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 method of modulating a series of input digital symbols of a first modulation scheme is provided. The method is implemented by a transmitter and includes receiving a sequential series of samples of the digital symbols in a first domain of the first modulation scheme. The first domain is one of the time domain and the frequency domain. The method further includes determining a dual of the first modulation scheme. The dual has a second modulation scheme in a second domain that is different from the first domain the second domain is the other of the time domain and the frequency domain. The method further includes applying a 90 degree rotational operation to the second modulation scheme to generate a rotational modulation format, modulating the series of digital symbols with the generated rotational modulation format, and outputting the modulated series of digital symbols to a receiver.

Abstract: A common information transmission method and an apparatus relate to the communications field, and to reduce repeated sending of common information from a base station to a plurality of user equipments (UEs) during sending of the common information, and improve utilization of resources between the base station and the UEs. The method includes obtaining, by UE, frequency domain location information of a first transmission bandwidth, determining, by the UE, a size and a location of the first transmission bandwidth in a bandwidth of the UE according to the frequency domain location information, where the bandwidth of the UE is one of system bandwidths, and receiving, by the UE over the first transmission bandwidth according to the size and the location of the first transmission bandwidth, common information sent by a base station.

Abstract: A computing device (such as a computer gaming console) uses only a single radio to concurrently communicate with a wireless network access point and wireless client devices such as game controllers or peripherals. To establish and maintain both a high-throughput link with the access point, and a low-latency link with the client device(s), the single Wi-Fi radio of the computing device is configured to periodically switch between a channel used for the high-throughput link and a different channel that is used for the low-latency link—thus implementing a combination of frequency division multiplexing (FDM) and time division multiplexing (TDM). The console may use aspects of the Wi-Fi protocol standard to ensure that periodically switching its single radio between the two channels is accomplished while maintaining reliable communication on both channels.

Abstract: There is disclosed a method of operating a receiving radio node in a wireless communication network. The method includes receiving first signaling, the first signaling covering at least one allocation unit carrying Demodulation Reference Signaling, DMRS. Receiving includes performing Inter Carrier Interference, ICI, suppression for the at least one allocation unit carrying DMRS based on received DMRS. The disclosure also pertains to related devices and methods.

Abstract: A wearable device capable of synchronizing a plurality of wearable devices using body conductivity is provided. The wearable device includes a clock generator configured to generate a clock signal, a signal generator configured to generate a first synchronization signal based on the clock signal, an electrode configured to transmit and receive an electrical signal through a body while contacting the body, a switch configured to connect the signal generator and the electrode or block a connection between the signal generator and the electrode, and at least one processor configured to control the switch to connect the signal generator and the electrode for transmitting the first synchronization signal generated in the signal generator to the electrode in a master mode, and control the switch to block the connection between the signal generator and the electrode in a slave mode.

Abstract: A method and apparatus are provided for setting a plurality of demodulation reference signal (DMRS) structures and determining uplink and downlink transmission timing for reducing a delay. A method performed by a terminal includes receiving, from a base station, information associated with a first symbol position for a demodulation reference signal (DMRS) in a transmission time interval; identifying the first symbol position for the DMRS, the first symbol position for the DMRS being identified relative to a start of the transmission time interval based on the information; and receiving, from the base station, the DMRS on the identified first symbol position of the DMRS.

Abstract: Modulation schemes for 5G and 6G are disclosed that can be demodulated accurately even when two transmissions collide. The modulation states are configured to reveal the interference and, in most cases, provide an unambiguous determination of the original content. In other cases, when inevitable ambiguities remain, the number of possible states is greatly reduced, enabling rapid selection of the correct state using error-detection codes. The states of the modulation scheme may include phase modulation or amplitude modulation or both, and may be based on classical amplitude-phase modulation or pulse-amplitude modulation. Each state is structured so that any collision, between any two of the states, produces a readily identified amplitude-phase combination, from which the original message and the intruding message can be deduced. Enhanced network throughput and reliability, with fewer retransmission and dropped messages, may result. Many other aspects are disclosed.

Abstract: Faulted messages in 5G or 6G are generally discarded and a retransmission is then requested. However, the faulted message contains valuable information despite the few faulted message elements. Retransmission is a time-consuming energy-intensive process. Therefore, the present disclosure pertains to procedures for determining which specific message elements, of a corrupted message, are actually faulted. To do so, the receiver can determine a modulation quality of each message element by measuring a difference between the amplitude levels of the message element and the predetermined amplitude levels of the modulation scheme. For example, the modulation scheme may involve an I-branch and an orthogonal Q-branch, each with a different amplitude. The message quality may be related to the deviation of each branch amplitude from the closest predetermined amplitude level of the modulation scheme. A large amplitude deviation indicates a suspicious message element. Many other aspects are also disclosed.

