Provided is a power control method of a transmitter. The method may include: generating a first aggregated carrier signal by aggregating multiple carrier signals; determining whether at least one peak exceeding a preset threshold is detected among the peaks of the first aggregated carrier signal; generating, if at least one peak exceeding the preset threshold is detected, at least one cancellation signal based on the detected at least one peak; and mapping the at least one cancellation signal to reserved subcarriers. It is possible to reduce the PAPR at the side of an amplifier by applying a tone reservation technique to multicarrier signals.

A wireless transmitter processing chain includes digital radio frequency mixing circuitry to generate, in digital form, a representation of a transmit signal including multiple communication channels. From the digital representation, a wideband digital to analog converter creates the analog transmit signal that includes the communication channels. Individual mixers and filters follow, with mixing frequencies tuned to place the communication channels at the desired frequency centers.

A low cost millimeter wave receiver and method for operating same is disclosed. In one embodiment, the method comprises receiving the first signal, converting the first signal of the first bandwidth into an intermediate frequency band, splitting the converted first signal into N of intermediate signals, each having a bandwidth less than the digital processor bandwidth, wherein N is an integer greater than one, downconverting each of the N intermediate signals to the second frequency band, processing the downconverted plurality of signals with the digital processor to generate N processed signals, upconverting each of the N processed signals to the intermediate frequency band, converting the upconverted signals to the third frequency band, and transmitting the converted signals.

Generally, this disclosure provides systems and methods for distributed phased array multiple input multiple output (DPA-MIMO) communications. A system may comprise a baseband processing unit; a plurality of beamforming (BF) modules each of which comprises at least a beamforming antenna and a transceiver circuit comprising at least a downconverter that downconverts a beamformed antenna radio frequency signal to an intermediate frequency signal, and an upconverter that upconverts an intermediate frequency signal to radio frequency and sends to said beamforming antenna for transmission; a plurality of intermediate frequency (IF) radios, each of which comprises a receive chain circuit that includes at least a downconverter that downconverts an intermediate frequency signal sent from said BF module to a basedband signal conveyed to said baseband processing unit, and a transmit chain circuit that includes at least an upconverter that upconverts a baseband signal received from said baseband processing unit to an intermediate frequency signal which is conveyed to said beamforming module; and a plurality of cables or any type of physical signal transmission medium, each of which connects one of said beamforming modules with one of said intermediate frequency radios.

A mobile wireless receiver is provided comprising an HF input, an intermediate-frequency output, a first and second mixer, which are each operated in common mode with a frequency of a local oscillator, a first balun circuit, which is coupled to the HF input and a second balun circuit, which is coupled to the intermediate-frequency output, a first common mode trap, which is coupled to the first balun circuit and the first and second mixer and a second common mode trap, which is coupled to the second balun circuit and the first and second mixer.

This disclosure relates to a devices and methods related to satellite information broadcasting. Example embodiments may include frequency shifting an intermediate frequency (IF) signal down-conversion from the microwave-band. As an example, down-conversion involving local oscillators may lead to frequency drift due to varying temperature and/or humidity conditions. Correcting for the frequency drift may provide an opportunity to remove or filter excess bandwidth. Further embodiments may include receiving, in a tuning request, information about a transponder type. A frequency translation module may be adjusted based, at least in part, on the transponder type related to the IF signal being input into the frequency translation module. Such frequency-shifting and transponder-specific filtering may allow Single-Wire Multiswitch (SWM) devices to provide output signals with narrower bandwidth, which may improve signal quality, cable run length, reduce power demands, etc.

A first network node of a cellular system is configured for communication with a second network node over a twisted pair wire. The first network node includes a receiver for receiving, over the twisted pair wire, an intermediate frequency signal from the second network node, which intermediate frequency signal has been converted from a high frequency signal having a frequency higher than the frequency of the intermediate frequency signal by the second network node, and a down-converter for converting the intermediate frequency signal to a low frequency signal having a frequency lower than the frequency of the intermediate frequency signal. The first network node also includes an up-converter for converting a received low frequency signal to an intermediate frequency signal having a frequency higher than the frequency of the low frequency signal.

A wireless transmitter processing chain includes digital radio frequency mixing circuitry to generate, in digital form, a representation of a transmit signal including multiple communication channels. From the digital representation, a wideband digital to analog converter creates the analog transmit signal that includes the communication channels. Individual mixers and filters follow, with mixing frequencies tuned to place the communication channels at the desired frequency centers.

An inductor structure includes a first quadrupole inductor, and a second quadrupole inductor, wherein the second quadrupole inductor overlaps the first quadrupole inductor. In certain aspects, the inductor structure may be included in a filter, which may also include one or more capacitors coupled to the inductor structure.

Examples of receivers, communication devices, and signal processing methods are described One example receiver includes a frequency mixer, a phase switching device, and an intermediate frequency processor. The phase switching device is coupled to the frequency mixer, and is configured to provide a first local oscillator signal for the frequency mixer or provide a second local oscillator signal for the frequency mixer. A difference between a phase of the first local oscillator signal and a phase of the second local oscillator signal is a first phase difference. The frequency mixer is coupled to the intermediate frequency processor, and is configured to: receive a signal provided by the phase switching device, perform frequency mixing on a received first signal based on the signal provided by the phase switching device, and provide a signal obtained through frequency mixing for the intermediate frequency processor.