Abstract: Devices, methods and non-transitory computer-readable medium for adaptively selective retransmissions in wireless communications are disclosed. The present application allows enhancing short packet data retransmission performance under short delay constraints. Using a retransmission indication for at least one segment of consecutive forward error correction (FEC) encoded bits reduces feedback signaling overhead compared to signaling retransmission requests individually for each of the coded bits. Accordingly, active hybrid automatic repeat request (HARQ) transmissions with low amounts of feedback information are enabled.

Abstract: The invention relates to a transmitter device and a receiver device for efficient transmission of information messages. The transmitter device superposes a selected subset of columns of a projection matrix based on an information message so as to obtain a signal for transmission. The signal is transmitted to the receiver device. The receiver device performs iterative successive interference cancellation on a received signal based on a projection matrix so as to obtain a subset of the columns of the projection matrix and therefrom obtains a recovered information message based on the subset of the columns of the projection matrix. Thereby, it is provided a sparse superposition coding scheme with quasi-orthogonal projection matrix achieving good performance in respect of spectral efficiency. Furthermore, the invention also relates to corresponding methods and a computer program.

Abstract: A codeword bit interleaving scheme for multilayer transmissions in a wireless communication system. The codeword bit interleaving scheme involves dividing columns of an interleaving matrix into at least two disjoint column groups based on transmission qualities (e.g., SNRs) of data transmission layers (e.g., MIMO layers). The column groups are then filled with codeword bits, starting with writing information bits into the column group(s) corresponding to the high-quality data transmission layers. After that, the column groups are all merged to restore the initial column arrangement of the interleaving matrix, and the codeword bits are read from the interleaving matrix row-wise and mapped to modulation symbols. The modulation symbols are in turn mapped to the data transmission layers themselves.

Abstract: A first communication device and a second communication device for an iterative code design are provided. The first communication device generates and transmits sets of parity symbols and receives the transmitted sets of parity symbols from a second communication device. The sets of parity symbols are generated based on using a first generator device and based previously transmitted systematic symbols and computed noise values. The second communication device buffers received systematic symbols and sets of parity symbols and jointly decodes them. Thereby, an iterative code design is provided with improved performance. Furthermore, the disclosure also relates to corresponding methods and a computer program.

Abstract: A data processing method and a data processing apparatus are provided to reduce a bit error rate of a wireless communications system and improve transmission performance of the wireless communications system. The method includes: mapping L to-be-sent bits to L bit locations included in at least one modulation symbol, where the L to-be-sent bits include at least one bit field, a bit in a bit field having a high priority is preferentially mapped to a bit location that is of the at least one modulation symbol and that has a high reliability level, the at least one bit field is at least one of an information bit field, a first parity bit field, and a second parity bit field; and outputting the at least one modulation symbol.

Abstract: A transmitting device is described for a communication system. The transmitting device obtains an information message comprising information bits addressed for a receiving device and encodes the information message to obtain a codeword. The transmitting device rate-matches the codeword to produce a rate-matched codeword comprising systematic bits and parity-check bits. Furthermore, the transmitting device jointly interleaves the systematic bits and parity-check bits of the rate-matched codeword to obtain an interleaved codeword. The systematic bits of the interleaved codeword are mapped to modulation label positions of a modulation constellation with first reliabilities, and the parity-check bits of the interleaved codeword are mapped to modulation label positions of the modulation constellation with second reliabilities.

Abstract: A network node and a user device are provided. The network node comprises a processor to determine for each of the plurality of user devices a corresponding check element position of a corresponding check element in a control information message addressed to the user device; a transmitter to transmit a first control signal (CS1) to each of the plurality of user devices, the CS1 indicating the determined corresponding check element position. The user device comprising: a receiver to receive a CS1 indicating a corresponding check element position of a check element associated with the user device in a control information message (M), the control information message (M) comprising control information (d) and at least two check elements, a processor to derive the corresponding check element position of the check element associated with the user device from the CS1.

Abstract: The invention relates to a transmitter device and a receiver device for efficient transmission of information messages. The transmitter device superposes a selected subset of columns of a projection matrix based on an information message so as to obtain a signal for transmission. The signal is transmitted to the receiver device. The receiver device performs iterative successive interference cancellation on a received signal based on a projection matrix so as to obtain a subset of the columns of the projection matrix and therefrom obtains a recovered information message based on the subset of the columns of the projection matrix. Thereby, it is provided a sparse superposition coding scheme with quasi-orthogonal projection matrix achieving good performance in respect of spectral efficiency. Furthermore, the invention also relates to corresponding methods and a computer program.

Abstract: A transmitting device and a receiving device for reliable reception of control messages such as downlink control information is provided. The transmitting device forms a control message which comprises control information, a first CRC word (W1) and a second CRC word (W2). The control message is sent to the receiving device which obtains a first CRC check outcome based on performing a first CRC check on the control message, and a second CRC check outcome based on performing a second CRC check on the control message. Thereby, more reliable reception of control messages is possible. Furthermore, the present application also relates to corresponding methods and a computer program.

Abstract: Devices, methods and non-transitory computer-readable medium for adaptively selective retransmissions in wireless communications are disclosed. The present application allows enhancing short packet data retransmission performance under short delay constraints. Using a retransmission indication for at least one segment of consecutive forward error correction (FEC) encoded bits reduces feedback signaling overhead compared to signaling retransmission requests individually for each of the coded bits. Accordingly, active hybrid automatic repeat request (HARQ) transmissions with low amounts of feedback information are enabled.

