Abstract: Various solutions with respect to codebook-based uplink transmission in wireless communications are described. A user equipment (UE) receives a signal indicating codebook subset restriction (CBSR) from a network node of a wireless network. The UE selects one or more codewords or a codebook from a master codebook based on the CBSR. The master codebook includes codewords from multiple components. The UE then performs a physical uplink shared channel (PUSCH) transmission to the network node using the one or more codewords or the codebook.

Abstract: Various solutions for blind retransmission for ultra-reliable and low-latency communications (URLLC) with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive a physical downlink control channel (PDCCH). The apparatus may receive a plurality of physical downlink shared channels (PDSCHs) according to the PDCCH. The apparatus may decode the plurality of PDSCHs according to the PDCCH. The PDCCH may schedule the plurality of PDSCHs.

Abstract: A method of interference cancellation is proposed. A UE obtains configuration information of a data transmission from a neighboring cell via an interference channel in a mobile communication network. The UE receives radio signals on a set of data resource elements as determined based on the obtained configuration information. The UE then estimates the interference channel corresponding to the data transmission from the neighboring cell based on the received radio signals on the set of data resource elements. Finally, the UE cancels the data transmission from the neighboring cell based on the estimated interference channel.

Abstract: A method of wireless communication of a UE is provided. The UE determines a reference size of a payload available in a physical uplink channel for carrying R channel state information (CSI) reports, R being an integer greater than 0, each of the R CSI reports including a first part containing CSI of a wideband and a second part containing CSI of one or more subbands of the wideband. The UE carries all first parts of the R CSI reports in the payload. The UE further carries second parts of (M?1) CSI reports of the R CSI reports in the payload. The UE carries a portion of a second part of an Mth CSI report of the R CSI reports in the payload.

Abstract: Techniques and examples pertaining to uplink (UL) transmission in mobile communications are described. A processor of an apparatus having a plurality of antenna ports controls a plurality of amplifiers each of which corresponding to a respective antenna port of the plurality of antenna ports that correspond to a plurality of antennas. The processor transmits a reference signal to a network via the plurality of antenna ports. The processor also transmits data through a physical uplink shared channel (PUSCH) to the network via the plurality of antenna ports. The processor controls output powers of the plurality of power amplifiers such that, for at least a first antenna of the plurality of antennas, an amount of power used by the first antenna in transmitting the data and another amount of power used by the first antenna in transmitting the reference signal are equal.

Abstract: Techniques and examples pertaining to codeword mapping in New Radio (NR) and interleaver design for NR are described. A processor of an apparatus receives, via a transceiver of the apparatus, a Physical Downlink Shared Channel (PDSCH) transmission from a network node of a wireless network. The processor maps one or more codeblocks of a codeword in the PDSCH transmission to a spatial layer group which is a subset of a plurality of spatial layers. The processor also performs receive processing for one or more codeblocks in the PDSCH transmission including by performing de-interleaving on a result from a channel interleaver or from an intra-codeblock interleaver that performs pseudo-random interleaving on systematic bits and parity bits of the one or more codeblocks and channel decoding. The processor transmits, via the transceiver, to the network node a feedback concerning the one or more codeblock and reporting a result of the channel estimation.

Abstract: Techniques and examples pertaining to linear combination codebook design and channel state information (CSI) feedback in mobile communications are described. Frequency-dependent parameterization is supported to reduce signaling overhead in reporting beam selection and to enhance CSI resolution. Additionally, the number of candidates for beam selection depends on the strength of each beam to be selected such that more candidates are considered for a stronger beam than for a weaker beam. Moreover, amplitude quantization and/or phase quantization for beams of different strengths are different to reduce quantization error.

Abstract: The techniques described herein relate to methods, apparatus, and computer readable media configured to provide for wireless techniques related to channel reciprocity. A channel estimation process between a mobile device and a base station is configured. The channel estimation process includes estimating a set of channel characteristics for an uplink direction of the wireless communication channel based on signals transmitted by the mobile device over the first set of antennas, and receiving a report associated with a set of channel characteristics for a downlink direction of the wireless communication channel from the mobile device, wherein the mobile device generates the report based on the estimated set of channel characteristics for the downlink direction of the wireless communication channel corresponding to the first set of antennas.

Abstract: Techniques and examples of overhead reduction for linear combination codebook and feedback mechanism in mobile communications are described. A user equipment (UE) receives from a base station of a network one or more reference signals via a communication link between the UE and the base station. The UE constructs a channel state information (CSI) feedback by utilizing a correlation of channel responses in a frequency domain to reduce feedback overhead. The UE then transmits the CSI feedback to the base station.

Abstract: A method of interference cancellation is proposed. A UE obtains configuration information of a data transmission from a neighboring cell via an interference channel in a mobile communication network. The UE receives radio signals on a set of data resource elements as determined based on the obtained configuration information. The UE then estimates the interference channel corresponding to the data transmission from the neighboring cell based on the received radio signals on the set of data resource elements. Finally, the UE cancels the data transmission from the neighboring cell based on the estimated interference channel.

