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.

A computer implemented method performed by a receiving node (110) in a wireless communications network (100), for detecting information in a first transmit signal (121) sent from a primary transmitting node (120) in the network, where the first transmit signal is comprised in a received signal (112). The received signal also comprises one or more interfering secondary transmit signals (131, 132). The method comprises determining a received signal quality associated with at least one of the secondary transmit signals (131, 132), obtaining a computer implemented classification model configured to classify a transmit signal (121, 131) into a successive interference cancelation, SIC, group based on the received signal quality, classifying the at least one secondary transmit signal (131, 132) using the classification model, and, if one or more of the secondary transmit signals are classified into the SIC group, detecting the information in the first transmit signal (121) based on a SIC information decoding strategy involving the one or more secondary transmit signals (131, 132) classified into the SIC group.

A method in a user equipment (605) is disclosed. The method comprises acquiring (704, 708) interference mitigation assistance parameters and granularity parameters, determining (712) one or more interfering cells (610B) for which a first strength measurement should be determined, determining (716) a first strength measurement for each of the determined one or more interfering cells, and ordering (720) the one or more interfering cells. The method further comprises identifying (724) from the ordered one or more interfering cells a first number of interfering cells having the strongest first strength measurements, determining (728) a second strength measurement for each of the identified first number of interfering cells, determining (732) one or more cells of the identified first number of interfering cells for which to perform cancellation of interference, and performing (736) cancellation of interference on the determined one or more cells of the identified first number of interfering cells.

A device, method, and program that can improve decoding precision of a desired signal in a case in which multiplexing/multiple access is performed using power allocation. The device includes a transmission processor configured to set each of transmission signal sequences of a plurality of power layers that are to be multiplexed using power allocation as a target and apply at least one of a scrambler using a scramble pattern and an interleaver using an interleave pattern corresponding to information regarding the power allocation.

A receiving device including a receiver configured to receive a communication signal (CS) in a current time frame, and a processor configured to determine a set of candidate Control Channels (CCHs), determine a decoding order for the candidate CCHs in the set, decode at least one candidate CCH in the set according to the decoding order, compute a possible Radio Network Temporary Identifier (RNTI) for the decoded candidate CCH, compute a metric value (MV) for the decoded candidate CCH, the MV provides an indication when the decoded candidate CCH might be an actual CCH, determine when the decoded candidate CCH is an actual CCH based on the computed possible RNTI and the MV, derive control information (CI) from the decoded candidate CCH when the decoded candidate CCH is determined as an actual CCH, and cancel or suppress interference in the CS based on the derived CI.

A method for scheduling a pilot signal, a control node and a wireless device are proposed. The control node manages an i-th cell among N cells of a network cluster. The method includes: dividing a training time into at least (N) time slots; scheduling a wireless device of the i-th cell to transmit a first pilot signal at a j-th time slot and a (j+1)-th time slot, or scheduling the wireless device of the i-th cell to transmit a second pilot signal at the j-th time slot and the (j+1)-th time slot; scheduling the wireless device to alternately transmit the first pilot signal and the second pilot signal at residual time slots other than the j-th time slot and the (j+1)-th time slot, wherein the first pilot signal and the second pilot signal have opposite signs.

Embodiments of the present invention provide a data communication method and a related device. The data communication method may include performing, by a first communications device, power adjustment on Q codebooks using Q power factors, to obtain power-adjusted Q codebooks, where Q is a positive integer, and the Q power factors and the Q codebooks are in a one-to-one correspondence and mapping, by the first communications device, Q to-be-transmitted bit sequences to Q codewords in the power-adjusted Q codebooks, where the Q bit sequences and the Q codewords are in a one-to-one correspondence. The method also includes obtaining, by the first communications device, a modulation symbol based on the Q codewords and sending, by the first communications device, the modulation symbol on a resource block.

A method for scheduling a pilot signal, a control node and a wireless device are proposed. The control node manages an i-th cell among N cells of a network cluster. The method includes: dividing a training time into at least (N) time slots; scheduling a wireless device of the i-th cell to transmit a first pilot signal at a j-th time slot and a (j+1)-th time slot, or scheduling the wireless device of the i-th cell to transmit a second pilot signal at the j-th time slot and the (j+1)-th time slot; scheduling the wireless device to alternately transmit the first pilot signal and the second pilot signal at residual time slots other than the j-th time slot and the (j+1)-th time slot, wherein the first pilot signal and the second pilot signal have opposite signs.

A user apparatus for use in a radio communication system, including: an successive interference cancelling reception unit configured to obtain a desired signal by successively canceling an interference signal that becomes interference to the desired signal from a received signal that the user apparatus receives; and an ordering determination unit configured to determine an order of interference signals to be successively canceled by the successive interference cancelling reception unit, wherein the ordering determination unit determines the order based on reception quality for each interference signal.

Network node and method in a network node, comprising: grouping a plurality of UEs into at least a first UE group and a second UE group; assigning a mutually orthogonal pilot sequence to each UE comprised in the first UE group; assigning a mutually orthogonal pilot sequence to each UE comprised in the second UE group; assigning a resource-offset to the UEs comprised in each UE group, by which each UE is allowed to start its transmission sub-frame in its Transmission Time Interval, TTI; and transmitting the assigned pilot sequences and the assigned resource-offset to UEs.