A periodic phase modulation, having a period shorter than a symbol period, is applied as a source modulation, in addition to a symbol modulation, to signals transmitted between a transmitter and a receiver in a communication network. Symbol value elements can be sent from multiple transmitters (203, 303, 603, 703) to a receiver (607, 207) in the same symbol period can be processed on the basis of the source modulation without destructive interference. In some embodiments, the symbol value elements sent by different transmitters can be combined in the receiver. In some embodiments, symbol value elements sent by different transmitters can be distinguished in the receiver.

A digital transmitter architecture is disclosed to transmit (TX) multi-gigabit per second data signals on single carriers (SC) or orthogonal frequency division multiplexing (OFDM) carriers at millimeter wave frequencies in either one of a high-resolution modulation mode or a spectral shaping mode. The architecture includes a number of digital power amplifier (DPA) and modulation reconfigurable circuit segments to process individual bits of a data bit stream in parallel according to a specific circuit configuration corresponding to the selected TX mode using a multiplexer to switch between configurations.

A digital radio-frequency (RF) circuitry is disclosed. In one aspect, the circuitry includes a digitally controlled amplifier configured to receive an RF input signal and a digital control signal, and to output an amplitude controlled output signal. The digitally controlled amplifier includes one or more common-source amplifying unit cells. A respective common-source amplifying unit cell includes a sources node connected to a switching circuitry controllable by the digital control signal so as to activate or deactivate the common-source amplifying unit cell. The switching circuitry comprises a first switch configured to connect the source node with a first power supply node and a second switch configured to connect the source node with a second power supply node when activating and deactivating, respectively, the common-source amplifying unit cell.

Examples herein disclose apparatus and systems for hybrid vector based polar modulator schemes that may use a series of polar modulators to create a system of vector modulators. The resulting polar response may be de-composed into the sum of the polar modulators. This approach allows accurate phase modulation in two such links without the need for high resolution AM part to cover the IQ plane of a QAM modulator.

Technology for a user equipment (UE), configured for coverage enhanced (CE) machine type communication (MTC) is disclosed. The UE can encode, at the UE, a UE capability message for transmission to a next generation node B (gNB) or evolved Node B (eNB), wherein the UE capability message includes a capability to support communication using a modulation and coding scheme (MCS) that includes 64 quadrature amplitude modulation (QAM). The UE can decode, at the UE, a higher layer signaling message to configure the UE to operate in a CE mode A. The UE can decode, at the UE, data received in a physical downlink shared channel (PDSCH) transmission to the UE that is modulated using a 64 QAM.

The radio communication device according to the present invention comprises: a baseband/intermediate frequency band unit that quadrature-modulates an in-phase component and a quadrature component of a digital baseband signal, converts the digital baseband signal into an analog intermediate frequency signal, and outputs the analog intermediate frequency signal; and a radio frequency band unit that generates a radio frequency signal by frequency-converting the analog intermediate frequency signal from the baseband/intermediate frequency band unit, amplifies the generated radio frequency signal, and transmits the amplified radio frequency signal. The baseband/intermediate frequency band unit further includes an analog correction filter that corrects the in-phase component and the quadrature component of the digital baseband signal, based on phase information on an analog filter in the baseband/intermediate frequency band unit and phase information on an analog filter in the radio frequency band unit.

The radio communication device according to the present invention comprises: a baseband/intermediate frequency band unit that quadrature-modulates an in-phase component and a quadrature component of a digital baseband signal, converts the digital baseband signal into an analog intermediate frequency signal, and outputs the analog intermediate frequency signal; and a radio frequency band unit that generates a radio frequency signal by frequency-converting the analog intermediate frequency signal from the baseband/intermediate frequency band unit, amplifies the generated radio frequency signal, and transmits the amplified radio frequency signal. The baseband/intermediate frequency band unit further includes an analog correction filter that corrects the in-phase component and the quadrature component of the digital baseband signal, based on phase information on an analog filter in the baseband/intermediate frequency band unit and phase information on an analog filter in the radio frequency band unit.

Provided are a data processing method and device. The method may include: generating first data, wherein generating the first data comprises one of: performing differential encoding on second data to generate third data, and processing the third data by using a sequence to generate the first data; processing the second data by using a sequence to generate fourth data, and performing differential encoding on the fourth data to generate the first data; and processing the second data by using a sequence to generate the first data.

The present disclosure relates to a polar phase or frequency modulator comprising: a normalized delay circuit (602) configured to delay edges of an input carrier signal (CLK_IN) based on normalized delay control values (i) to generate a modulated output signal (RF_OUT); and a normalized delay calculator (604) configured to receive the modulated output signal (RF_OUT) and to generate the normalized delay control values (i).

Embodiments of this application provide a non-coherent data transmission method and a communication apparatus. In the method, a transmit end device determines, in a first constellation, a first constellation point corresponding to first to-be-modulated bits, where the first constellation point corresponds to P first symbols, P=M*N, M is a positive integer, and N is an integer greater than 1; and sends the P first symbols on N resource units by using M antenna ports, or sends P second symbols determined based on the P first symbols, and foregoes sending demodulation reference signals of the P first symbols or the P second symbols. In the method, a constellation is designed, and each constellation point in the constellation corresponds to a plurality of resource units so that data can be transmitted with no need to transmit a reference signal, and only the data needs to be transmitted.