals within a single frequency band resulting in radio-frequency signal interference. The device includes an analog canceler configured to mitigate the signal interference. The device includes a neural network that receives data that describes characteristics of the signal interference and provides coefficients for the analog canceler as outputs. The neural network-generated coefficients are applied to the analog canceler which uses them to cancel the signal interference.

Methods, systems, and devices for wireless communication are described. A communication device, such as a user equipment (UE) may receive a set of demodulation reference signal (DMRS) samples including a first subset of DMRS samples associated with a first power level and a second subset of DMRS samples associated with a second power level. The UE may perform a digital post distortion operation based on the first subset of DMRS samples associated with the first power level and the second subset of DMRS samples associated with the second power level. The UE may receive the wireless communication based on performing the digital post distortion operation.

A method and apparatus for cancelling an interference in a received signal. The apparatus may include a plurality of receivers and one or more transmitters. The first receiver is configured to process a received signal. The first receiver includes a mixer to down-convert the received signal using a first local oscillator signal having a first frequency. The received signal includes a wanted signal and an unwanted signal. The second receiver is configured to process the received signal and generate an interference reference signal. The second receiver includes a mixer to down-convert the received signal using a second local oscillator signal having a second frequency. The apparatus includes an interference canceller configured to cancel, in a digital domain, at least in part interference caused by non-linear characteristics of the first receive chain in a presence of the unwanted signal from the down-converted received signal by the first receive chain.

A signal receiver and a slicer are capable of mitigating the static mismatch error of a far-end digital-to-analog converter. The slicer includes an adjustable slicing circuit and an error signal generating circuit. The adjustable slicing circuit determines which of (N+1) signal levels is corresponding to an input signal according to N slicer levels and thereby outputs an output signal, wherein the input signal is originated from the far-end digital-to-analog converter. The adjustable slicing circuit further adjusts at least some of the (N+1) signal levels according to an error signal and adjusts at least some of the N slicer levels, wherein the N is an integer greater than two. The error signal generating circuit is coupled to the adjustable slicing circuit and generates the error signal according to the input and output signals.