Abstract: An on-board device is configured for reading a telegram of a balise installed at a point along a route followed by a guided vehicle in which the on-board device is to be installed. The on-board device includes a receiver having an antenna for picking up the telegram transmitted by the balise and delivering a reception signal to a processing unit. The processing unit is configured for processing the reception signal in order to read the telegram sent by the balise. A test component is configured for adding a test signal to the reception signal before its processing by the processing unit. The test signal is configured to act as a noise for limiting a sensitivity of the receiver, making it therefore impossible to read a cross-talk signal. A method for protecting the on-board device from cross-talk is also provided.

Abstract: Systems and methods for obtaining optimal mother wavelets for facilitating machine learning tasks. The traditional systems and methods provide for selecting a mother wavelet and signal classification using some traditional techniques and methods but none them provide for selecting an optimal mother wavelet to facilitate machine learning tasks. Embodiments of the present disclosure provide for obtaining an optimal mother wavelet to facilitate machine learning tasks by computing values of energy and entropy based upon labelled datasets and a probable set of mother wavelets, computing values of centroids and standard deviations based upon the values of energy and entropy, computing a set of distance values and normalizing the set of distance values and obtaining the optimal mother wavelet based upon the set of distance values for performing a wavelet transform and further facilitating machine learning tasks by classifying or regressing, a new set of signal classes, corresponding to a new set of signals.

Abstract: In a communication method to communicate between an access point (AP) and first and second communication stations (STAs) can include calculating joint transmission information based on the first and the second STAs, establishing an uplink communication between the AP and the first STA; and establishing a downlink communication between the AP and the second STA jointly with the uplink communication between the AP and the first STA based on the joint transmission information.

Abstract: A user equipment for operating in a wireless network, wherein the wireless network utilizes a first number of resources for serving communicating UEs, comprises a wireless interface for communicating in the wireless network; and a controller configured for selecting, for communicating in the wireless network, from a second number of predefined subsets of the first number of resources, at least one subset. The second number is larger than the first number and the second number of predefined subsets is based on a mapping of the first number of resources into the second number of subsets using an Euler-square mapping.

Abstract: A device and associated methods for entering a PIN via tapping are disclosed. The device can be configured to determine a number of taps provided by a PIN holder on a touch sensor in representation of a PIN digit and to store the number of taps as a digit in a sequence that represents the PIN. Indications for interaction with the device can be provided to PIN holders in the form of auditory cues. A visually impaired PIN holder may be able to complete a PIN entry process by following the indications for interaction, tapping on a touch sensor a number of times equal to the value of the digit of the PIN to be entered, and performing gestures mapped to commands for the device.

Abstract: Methods, systems, and devices for wireless communications are described. A base station may transmit, to each user equipment (UE) of a set of UEs, a different respective set of one or more training parameters for a digital pre-distortion procedure. Some or all of the UEs may determine one or more respective training values based on the one or more training parameters, where the training values from the UEs support the base station computing a set of non-linearity coefficients for the digital pre-distortion procedure. The base station thus may receive training parameters from some or all of the UEs and determine the set of non-linearity coefficients based thereon. The base station use the non-linearity coefficients to perform the digital pre-distortion procedure for one or more downlink transmissions, to one or more UEs of the group of UEs used for training, or to one or more other UEs.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive configuration information from a base station that indicates a set of resources for the UE to establish sidelink communications with another UE in a wireless network. The UE may transmit a first set of reference signals using a first set of beams to determine a set of neighboring candidate UEs for a sidelink connection. The UE may then transmit a second set of reference signals on a second set of beams to the neighboring candidate UEs, and may select a second UE located in the determined neighboring set using various beam scanning procedures. The UE may identify a transmit beam associated with the second UE, and may establish the sidelink connection using the identified transmit beam.

