[Object] To adaptively adjust a symbol interval in accordance with a communication environment. [Solution] An apparatus including: a communication unit configured to perform radio communication; and a control unit configured to perform control such that control information for adjusting a symbol interval in a complex symbol sequence into which a bit sequence is converted is transmitted from the communication unit to a terminal, the control information being set on a basis of a predetermined condition.

Disclosed herein are an apparatus and method for receiving a signal based on FTN. The apparatus for receiving a signal based on FTN includes an equalizer for creating a Log Likelihood Ratio (LLR) sequence by equalizing an FTN signal sequence sampled at an FTN signaling rate; a deinterleaver for deinterleaving the created LLR sequence; a decoder for decoding the LLR sequence by correcting errors in the deinterleaved LLR sequence; an interleaver for interleaving the decoded LLR sequence and providing the interleaved LLR sequence to the equalizer; and an FTN interference estimation unit for providing the FTN signal sequence, from which an FTN interference sequence is eliminated, to the equalizer, using the interleaved LLR sequence.

Certain examples of the present disclosure relate to an apparatus (10), method (400) and computer program (14) for: receiving at least one first signal (501) comprising an indication of at least one bit of a first System Frame Number, SFN (302); determining, based at least in part on the received at least one first signal, at least one value of a reliability metric for the at least one bit of the first SFN; receiving at least one second signal (503) comprising an indication of at least one bit of a second SFN different than the first SFN; determining, based at least in part on the received at least one second signal and the determined at least one value of the reliability metric for the at least one bit of the first SFN, at least one value of a reliability metric for the at least one bit of the second SFN.

An apparatus including: a communication unit configured to perform radio communication; and a control unit configured to perform control such that control information for adjusting a symbol interval in a complex symbol sequence into which a bit sequence is converted is transmitted from the communication unit to a terminal, the control information being set on a basis of a predetermined condition.

Methods and apparatuses for UE initiated reporting in a wireless communication system. A method of operating a UE includes: transmitting UE capability information supporting a FTN; generating data modulation symbols including a set of zero symbols, wherein the data modulation symbols are up-sampled or zero-padded; performing, to obtain DFT output signal, a DFT spread operation on the up-sampled or the zero-padded data modulation symbols; performing, based on a target FTN compression rate and a SC allocation, a discarding or a down sampling operation on the DFT output signal, wherein the discarding or the down sampling operation generates a subset of DFT symbols; mapping the subset of DFT symbols to a set of SCs; and performing an IFFT operation on the subset of DFT symbols to obtain an FTN-DFT-S-OFDM signal including the target FTN compression rate comprising a positive rational number smaller than one.

A radio receiving apparatus includes: a radio receiving circuit that frequency-converts a radio signal frequency-modulated with a baseband signal into an intermediate frequency signal; a frequency component detecting circuit that samples the intermediate frequency signal using an over-sampling frequency that is variable and detects a plurality of frequency components in the intermediate frequency signal; and a control circuit that detects a data rate of the baseband signal that is included in the intermediate frequency signal, detects a signal level of the intermediate frequency signal, and determines and sets the over-sampling frequency for the frequency component detecting circuit in accordance with the data rate of the baseband signal and the signal level of the intermediate frequency signal.

A radio base station that communicates with a user terminal, and has a control section that executes control so that signals are time-division-multiplexed over a first radio resource region where symbols are multiplexed at a rate equal to or below a Nyquist rate and a second radio resource region where symbols are multiplexed at a faster rate than the Nyquist rate. The radio base station also includes a transmission section that transmits the signals that are time-division-multiplexed in the first radio resource region and the second radio resource region, to the user terminal to reduce the interference against predetermined signals in a radio communication system in which Faster-Than-Nyquist (FTN) is used.