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.