Abstract: Disclosed herein are system, apparatus, article of manufacture, method and/or computer program product embodiments, and/or combinations and sub-combinations thereof, for synchronizing playback of audiovisual content with a dumb speaker. In some embodiments, an electronic device transmits a spread spectrum signal to a dumb speaker over a data channel using a spread spectrum code. The electronic device then receives the spread spectrum signal played back auditorily by the dumb speaker. The electronic device despreads the spread spectrum signal based on the spreading code. The electronic device determines a time of receipt of the spread spectrum signal. The electronic device calculates an audiovisual output path delay for the dumb speaker based on the time of receipt and a time of transmission. The electronic device then synchronizes the playback of the audiovisual content at the dumb speaker and another electronic device based on the audiovisual output path delay.

Abstract: A communication device includes a signal determiner determining whether there is a reception signal, and a period estimator estimating an interruption period of interruption of a signal transmitted from a device as a source of the reception signal, using a determination result from the signal determiner.

Abstract: This disclosure relates to performing grouped MIMO communications in a cellular communication system. A cellular base station may select a precoding matrix for transmitting a downlink signal to a wireless device via a MIMO channel. The selected precoding matrix may have unequal weights for different MIMO subchannels. The downlink signal may be precoded using the selected precoding matrix. The precoded downlink signal may be transmitted to the wireless device via the MIMO channel. The wireless device may receive and decode the downlink signal.

Abstract: An arrangement is disclosed where in a multi-carrier communication system, the modulation scheme, coding attributes, training pilots, and signal power may be adjusted to adapt to channel conditions in order to maximize the overall system capacity and spectral efficiency without wasting radio resources or compromising error probability performance, etc.

Abstract: The present disclosure describes apparatuses and methods for dynamic interference cancellation in wireless receivers. In some aspects, a signal vector transmitted through a wireless environment is received via multiple antennas of a receiver, the signal vector affected by interfering signals in the wireless environment. The receiver determines an interference channel matrix for the signal vector based on the interference received with the signal vector and selects, from the interference channel matrix, columns of the interference channel matrix to form a noise-cancelling equalization matrix. The receiver then equalizes the signal vector with the noise-cancelling equalization matrix to remove a portion of interference from the signal vector to provide noise-cancelled equalized values of the signal vector for decoding. By so doing, the receiver may reduce effects of interference of the wireless environment (e.g.

Abstract: An access point (AP) in a wireless local area network (WLAN) uses a protocol to determine frequency/time resource allocations of resource units (RUs) in parallel with data transfer to and from WLAN stations (STAs). The AP generates a sounding table associating STAs with RUs for uplink (UL) and downlink (DL). The AP processes the sounding table to create a channel map table and then the AP allocates particular RUs to particular STAs. The STAs then receive and transmit data from and to the AP over the allocated RUs. This approach achieves good throughput while reducing the use of signaling and pilot overhead associated with channel sounding. To avoid interruption of ongoing transmissions, a newly arriving STA is grouped and sounded with other STAs. The protocol includes a joint sounding and data epoch followed by a determination of the channel map table.

Abstract: The present disclosure discloses an uplink detection method and device in a NOMA system. The method includes: performing pilot activation detection on each terminal in a first terminal set corresponding to a NOMA transmission unit block repeatedly until a detection end condition is met, wherein the first terminal set includes terminals that may transmit uplink data on the NOMA transmission unit block; performing channel estimation on each terminal in a second terminal set that determined through the pilot activation detection within each repetition period, wherein the second terminal set includes terminals that have actually transmitted uplink data on the NOMA transmission unit block; and detecting and decoding a data channel of each terminal in the second terminal set within each repetition period.

Abstract: A technique for controlling and using a reference signal for a radio link between a base station and a radio device is described. As to a method aspect of the technique, a control message indicative of a scrambling identifier selector for selecting a scrambling identifier associated with the radio link is transmitted to the radio device. The transmitted scrambling identifier selector depends on a time index and a link identifier associated with the radio link. Over the radio link, the reference signal is transmitted to or received from the radio device at a time according to the time index. The reference signal is based on a pseudo-random binary sequence, which is generated using a seed value depending on the time index, the scrambling identifier selector and the scrambling identifier selected according to the scrambling identifier selector.

Abstract: An improved technique for encoding and decoding of data for group common control channels is provided herein. Generally, the embodiments disclosed herein involve masking the information bits of the group common PDCCH (or group common control channel information) with the common RNTI, without using parity bits, which reduces the power requirements of the transmitter and receiver. In a first embodiment, the information block and the common RNTI can each be encoded using separate encoders, and then the encoded information block can be masked with the encoded common RNTI, and the resulting code symbol can be transmitted to the group of mobile devices. In a second embodiment, an information block can be appended with bits to match a size of the common RNTI, and then be masked by the common RNTI.

