Aspects of the present disclosure provide techniques for transmitting, receiving, and processing multi-user multiple input multiple output (MU-MIMO) signals for heterogeneous numerology systems. An exemplary method performed, for example, by a scheduling entity generally includes signaling an indication of numerology parameters to be used in transmitting first and second multi-user multiple input multiple output (MU-MIMO) signals to first and second user equipments (UEs) using shared resources and transmitting the first and second MU-MIMO signals to the first and second UEs, in accordance with the numerology parameters.

Example data transmission methods and apparatus are described. One example method includes obtaining at least two signature sequences used to perform multiple access for at least two to-be-sent data packets by a user equipment. The user equipment processes the at least two data packets by respectively using corresponding signature sequences, to obtain at least two transmit sequences. The user equipment sends the at least two transmit sequences to a network device on a same time-frequency resource. Then the network device obtains the at least two signature sequences used by the user equipment to send the at least two transmit sequences, and separately detects a corresponding transmit sequence based on each signature sequence, to obtain the at least two data packets. The user equipment can transmit a plurality of data packets on a same time-frequency resource in a same slot.

A variable-length coding method to improve the performance of downlink NOMA. Depending on the channel conditions and the amount of data waiting to be transmitted the UEs served by the NN, the NN groups UEs (e.g., pairs two UEs) with appropriate channel qualities and adapts the transmission powers in different sub-codewords as well as the codeword length such that the UEs minimum quality-of-service requirements are satisfied. This makes it possible to improve the UEs/network achievable rates and the NN energy efficiency.

The present invention relates to a technique of improving, when performing synchronization between a transmitting device and a receiving device communicating on the basis of a beamforming technique, an overall beamforming synchronization performance by enabling fast beam tracking in a receiving device.

Embodiments of this application provide a data transmission method, a network device, and a terminal device. The method includes: determining, by a network device, demodulation reference signal DMRS port groups, where a quantity of the DMRS port groups is greater than or equal to 2; and further, communicating, by the network device, data with a terminal device, where the data is corresponding to a transport block, the transport block is divided into at least one code block group CBG, and each of the at least one CBG is corresponding to one DMRS port group and is mapped to a transport layer corresponding to the one DMRS port group.

The present disclosure discloses a method and a system for providing a code cover to Orthogonal Frequency Division Multiplexing (OFDM) symbols in a multiple user system. A data sequence is received from each of a plurality of users. Further, a reference sequence is generated for the data sequence of each of the plurality of users. Each of the reference sequence is multiplied with a code cover which are orthogonal to each other. Each of the reference sequence is time-multiplexed with corresponding data sequence, to generate a corresponding multiplexed sequence. Further, a Discrete Fourier Transform (DFT) is performed on each of the multiplexed sequence to generate a corresponding DFT-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) symbol. Lastly, the corresponding DFT-s-OFDM symbol is processed for transmitting over corresponding one or more channels.

A method of mitigating interference in a wireless signal of interest (SOI) received on an active frequency channel due to a common template multi-channel jamming attack includes selecting at least one reference channel from among a plurality of monitored frequency channels in which correlated jamming patterns are present without the SOI. The method further includes generating a plurality of weights according to data obtained from the active and reference channels, and applying an adaptive digital filter to the active channel according to the generated weights. The monitored frequency channels can be centered about the active frequency channel. The selection of reference channels can be varied and optimized. The data from each reference channel can be used to create a single virtual antenna tap or a plurality thereof. Assignment of the active channel can be time-varied to match a hopping pattern of a frequency hopping SOI.

A receiver in the present disclosure includes: a first input end, N first output ends, N baseband signal recovery modules, and a multiple-input multiple-output equalization module. Each baseband signal recovery module includes two second output ends; one second output end of each baseband signal recovery module is configured to output a baseband signal; and the other second output end is configured to output data enabling control information. The multiple-input multiple-output equalization module is configured to: control, based on N pieces of data enabling control information, a time sequence of N baseband signals entering the multiple-input multiple-output equalization module for equalization filtering processing, and perform equalization filtering processing on the N baseband signals by using N transmitters as references to obtain recovered data of the N transmitters. According to the embodiments of the present disclosure, asynchronous multi-transmitter data is received.

The present disclosure provides an electronic device and a method for wireless communications. The electronic device comprises a processing circuit. The processing circuit is configured to: for each candidate resource block, obtain a first receiving signal for a pilot symbol that is measured by the base station in a condition in which a D2D communication group does not perform D2D communication; receive obtaining a second receiving signal for a pilot symbol that is measured by the corresponding cellular user equipment in a condition in which the D2D communication group performs D2D communication; remove the impact of the first receiving signal from the second receiving signal, to serve as an interference signal received by the cellular user equipment from a D2D transmission device of the D2D communication group; and determine a priority order of resource blocks available to the D2D communication group by using interference minimization as an optimization objective.

There is provided mechanisms for beamformed reception of downlink reference signals. A method is performed by a terminal device. The method comprises obtaining direction-wise measurements of interference experienced by the terminal device. The method comprises generating, based on the direction-wise measurements of interference, a beam having a beam gain that is lower in those directions where a first interference level is experienced than in those directions where a second interference level is experienced, where the first interference level is higher than the second interference level. The method comprises receiving, using the generated beam, downlink reference signals from a network node.