A wireless device (e.g., a UE or a base station) may identify a first subcarrier mapping associated with one or more redundant subcarriers. The one or more redundant subcarriers may correspond to one or more UWs in a UW-OFDM waveform. The wireless device may identify a second subcarrier mapping associated with one or more reference signals. A simultaneous application of the first subcarrier mapping and the second subcarrier mapping may be associated with one or more collisions. The wireless device may modify at least one of the first subcarrier mapping or the second subcarrier mapping to eliminate the one or more collisions. The wireless device may generate the UW-OFDM waveform based on the modified at least one of the first subcarrier mapping or the second subcarrier mapping. The wireless device may transmit a signal based on the generated UW-OFDM waveform.

A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for transmitting broadcast signals comprises an encoder for encoding service data, a mapper for mapping the encoded service data into a plurality of OFDM (Orthogonal Frequency Division Multiplex) symbols to build at least one signal frame, a frequency interleaver for frequency interleaving data in the at least one signal frame by using a different interleaving-seed which is used for every OFDM symbol pair comprised of two sequential OFDM symbols, a modulator for modulating the frequency interleaved data by an OFDM scheme and a transmitter for transmitting the broadcast signals having the modulated data, wherein the different interleaving-seed is generated based on a cyclic shifting value and wherein an interleaving seed is variable based on an FFT size of the modulating.

The resulting two-sided ISI effect can be migrated to an equivalent noncausal communication channel. Then, a method for mitigating two-sided ISI and compensating the noncausal channel effect is proposed. The method includes insertion and removal of CP and CS. When CS and CP are inserted at transmitter and removed at receiver in block transmission-based communication systems, it is possible to generate a circulant convolution matrix for noncausal communication channel. In addition, the method includes equalization of a noncausal communication channel in block transmission-based communication systems when the channel state information is available at the receiver.

One embodiment according to the present specification relates to a technique for transmitting a long training field (LTF) signal in a wireless LAN (WLAN) system. The LTF signal may comprise an LTF sequence transmitted on the basis of a plurality of subcarriers. For example, a minimum subcarrier index of a plurality of subcarriers may be set to −28, and a maximum subcarrier index of the plurality of subcarriers may be set to 28. A pilot tone may be inserted/allocated to four subcarriers from among a plurality of subcarriers.

A method by which a base station transmits a synchronization signal (SS) in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: generating an SS including a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); and transmitting the synchronization signal. A portion of the synchronization signal is transmitted in a region of a time interval corresponding to the cyclic prefix (CP) of the synchronization signal, and the portion of the synchronization signal includes the PSS and/or the SSS.

Aspects relate to transmission of a sounding reference signal (SRS). A scheduling entity such as a base station may configure the transmission of an SRS by a scheduled entity such as a user equipment (UE). In some aspects, this configuration may be based on the number of antenna ports that the UE will use to transmit the SRS. For example, the scheduling entity may specify that the scheduling entity is to use a first table or a second table to map transmission combs to the maximum number of cyclic shifts. In some aspects, the selection of the first table or the second table may be based on the number of antenna ports that the scheduled entity will use to transmit the SRS.

A terminal includes a reception unit that receives configuration information in a high frequency band higher than or equal to a frequency band of a frequency range 2 (FR2), the FR2 being in a range including a frequency range 1 (FR1) that is a low frequency band and the FR2 that is a high frequency band in a new radio (NR) system; and a control unit that configures at least one of a format of a random access preamble, a sequence of the random access preamble, or a subcarrier spacing applied to a channel on which the random access preamble is to be transmitted, wherein the at least one of the format, the sequence, or the subcarrier spacing is associated with an index included in the configuration information.

An apparatus for transmitting broadcasting signal using transmitter identification scaled by 4-bit injection level code and method using the same are disclosed. An apparatus for transmitting broadcasting signal according to an embodiment of the present invention includes a waveform generator configured to generate a host broadcasting signal; a transmitter identification signal generator configured to generate a transmitter identification signal for identifying a transmitter, the transmitter identification signal scaled by an injection level code; and a combiner configured to inject the transmitter identification signal into the host broadcasting signal in a time domain so that the transmitter identification signal is transmitted synchronously with the host broadcasting signal.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a receiving device may receive, from a first wireless communication device on a first communication channel, a first communication that is configured with at least one guard interval (GI) sequence of a first GI type. The receiving device may receive, from the first wireless communication device or a second wireless communication device on the first communication channel or a second communication channel, a second communication that is configured with at least one GI sequence of a second GI type. Numerous other aspects are described.

Methods and apparatuses for an interlace based resource pool sidelink (SL) in a wireless communication system. A method of a user equipment (UE) includes receiving a set of configurations and determining, from the set of configurations, a resource pool including a set of sub-channels. A sub-channel in the set of sub-channels includes a set of interlaces of resource blocks (RBs). An interlace in the set of interlaces includes RBs with a uniform interval of M RBs. The method further includes determining a set of resources within the resource pool allocated for a physical sidelink control channel (PSCCH) or a physical sidelink feedback channel (PSFCH) and transmitting, to another UE, the PSCCH or PSFCH based on the determined set of resources.