Abstract: A method for identifying a radio frequency transmitter is described, wherein a radio frequency signal is received via a radio frequency channel, the radio frequency signal including at least one radio frequency sequence. The sequence received is split into a plurality of chunks. The radio frequency channel is equalized by using a first subset of the plurality of chunks. The amplitude of each chunk of a second subset of the plurality of chunks is measured in the equalized radio frequency channel. The at least one amplitude is used for deciding whether the at least one sequence of the radio frequency signal corresponds to a sequence listed in a list. Further, a system for identifying a radio frequency transmitter is described.

Abstract: Aspects of the subject disclosure may include, for example, obtaining a schedule of spectral segments in a communication link of a communication system. Signal interference is identified in a portion of a number of spectral segments according to the schedule of spectral segments and at least one threshold for detecting interference. A determination is made that a number of signal interferers in the portion of the number of spectral segments exceeds a number of filters and, responsive to the number of signal interferers exceeding the number of filters, use of the number of filters is prioritized to filter signal interference in the portion of the number of spectral segments for suppressing at least a portion of the signal interference detected.

Abstract: Systems and methods provide for one or more server computers communicatively coupled to a network and configured to: generate a code construction for a file, including layers, each at a different code rate; calculate optimized code parameters, including storage efficiency, error-correction capability parameters, and constraints on error patterns; use the plurality of layers and optimized parameters to encode the file on a physical storage media; detect an error on the physical storage media; identify an error location within a first layer encoded at a first code rate; mark the error location as an erasure; and identify the erasure and a second error location for a second error location within a second layer, higher than the first layer, encoded at a second code rate.

Abstract: Embodiments of the present invention provide a data transmission method and apparatus. The method includes: determining a contention transmission unit CTU to be used by to-be-sent uplink data, where the CTU is a transmission resource including at least a time domain resource, a frequency domain resource, and a code domain resource; encoding the to-be-sent uplink data by using N different code element groups in the code domain resource corresponding to the determined CTU, to obtain N groups of encoded data, where N is a positive integer greater than or equal to 2; and sending the N groups of encoded data by using the time domain and frequency domain resources that are corresponding to the determined CTU. According to the embodiments of the present invention, data reception reliability at a receive end can be improved.

Abstract: According to an aspect of the present invention, a method for transmitting a Demodulation Reference Signal (DMRS) performed by a terminal in a wireless communication system that supports a Narrow Band (NB)-Internet of Things (IoT) includes generating a DMRS sequence by considering a single subcarrier transmission or a multiple subcarrier transmission; mapping the generated DMRS sequence to one or more symbols in time domain; and transmitting the DMRS to a base station through the mapped symbols, where each element of the generated DMRS sequence is sequentially mapped to each symbol of M symbols, when the DMRS is transmitted through the single subcarrier, and where the generated DMRS sequence is mapped to N symbols, when the DMRS is transmitted through the multiple subcarriers.

Abstract: A data transmission method and apparatus are provided. The method includes: modulating, based on a codebook, every N information bits of to-be-transmitted data into one M-dimensional modulation symbol, where the codebook is generated based on an M-dimensional modulation constellation, the M-dimensional modulation constellation includes M modulation constellations, a constellation point in an mth modulation constellation in the M modulation constellations is obtained by mapping N information bits based on an mth information bit subset, the mth information bit subset includes information bits on some locations in the N information bits, and a union set of M information bit subsets respectively corresponding to the M modulation constellations is the N information bits, where M and N are integers greater than or equal to 2, and m is 1, 2, . . . , or M; and sending the generated M-dimensional modulation symbol. The technical solutions can reduce complexity when a modulation signal is demodulated.

Abstract: A method of transmitting a signal by a base station in a beam forming-based communication system is provided. The method includes: transmitting the signal using a transmission beam having at least one of a beam width and a transmission period in reverse proportion to one of a distance between a position of a transmission target region of the transmission beam for transmitting the signal within a service coverage of the base station and the base station and a size or area of the transmission target region.

Abstract: Aspects of the present disclosure relate to methods and apparatus for allocating (or assigning) channels to different groups of wireless nodes in the case of co-channel coexistence between the different groups and interference to one or more other wireless nodes. One example method generally includes evaluating, for different assignments of channels to different groups of wireless devices that share bandwidth, an amount of transmission limitation imposed due to higher-tier protection, and assigning one or more of the channels to each of the groups, based on the evaluation.

