A WIFI device and an operating method and device of WIFI chips in a WIFI device are provided. In the operating method, an instruction indicating selection of an operation mode of a first WIFI chip and a second WIFI chip in a WIFI device is received (S202); the first WIFI chip is triggered to operate on a first frequency band and the second WIFI chip is triggered to operate on a second frequency band when the operation mode indicated by the instruction is a first mode (S204). The first WIFI chip supports the first frequency band and the second frequency band, and the second WIFI chip supports the second frequency band.

An audio transmission method and an electronic device are provided. The audio transmission method includes: modulating, when the first electronic device transmits audio to a second electronic device, an audio signal transmitted to the second electronic device into at least two target radio frequency signals; and combining the at least two target radio frequency signals in a first time slot, and outputting a combined radio frequency signal to the second electronic device, where frequency bands of the at least two target radio frequency signals are different in the first time slot.

Methods related to radio frequency front end systems. In some embodiments, the method can include providing a first module configured to provide multi-input multi-output (MIMO) receive operations for a first plurality of mid bands and a first plurality of high bands. The first module can be further configured to provide transmit operations for the plurality of mid bands. The first module can include a first node. The method can include providing a second module configured to provide transmit and receive operations for a second plurality of mid bands and a second plurality of high bands. The second module can be a power amplifier integrated duplexer (PAiD) module. The second module can include a second node. The first module and the second module can be coupled by a signal path at the first node and the second node, respectively.

A system for interference mitigation includes: a first transmit coupler; a receive-band noise cancellation system; a first transmit-band filter; a second transmit coupler; a first receive coupler; a transmit-band noise cancellation system; a first receive-band filter; and a second receive coupler.

A system for interference mitigation includes: a first transmit coupler; a receive-band noise cancellation system; a first transmit-band filter; a second transmit coupler; a first receive coupler; a transmit-band noise cancellation system; a first receive-band filter; and a second receive coupler.

Embodiments herein describe adapting a PIM model to compensate for changing PIM interference. A PIM model can include circuitry that generates a PIM compensation value that compensates for (i.e., mitigates or subtracts) PIM interference caused by transmitting two or more transmitter (TX) carriers in the same path. The disclosed adaptive scheme generates updated coefficients for the PIM model which are calculated after the RX signal has been removed from the RX channel. In this manner, as the PIM interference changes due to environmental conditions (e.g., temperature at the base station), the adaptive scheme can update the PIM model to generate a PIM compensation value that cancels the PIM interference.

A radio-frequency front end module comprises a first substrate, a second substrate arranged opposing the first substrate, one or more resonators disposed on a surface of the first substrate, the first surface of the first substrate facing the second substrate, and one or more antennas that are each supported by the first substrate and the second substrate. A beamforming antenna is also provided, as is a wireless mobile device.

An acoustic wave device is disclosed. The acoustic wave device can include a piezoelectric layer, an interdigital transducer electrode over the piezoelectric layer, a temperature compensation layer over the interdigital transducer electrode, and a dielectric layer that is positioned partially between the piezoelectric layer and the interdigital transducer electrode. The dielectric layer that is positioned so as to partially electro-mechanically de-couple the piezoelectric layer from the interdigital transducer electrode.

Apparatuses and methods are disclosed regarding a multiband transmitter. In an example aspect, an apparatus for processing signals for wireless transmission includes a wireless interface device. The wireless interface device includes an upconverter, a tunable filter, and a driver amplifier. The upconverter has an output and is configured to upconvert a baseband frequency to a radio frequency based on a local oscillator signal. The tunable filter has an input and an output; the input of the tunable filter is coupled to the output of the upconverter. The driver amplifier has an input; the input of the driver amplifier is coupled to the output of the tunable filter.

A radio-frequency architecture is provided. By setting an independent radio-frequency channel including a B13 duplexer, LTE_B13 main wave signals, being output by a power amplifier and passing through the B13 duplex, are emitted directly from a second main antenna without passing through any non-linear device.