Abstract: A data transmission and signaling method in a transmitter device configured for concurrent transmission of non-orthogonal independent downlink data streams to receiver devices in a wireless communication system is provided. The method comprises sending to all receiver devices control information that includes indices of receiver devices selected for transmission, code rates of selected receiver devices, a label bit-to-receiver device allocation, an index of an expanded constellation, and a number of resource elements used for transmission.

Abstract: A network node for a wireless communication system including a processor and a transceiver are provided. The processor is configured to determine that a first channel quality indication for a first user equipment is higher than a second channel quality indication for a second user equipment, determine a first modulation and coding scheme index (IMCS,N) for the first user equipment based on a first set of modulation and coding schemes. The first set of modulation and coding schemes includes a first range of transport block sizes [n0 . . . n1] mapped to a first modulation order Qm=q0, and at least a second range of transport block sizes [n2 . . . n3] mapped to a second modulation order Qm=q1, where q1>q0, and n3>=n1 and n2<n1.

Abstract: The embodiments of the present invention relates to a transmitting device and to a receiving device. The transmitting device has a processor to obtain a first sequence of bits comprising first control information addressed for at least one receiving device, obtain a second sequence of bits comprising first data information addressed for the at least one receiving device, superpose the first sequence of bits and the second sequence of bits into a first superposed sequence of symbols; a transmitter to transmit the first superposed sequence of symbols in a radio resource. The receiving device has a receiver to receive a first superposed sequence of symbols comprising: a first sequence of bits comprising first control information and a second sequence of bits comprising first data information; a processor to decode the first superposed sequence of symbols so as to obtain the first sequence of bits.

Abstract: A data processing method and a data processing apparatus are provided to reduce a bit error rate of a wireless communications system and improve transmission performance of the wireless communications system. The method includes: mapping L to-be-sent bits to L bit locations included in at least one modulation symbol, where the L to-be-sent bits include at least one bit field, a bit in a bit field having a high priority is preferentially mapped to a bit location that is of the at least one modulation symbol and that has a high reliability level, the at least one bit field is at least one of an information bit field, a first parity bit field, and a second parity bit field; and outputting the at least one modulation symbol.

Abstract: A transmitting device is described for a communication system. The transmitting device obtains an information message comprising information bits addressed for a receiving device and encodes the information message to obtain a codeword. The transmitting device rate-matches the codeword to produce a rate-matched codeword comprising systematic bits and parity-check bits. Furthermore, the transmitting device jointly interleaves the systematic bits and parity-check bits of the rate-matched codeword to obtain an interleaved codeword. The systematic bits of the interleaved codeword are mapped to modulation label positions of a modulation constellation with first reliabilities, and the parity-check bits of the interleaved codeword are mapped to modulation label positions of the modulation constellation with second reliabilities.

Abstract: An embodiment encoder device for encoding an information word c=[c0, c1, . . . , cK-1] having K information bits, ci, includes an encoder for a tail biting convolutional code having a constraint length, L, where K<L?1; the encoder being configured to receive the K information bits; and encode the K information bits so as to provide an encoded code word. An embodiment decoder device for determining an information word c=[c0, c1, . . . , cK-1], having K information bits, ci, includes a decoder for a tail biting convolutional code having a constraint length, L, where K<L?1; the decoder being configured to: receive an input sequence; compute at least one reliability parameter based on the received input sequence; and determine an information word c based on the at least one reliability parameter.

Abstract: The present application relates to a baseband processor, comprising a receiver circuit configured to receive a downlink carrier aggregation transmission, wherein the baseband processor further comprises an encoder configured to generate a Cyclic Redundancy Check (CRC) code word based on at least one Hybrid Automatic Repeat Request-Acknowledgment (HARQ-ACK) feedback bit in response to the downlink carrier aggregation transmission, jointly encode at least one radio network parameter (P) of a user device with the CRC code word, and generate an uplink control information message (M) comprising the at least one HARQ-ACK feedback bit and the jointly encoded radio network parameter and CRC code word. Furthermore, the present application also relates to corresponding methods, a wireless communication system, a computer program, and a computer program product.

Abstract: A network node and a user device are provided. The network node comprising: a processor configured to: generate a check element for each user device in a group of user devices; a transmitter configured to: transmit the control information message to the group of user devices. The user device comprising: a receiver configured to: receive a control information message addressed for a group of user devices; a processor configured to: perform a redundancy check on the control information message; derive the control information from the control information message and discard check elements of other user devices upon a positive redundancy check; communicate in the wireless communication system based on the derived control information. Furthermore, the present invention also relates to corresponding methods, a computer program, and a computer program product.

Abstract: A transmitter apparatus in a wireless communication system that includes a processor. In one embodiment, the processor is configured to receive at least one modulated data message and spread the at least one modulated data message into a transmission signal using a low density signature matrix. The low density signature matrix is a cycle-free signature matrix. A receiver apparatus is configured to receive the transmission signal and detect within the received transmission signal at least one modulated data message. The processor is configured to detect the at least one modulated data message in one iteration using the cycle-free signature matrix.

Abstract: The embodiments of the present invention relates to a transmitting device and to a receiving device. The transmitting device has a processor to obtain a first sequence of bits comprising first control information addressed for at least one receiving device, obtain a second sequence of bits comprising first data information addressed for the at least one receiving device, superpose the first sequence of bits and the second sequence of bits into a first superposed sequence of symbols; a transmitter to transmit the first superposed sequence of symbols in a radio resource. The receiving device has a receiver to receive a first superposed sequence of symbols comprising: a first sequence of bits comprising first control information and a second sequence of bits comprising first data information; a processor to decode the first superposed sequence of symbols so as to obtain the first sequence of bits.