Abstract: A method of forming a textured effect on a substrate, the method comprising steps of: (a) creating a data file of an image having a thickness to be formed as the textured effect on the substrate, the data file comprising print image(s) and a number of times specified for printing of the print image(s); (b) preparing the data file for surface deposition by a printer; (c) providing the substrate on the printer; (d) the printer printing the print image(s) in the data file on the substrate using a layer of clear ink; (e) the printer UV curing the layer of ink; (f) repeating steps (d) and (e) for every print image of the print image(s) for the number of times specified in the data file such that the image formed as the textured effect on the substrate comprises a plurality of layers of printed and UV cured clear ink.

Abstract: A radio receiver is disclosed, comprising: a receiving stage configured to receive a multi-layered signal comprising a plurality of layers; a division stage configured to divide the plurality of layers into a first subset and a second subset; a first whitening filter configured to filter the multi-layered signal based on a noise and interference covariance measure derived from the second subset to provide a first filtered multi-layered signal; and a first detection stage configured to detect at least one layer of the first subset based on the first filtered multi-layered signal.

Abstract: An on-board method for the end-to-end transparent transport of data packets is implemented by a telecommunications system comprising a first, sending station, a second, receiving station, a first, sending satellite, connected directly to the first station, and a second, receiving satellite, connected directly to the second station, the first satellite and second satellite being interconnected via a spaceborne network. The transport method comprises steps allowing an end-to-end transparent adaptive control loop for the adaptive control of the modulation and of the coding of the access links between the first station and the first satellite and between the second station and the second satellite to be implemented.

Abstract: Indication of an amount of processing performed in detection and removal of ingress noise may be provided. A frequency domain representation of a narrowband region of a digital input signal may be received. The received frequency domain representation of the narrowband region may be compared with a predetermined threshold. Results from the comparison of the received frequency domain representation of the narrowband region with the predetermined threshold may be aggregated. Based on the aggregated results, an indication of an amount of processing performed by an ingress exciser in removing the ingress noise may be provided.

Abstract: A method for adapting a beam shape of a beam in a wireless communication system having multiple nodes is disclosed. Each node is provided with an antenna system configured to provide radio coverage in a cell by a cell specific beam. The method comprises: calculating a transmit weight vector for each user to be served by a given cell based on information of spatial channel characteristics for the user to be served by the given cell and long term interference characteristics estimated based on aggregated information of spatial channel characteristics for users that the given cell should avoid interfering with and that are served by other cells; performing phase normalization of the calculated transmit weight vectors; and aggregating all transmit weight vectors to establish a common transmit weight vector used to form the beam shape for the cell specific beam.

Abstract: To enable low latency uplink to be used in a more preferable mode can be provided. A device includes: a communication unit configured to perform radio communication; and a control unit configured to perform control such that control information is transmitted from the communication unit to a terminal, the control information indicating that a communication scheme in which data non-orthogonally multiplexed for a plurality of layers is demodulated through cancellation of interference between the layers and in which the data is transmitted from the terminal to a base station through a predetermined uplink resource, is available.

Abstract: The present disclosure provides a method for interference cancellation which includes: calculating a mean value and a variance value of a received signal to obtain statistics information of the received signal; calculating an estimating log-likelihood ratio using the statistics information of the received signal; calculating a decoding log-likelihood ratios of the received signal using the estimating log-likelihood ratio of the received signal, and performing calculations to update the statistics information of the received signal; repeating the above steps for a pre-determined number of times, performing hard decisions on the decoding log-likelihood ratios of the received signal, and outputting data bits obtained from the hard decision. The present disclosure also provides an apparatus, an auxiliary method, a base station and a terminal device for interference cancellation.

Abstract: Disclosed are a method and a device for allocating wireless resources in bandwidths of different sizes in a wireless LAN. The method for allocating wireless resources in bandwidths of different sizes in a wireless LAN may comprise steps in which: an AP determines a first resource unit to be allocated to an STA in a first bandwidth; and the AP schedules the first resource unit for the STA, wherein the allocation starting position of the first resource unit allocated in the first bandwidth is configured the same as the allocation starting position of a second resource unit allocated in a second bandwidth, and the allocation starting position of a first guard tone adjacent to the first resource unit may be configured differently from the allocation starting position of a second guard tone adjacent to the second resource unit on the basis of tone shifting.