Abstract: A method of interference cancellation is proposed. A UE obtains configuration information of a data transmission from a neighboring cell via an interference channel in a mobile communication network. The UE receives radio signals on a set of data resource elements as determined based on the obtained configuration information. The UE then estimates the interference channel corresponding to the data transmission from the neighboring cell based on the received radio signals on the set of data resource elements. Finally, the UE cancels the data transmission from the neighboring cell based on the estimated interference channel.

Abstract: A method of interference cancellation is proposed. A UE obtains configuration information of a data transmission from a neighboring cell via an interference channel in a mobile communication network. The UE receives radio signals on a set of data resource elements as determined based on the obtained configuration information. The UE then estimates the interference channel corresponding to the data transmission from the neighboring cell based on the received radio signals on the set of data resource elements. Finally, the UE cancels the data transmission from the neighboring cell based on the estimated interference channel.

Abstract: Techniques and examples of layer mapping, channel state information (CSI) feedback and hybrid automatic repeat request (HARQ) feedback in mobile communications are described. A user equipment (UE) receives from a base station one or more reference signals, which may be non-zero power (NZP) or zero power (ZP), on one or more time-frequency resources indicated by a network via a communication link between the UE and the base station. The UE estimates, based on the receiving, a subspace spanned by a channel response of an interfering signal. The UE determines a precoding matrix indicator (PMI) based on the estimated subspace. The UE transmits to the base station a channel state information (CSI) feedback comprising at least the PMI. The PMI may include at least a first precoder and a second precoder.

Abstract: A new air interface that is interference cancellation friendly is proposed. In one novel aspect, a novel code rate assignment with rate splitting is proposed. In one embodiment, a base station decomposes a codeword {x1} into two codewords {x1a} and {x1b}. The two codewords are applied with different code rates and/or modulation orders. More specifically, the code rate or modulation order of codeword {x1a} is set appropriately so that a victim UE can decode and cancel {x1a} under the channel quality of the victim UE. Typically, the channel quality of a victim UE is poorer than the channel quality of the intended UE. As a result, the MCS for {x1a} can be lower than the MCS for {x1b} such that the victim UE is able to apply CWIC to decode and cancel {x1a}.

Abstract: Various solutions for downlink control signal design with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive a first downlink control signal from a first source. The apparatus may receive a second downlink control signal from a second source. The apparatus may further receive downlink data according to the first downlink control signal and the second downlink control signal. The first downlink control signal and the second downlink control signal may be identical. The first source and the second source may be different.

Abstract: A user equipment (UE) utilizes a first group of antenna ports at the UE for transmitting and receiving while utilizing a second group of antenna ports for receiving but not transmitting. The UE transmits to a base station (BS) a sounding reference signal (SRS) via the first group of antenna ports through a first channel of a communication link between the UE and the BS. The UE receives from the BS a channel state information reference signal (CSI-RS) via the first and second groups of antenna ports through the first channel and a second channel of the communication link. The UE determines an estimated channel response and a matrix such that a product of the matrix and a channel response of the first channel approximates a channel response of the second channel. The UE transmits to the BS a CSI feedback indicating at least the matrix.

Abstract: Techniques, schemes and examples pertaining to using even-length sequence for synchronization and device identification in wireless communications are described. A processor of an apparatus can generate a signal containing at least an even-length Zadoff-Chu (ZC) sequence and transmit the signal to a receiving device. The even-length ZC sequence identifies the apparatus, carries information for signaling, or functions in time-frequency synchronization. The processor can also receive a signal containing at least an even-length ZC sequence and detect the even-length ZC sequence in the received signal.

Abstract: A method of performing downlink multiuser superposition transmission (MUST) with enhanced channel state information (CSI) feedback is proposed. When a user equipment (UE) reports CQI/SINR feedback for RI=RANK-2, the UE also reports a single beam CQI/SINR feedback for RI=RANK1. As a result, the scheduling base station can calculate the actual SINRs based on different MUST scenarios and thereby determining appropriate modulation and coding scheme (MCS) for the UE. Furthermore, if the granularity of the CQI table cannot reflect the high values of the single beam SINR, then a predefined scaling factor (0<?<1) known to both the base station and the UE may be applied.

Abstract: A method of modulating and demodulating superposed signals for MUST scheme is proposed. A transmitter takes bit sequences intended for multiple receivers under MUST scheme to go through a “bit sequence to constellation points” mapper before entering the modulators to satisfy the Gray coding rule and to achieve high demodulation performance for the receivers. In a first method, each bit sequence is assigned for each constellation point on the constellation map to satisfy one or more conditions under different power split factors. In a second method, the constellation map is divided into sub-regions according to the clustering of the constellation points for bit sequence assignment. A near-UE may use an ML receiver for demodulation and decoding the superposed signal. A far-UE may use an ML receiver or an MMSE receiver for demodulation and decoding the superposed signal.

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE determines a plurality of messages containing channel state information to be reported to a base station. The UE also determines a priority level for each of the plurality of messages based on at least one predetermined rule. The UE further selects one or more messages from the plurality of messages based on priority levels of the plurality of messages. The UE then sends the selected one or more messages to the base station.