Abstract: There are disclosed various methods and apparatuses for providing power to a set of power amplifiers. In some embodiments the method comprises obtaining first transmission parameters associated with a first transmit signal, selecting one or more output voltage values on the basis of the first transmission parameters, controlling a multi-level power source to generate one or more output voltages on the basis of the one or more output voltage values, multiplexing based on the first transmit signal between two or more of the output voltages and a first supply voltage terminal of a first power amplifier, and amplifying the first transmit signal with the first power amplifier.

Abstract: Usefulness of resource usage sensing information is determined by at least one node in a radio system. Transmission of sensing result information in the radio system is then controlled based at least in part on the determined usefulness.

Abstract: There are disclosed various methods and apparatuses for providing power to a set of power amplifiers. In some embodiments the method comprises obtaining first transmission parameters associated with a first transmit signal, selecting one or more output voltage values on the basis of the first transmission parameters, controlling a multi-level power source to generate one or more output voltages on the basis of the one or more output voltage values, multiplexing based on the first transmit signal between two or more of the output voltages and a first supply voltage terminal of a first power amplifier, and amplifying the first transmit signal with the first power amplifier.

Abstract: There are disclosed various methods and apparatuses for providing power to a power amplifier. In some embodiments the method comprises producing a first reference signal having a level above a target signal, and producing a second reference signal having a level below the target signal. A positive supply voltage that tracks the first reference signal and a negative supply voltage that tracks the second reference signal are provided to a driver. A signal corresponding to the target signal is supplied from the driver to a power amplifier. In some embodiments the apparatus comprises means for implementing the method.

Abstract: A method for interference-aware scheduling is provided. The method can include acquiring a plurality of interference characteristics, each of the interference characteristics associated with a range of communication resources. The method may further include combining at least two of the interference characteristics into a combined interference characteristic, and transmitting a message encoding the combined interference characteristic.

Abstract: In some example embodiments, there is provided an apparatus. The apparatus may include a direct current voltage source and/or an alternating current voltage source to track a power envelope of a radio frequency signal. The apparatus may further include first and second power amplifiers with bias voltage inputs and a supply voltage inputs, and a switch matrix. The first input may be coupled to the direct current voltage source, the second input may be coupled to the alternating current voltage source. The outputs may be coupled to the bias and supply inputs to the power amplifiers. The switch matrix may enable activation of the first power amplifier, the second power amplifier, both the first and second power amplifiers, or neither power amplifier.

Abstract: In accordance with an example embodiment of the present invention, an apparatus comprises a transceiver configured to receive a transmission signal from a radio node; a processor configured to, based on the received transmission signal, determine membership of the apparatus and the radio node in a common synchronization group and based at least in part on the determination, adjusting at least one transmission parameter.

Abstract: In some example embodiments, there is provided an apparatus. The apparatus may include a direct current voltage source and/or an alternating current voltage source to track a power envelope of a radio frequency signal. The apparatus may further include first and second power amplifiers with bias voltage inputs and a supply voltage inputs, and a switch matrix. The first input may be coupled to the direct current voltage source, the second input may be coupled to the alternating current voltage source. The outputs may be coupled to the bias and supply inputs to the power amplifiers. The switch matrix may enable activation of the first power amplifier, the second power amplifier, both the first and second power amplifiers, or neither power amplifier.

Abstract: An apparatus, method and system for reducing discontinuities between waveforms in a communication system. In one embodiment, an apparatus includes a processor and memory including computer program code. The memory and the computer program code are configured, with the processor, to determine an amplitude and set of derivatives at an end point of a first symbol waveform, and determine an amplitude and set of derivatives at a beginning point of a second symbol waveform. The memory and the computer program code are configured, with the processor, to insert a guard period waveform having an amplitude and set of derivatives at a first end to substantially match the amplitude and set of derivatives at the end point of the first symbol waveform and an amplitude and set of derivatives at a second end that substantially matches the amplitude and set of derivatives at the beginning point of the second symbol waveform.

Abstract: Communication apparatus, method and computer program product for communication in a communication system. While a transmitter of a transceiver module of a user equipment is transmitting, a first receiver is operated on a first received signal, and a second receiver is operated on a transmitted signal from the transmitter. While the transmitter is not transmitting, the second receiver is operated on a second received signal.

Abstract: An apparatus, system and method for providing interference cancellation and communication resource reservation limits to allocate communication resources in a communication system. In one embodiment, the apparatus includes a processor and memory including computer program code. The memory and the computer program code are configured, with the processor, to cause the apparatus to identify an interval of received signal power levels for interference cancellation of an interfering signal to a primary signal, and generate a message that provides the interval of received signal power levels for the interference cancellation of the interfering signal to the primary signal. In a related embodiment, the memory and the computer program code are configured, with the processor, to cause the apparatus to determine a communication resource reservation limit, and request an increase in the communication resource reservation limit.

