Abstract: According to an example aspect of the present disclosure, there is provided a method for transmitting a Discrete Fourier Transform-spread-Orthogonal Frequency Domain Multiplexed. DFT-s-OFDM, signal, the method comprising, converting, by a wireless transmitter, complex-valued symbols to polar domain symbols, wherein the complex-valued symbols are modulated using at least phase shift keying, processing, by the wireless transmitter, angle values of the polar domain symbols to avoid angle differences larger than ? rad, or lower than ?? rad, between consecutive angle values, interpolating, by the wireless transmitter, at least the processed angle values by an interpolation factor N/L, wherein L is a length of Fast Fourier Transform, FFT, and Nis length of Inverse FFT, IFFT, converting, by the wireless transmitter, the interpolated angle values into complex domain symbols and generating, by the wireless transmitter, a DFT-s-OFDM waveform comprising said complex domain symbols.

Abstract: There is provided an apparatus comprising means for: receiving, from a network node, a configuration message for frequency domain spectral shaping, wherein the configuration message is indicative of at least one or more filter parameters; determining a frequency domain window function according to the one or more filter parameters; and transmitting an uplink transmission applying the determined frequency domain window function.

Abstract: This document discloses a solution for modulating and demodulating signals transferred over a communication channel.

Abstract: Various techniques are provided for determining, by a network device, a number indicating a quantity of user equipment (UE) that are in an idle state, determining, by the network device, whether the network device can operate in an energy-saving transmission mode based on the number indicating a quantity of UE that are in an idle state, in response to determining the network device can operate in the energy-saving transmission mode using, by the network device, energy-saving transmissions, and notifying, by the network device, at least one UE being served by the network device of the energy-saving transmissions.

Abstract: This document discloses a solution for occupying time-frequency resources for a wireless transmission.

Abstract: To enable spectrum shaping also when excess band is used, at least one set of spectral flatness requirements amongst two or more sets comprises at least at least a first parameter value for a first in-band range, at least a second parameter value for a second in-band range and at least a third parameter value for the excess band range, and a set to be used is selected at least based on information on the use of the excess band.

Abstract: According to example embodiments, a method may include transmitting, by a user device to a wireless network node, data via a plurality of uplink component carriers including at least a first uplink component carrier and a second uplink component carrier; wherein a first subset of physical resource blocks for the first component carrier is contiguous with a second subset of physical resource blocks for the second component carrier; wherein the first component carrier and the second component carrier have a same power spectral density; and applying a modified radio frequency requirement by the user device wherein the modified radio frequency requirement impacts a transmission power of the first uplink component carrier and of the second uplink component carrier.

Abstract: According to an aspect, there is provided an apparatus comprising for performing the following. The apparatus receives a stream of orthogonal frequency division multiplexing symbols and associated cyclic prefixes produced by at least one orthogonal frequency-division multiplexing modulator of a radio transmitter or transceiver. The apparatus divides said stream into a plurality of overlapping processing blocks of a first length. At least one of the plurality of overlapping processing blocks comprises a non-overlapping section having values corresponding to a segment of said stream. The dividing comprises adjusting a length of the non-overlapping section at least based on whether a cyclic prefix is comprised in said segment and, if this is true, on a length of said cyclic prefix. The apparatus filters the plurality of overlapping processing blocks using fast convolution processing and concatenates filtered processing blocks to form an output signal for transmission using the radio transmitter or transceiver.

Abstract: According to an aspect, there is provided an apparatus comprising for performing the following. The apparatus receives a stream of orthogonal frequency division multiplexing symbols and associated cyclic prefixes produced by at least one orthogonal frequency-division multiplexing modulator of a radio transmitter or transceiver. The apparatus divides said stream into a plurality of overlapping processing blocks of a first length. At least one of the plurality of overlapping processing blocks comprises a non-overlapping section having values corresponding to a segment of said stream. The dividing comprises adjusting a length of the non-overlapping section at least based on whether a cyclic prefix is comprised in said segment and, if this is true, on a length of said cyclic prefix. The apparatus filters the plurality of overlapping processing blocks using fast convolution processing and concatenates filtered processing blocks to form an output signal for transmission using the radio transmitter or transceiver.

Abstract: According to an aspect, there is provided a waveform processing device. The waveform processing device includes circuitry for receiving an input signal including one or more subsequent orthogonal frequency division multiplexing, OFDM, symbol blocks each of which includes a cyclic prefix and an OFDM data block and corresponds to one or more subbands. Further, the waveform processing device includes circuitry for segmenting each OFDM symbol block of the input signal into a set of a pre-defined number of partially overlapping signal blocks of equal length so that non-overlapping samples of the pre-defined number of partially overlapping signal blocks in each set include, in combination, an OFDM data block. Moreover, the waveform processing device includes circuitry for filtering each signal block in each set and for combining the filtered signal blocks in each set using overlap-and-save processing to produce one or more filtered OFDM data blocks for each subband.

Abstract: According to an aspect, there is provided a waveform processing device. Said waveform processing device comprises means for performing the following. Upon receiving one or more input signals, each of which corresponds to a different subband, the waveform processing device segments each of the one or more input signals to a subband-specific set of parallel signal blocks. Then, the waveform processing device filters each subband-specific set by applying at least a first time window function, a transform-plane window function and a second time window function in this order. Finally, the waveform processing device concatenates filtered signals to an output signal.

Abstract: According to an aspect, there is provided a waveform processing device. The waveform processing device includes circuitry for receiving an input signal including one or more subsequent orthogonal frequency division multiplexing, OFDM, symbol blocks each of which includes a cyclic prefix and an OFDM data block and corresponds to one or more subbands. Further, the waveform processing device includes circuitry for segmenting each OFDM symbol block of the input signal into a set of a pre-defined number of partially overlapping signal blocks of equal length so that non-overlapping samples of the pre-defined number of partially overlapping signal blocks in each set include, in combination, an OFDM data block. Moreover, the waveform processing device includes circuitry for filtering each signal block in each set and for combining the filtered signal blocks in each set using overlap-and-save processing to produce one or more filtered OFDM data blocks for each subband.

Abstract: According to an aspect, there is provided a waveform processing device. Said waveform processing device comprises means for performing the following. Upon receiving one or more input signals, each of which corresponds to a different subband, the waveform processing device segments each of the one or more input signals to a subband-specific set of parallel signal blocks. Then, the waveform processing device filters each subband-specific set by applying at least a first time window function, a transform-plane window function and a second time window function in this order. Finally, the waveform processing device concatenates filtered signals to an output signal.