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.

This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to tone mapping techniques and packet designs that support duplicate (or DUP mode) transmissions to multiple users. In some implementations, an access point (AP) may transmit a PPDU that includes first user data and second user data, where at least the first user data is transmitted in a DUP mode. As such, the first user data may be mapped to a number (N) of tones spanning a first RU in accordance with a dual carrier modulation (DCM) scheme, and a duplicate copy of the first user data may be mapped to N tones spanning a second RU in accordance with the DCM scheme. In some implementations, the second user data also may be transmitted in a DUP mode.

A user equipment (UE) is provided. The UE includes processing circuitry configured to rotate a symbol of a plurality of symbols for transmission. An amount of rotation of the symbol of the plurality of symbols is based on at least one of a cyclic prefix length of the symbol of the plurality of symbols and position of a subcarrier on which the symbol of the plurality of symbols is to be transmitted. The UE includes a transmitter configured to cause transmission of the plurality of symbols.

A method of wireless communication by a user equipment includes determining an allocation of a set of tones in a symbol for conveying data. The method further includes determining to use m-ary phase shift keying (MPSK) to modulate the data onto a subset of tones of the set of tones. The method further includes modulating the data onto the subset of tones based on a mapping, wherein the mapping maps pairs of data values with a largest Hamming distance from each other to pairs of constellation points with a maximum Euclidean distance from each other.

A method for operating a transceiver includes generating, by the transceiver, a first signal that includes an estimate of an interference signal leaked from a transmit path to a receive path of the transceiver. Generating the first signal includes obtaining a baseband transmit signal that includes a baseband of a transmit signal transmitted via the transmit path. Generating the first signal also includes calculating a harmonic phase that includes a phase of a harmonic of the baseband transmit signal. Generating the first signal also includes estimating a phase shift in accordance with an envelope of the baseband transmit signal. Generating the first signal also includes determining a phase of the first signal in accordance with the estimated phase shift and the calculated harmonic phase such that interference of a receive signal received via the receive path is reduced according to the first signal.

A user equipment (UE) is provided. The UE includes processing circuitry configured to rotate a symbol of a plurality of symbols for transmission. An amount of rotation of the symbol of the plurality of symbols is based on at least one of a cyclic prefix length of the symbol of the plurality of symbols and position of a subcarrier on which the symbol of the plurality of symbols is to be transmitted. The UE includes a transmitter configured to cause transmission of the plurality of symbols.

A method for operating a transceiver includes generating, by the transceiver, a first signal that includes an estimate of an interference signal leaked from a transmit path to a receive path of the transceiver. Generating the first signal includes obtaining a baseband transmit signal that includes a baseband of a transmit signal transmitted via the transmit path. Generating the first signal also includes calculating a harmonic phase that includes a phase of a harmonic of the baseband transmit signal. Generating the first signal also includes estimating a phase shift in accordance with an envelope of the baseband transmit signal. Generating the first signal also includes determining a phase of the first signal in accordance with the estimated phase shift and the calculated harmonic phase such that interference of a receive signal received via the receive path is reduced according to the first signal.

This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to tone mapping techniques and packet designs that support duplicate (or DUP mode) transmissions to multiple users. In some implementations, an access point (AP) may transmit a PPDU that includes first user data and second user data, where at least the first user data is transmitted in a DUP mode. As such, the first user data may be mapped to a number (N) of tones spanning a first RU in accordance with a dual carrier modulation (DCM) scheme, and a duplicate copy of the first user data may be mapped to N tones spanning a second RU in accordance with the DCM scheme. In some implementations, the second user data also may be transmitted in a DUP mode.

Disclosed is a method of operating an electronic device which communicates with an external electronic device. The method includes loading first user data including at least one first condition bit, first valid bits, and second valid bits, generating first and second intermediate data based on the first user data with reference to a target conversion rule of a conversion table of the electronic device, which corresponds to the at least one first condition bit, a sum of a first power value corresponding to the first intermediate data and a second power value corresponding to the second intermediate data being less than or equal to a power threshold value, generating first symbol data by performing first encoding on the first intermediate data, generating second symbol data by performing second encoding on the second intermediate data, and providing first encoded data including the first symbol data and the second symbol data.

This document discloses a solution for modulating and demodulating signals transferred over a communication channel. According to an aspect, a method comprises: storing a database for mapping rules for mapping a block of N bits into M modulation symbol phase transitions, wherein a phase transition between consecutive modulation symbols is limited to less than or equal to /2, wherein M is smaller than N, and wherein M is the smallest number required for realizing 2N different phase-transition combinations; determining an initial phase; acquiring a block of N bits and modulating the block of N bits into M phase symbol transitions from the initial phase by using bit values of the block of N bits and the mapping rules, thus acquiring M modulation symbols; performing said determining, acquiring, and modulating for further blocks of N bits, thus acquiring a sequence of K modulation symbols; allocating the sequence of K modulation symbols to sub-carriers of a multi-carrier symbol and causing transmission of the multi-carrier symbol over a radio interface.