Abstract: Measures for interference reduction for an envelope branch type transmitter. Such measures may include determination of a target frequency span for reducing interference caused by an envelope branch type transmitter, and configuration of a differential delay between a signal branch and an envelope branch of the envelope branch type transmitter on the basis of the determined target frequency span.

Abstract: A method, apparatus, system, and computer program product example embodiments of the invention are disclosed to structure access to a wireless medium to reduce interference between nearby nodes. In example embodiments of the invention, a method includes the steps of determining an amount of available wireless communication resources in a reception area; determining a number of wireless communication nodes in the reception area; generating a reservation limit of the available wireless resources; determining an inability to allocate the reservation limit of the available wireless resources; transmitting a request for release of resources to at least one other wireless communication node. Another node receiving the request, performs a method including the steps of determining a threshold; comparing an allocated amount of wireless communication resources against the threshold; and releasing at least a part of the allocated amount of resources, if the reserved number is greater than the threshold.

Abstract: Embodiments of the disclosed invention address a method, apparatus and computer program product for enabling enhanced transmitter noise shaping. Thereby, a first digital-to-analog conversion is performed on a digital signal resulting in first analog signal, a noise shaping on the digital signal is performed for obtaining a noise shaped signal and performing a second digital-to-analog conversion on the noise shaped signal resulting in a second analog signal, and the first analog signal and the second analog signal are added for obtaining an output signal.

Abstract: An apparatus, which includes a local oscillator configured to oscillate at a carrier frequency and having output ports and configured to provide a signal of a respective phase at each of the output ports, wherein the respective phases are different from each other, a plurality of branches, each branch corresponds to one of the output ports and includes a mixer unit, where for each branch, the signal of the respective phase is applied to an input port of the mixer unit and the mixer unit is configured to modulate a baseband signal by the signal of the respective phase of the local oscillator to obtain, at its output port, a respective modulated signal and; a combiner configured to add the modulated signals from the branches to obtain a total signal to be output to a load; and at least one of the branches includes a multi-switch.

Abstract: In a non-limiting and exemplary embodiment, a method is provided for adapting a device set of one or more radio devices providing detection estimates for the presence of a primary radio resource user. A first detection estimate for the presence of the user is determined on the basis of spectrum sensing. At least one other detection estimate for the presence of the user is received from the device set. A detection value is generated on the basis of the first detection estimate and the at least one other detection estimate, and the device set is adapted on the basis of the detection value.

Abstract: Measures are provided for performing direct radio-frequency to digital conversion. A radio-frequency input signal is compared with a plurality of reference voltages to generate a plurality of comparison signals, each comparison signal corresponding to one of the plurality of reference voltages. One or more of the plurality of generated comparison signals are first filtered to generate a first filtered signal. One or more of the plurality of generated comparison signals are second filtered to generate a second filtered signal. A digital output signal is generated at least on the basis of the first filtered signal and the second filtered signal.

Abstract: An apparatus, system and method for providing interference cancellation and communication resource reservation limits to allocate communication resources in a communication system. In one embodiment, the apparatus includes a processor and memory including computer program code. The memory and the computer program code are configured, with the processor, to cause the apparatus to identify an interval of received signal power levels for interference cancellation of an interfering signal to a primary signal, and generate a message that provides the interval of received signal power levels for the interference cancellation of the interfering signal to the primary signal. In a related embodiment, the memory and the computer program code are configured, with the processor, to cause the apparatus to determine a communication resource reservation limit, and request an increase in the communication resource reservation limit.

Abstract: Embodiments of the disclosed invention address a method, apparatus and computer program product for enabling enhanced transmitter noise shaping. Thereby, a first digital-to-analog conversion is performed on a digital signal resulting in first analog signal, a noise shaping on the digital signal is performed for obtaining a noise shaped signal and performing a second digital-to-analog conversion on the noise shaped signal resulting in a second analog signal, and the first analog signal and the second analog signal are added for obtaining an output signal.

Abstract: An apparatus, system and method for providing interference cancellation and communication resource reservation limits to allocate communication resources in a communication system. In one embodiment, the apparatus includes a processor (1320) and memory (1350) including computer program code. The memory (1350) and the computer program code are configured, with the processor (1320), to cause the apparatus to identify an interval of received signal power levels for interference cancellation of an interfering signal to a primary signal, and generate a message that provides the interval of received signal power levels for the interference cancellation of the interfering signal to the primary signal. In a related embodiment, the memory (1350) and the computer program code are configured, with the processor (1320), to cause the apparatus to determine a communication resource reservation limit, and request an increase in the communication resource reservation limit.