Abstract: Disclosed are methods and apparatus used in wireless communications. The methods and apparatus establish a codebook for use in sparse code multiple access (SCMA) encoded communications, in particular. The SCMA codebook is configured to set the codebook for at least one layer (i.e., a user) to include a constellation of points having a first grouping of constellation points located at first radial distance from an origin in a complex plane and a second grouping of constellation points located at a second radial distance from the origin. This codebook arrangement provides increased gains at receivers by optimizing the constellation shape to improve the distance between constellation points (i.e., SCMA codebook performance), and in particular more robust performance when encountering amplitude and phase misalignment in uplink (UL) multiple access.

Abstract: A modem apparatus is configured to provide wireless network access in accordance with an Orthogonal Frequency Division Multiplexing communications scheme. The apparatus comprises a hardware subsystem comprising baseband processing components (302) and Radio Frequency processing components (304). The baseband processing components (302) comprise a first converter component (314) arranged to convert between time and frequency domains in accordance with the Orthogonal Frequency Division Multiplexing communications scheme, and a second converter component (316) arranged to convert between parallel and serial data formats, the second converter (316) being operably coupled to the first converter (314). The Radio Frequency processing components (304) comprise a cyclic prefix processing component (318) responsive to control information.

Abstract: Embodiments of the present invention provide a decoding method and apparatus. The method includes: receiving K user signals by using N subcarriers, where one user signal is carried on at least two subcarriers of the N subcarriers, one subcarrier carries at least two user signals of the K user signals, and 2?N<K; determining, from the N subcarriers, at least two target subcarriers that carry a target user signal, and performing initialization calculation on the target subcarriers, to obtain initialization calculation results; and determining, in a logarithm domain, a probability of each codeword in a codebook of the target user signal according to the initialization calculation results, to decode the target user signal. According to this method, decoding can be performed in the logarithm domain with low complexity.

Abstract: A method for receiving a signal by integer forcing in a wireless communication system is provided. The method includes receiving one or more signals through a plurality of antennas, filtering the received one or more signals using a forcing matrix, generating codewords by remapping the filtered one or more signals, acquiring a summed codeword by performing a modulo operation on the codewords, decoding the summed codeword, and acquiring original codewords by performing an inversion operation on the decoded summed codeword.

Abstract: A communication system in which probabilistic signal shaping and FEC coding are jointly applied using a partial amplitude-shaping scheme, under which bit-words representing binary labels of the transmitted amplitudes may have (i) a fixed number of amplitude most-significant bits (MSBs) generated using a shaping code and (ii) a fixed number of amplitude least-significant bits (LSBs) generated using an FEC code, e.g., without the shaping code being applied thereto. In various embodiments, the transmitted constellation symbols can carry, as sign bits, some original information bits and/or the parity bits generated by FEC-encoding some combination of the MSBs, the LSBs, and said some original information bits. Some embodiments are compatible with convolutional FEC codes, such as the trellis-coded modulation. Some embodiments can be used in communication systems relying on discrete multi-tone modulation, such as the systems providing DSL access over subscriber lines.

Abstract: A control method for a communication network that has a transmitter with an array of transmit antennas and that has at least one receiver communicating with the transmitter. The receiver performs a channel measurement for a receive antenna of the receiver using a signal transmitted from the transmitter to the receiver. The receiver further determines channel coefficients for each of an array of transmit antennas at the transmitter from an output of the channel measurement, and then applies a linear, reversible and orthogonal transform to the channel coefficients, thus ascertaining channel component coefficients indicative of the individual weight of respective channel components in a transform domain. The receiver then selects one or more channel components in the transform domain and communicates to the transmitter a control signal indicative of one or more preferred channel components or a magnitude of one or more channel component coefficients, or both, in quantized form.

Abstract: A method includes receiving an n-level Pulse Amplitude Modulated (PAM-n) signal at a receiver from a transmitter via a channel. The method also includes determining one or more sampling times of the PAM-n signal. The method further includes determining one or more slicing levels of the PAM-n signal. The method also includes extracting and decomposing jitter in the PAM-n signal for each slicing level of the PAM-n signal to determine one or more jitter components. The method further includes extracting and decomposing noise in the PAM-n signal for each data level of the PAM-n signal to determine one or more noise components. The method also includes adjusting the receiver, the transmitter, the channel, or any combination thereof, based on the one or more jitter components, the one or more noise components, or both.

Abstract: Embodiments relate to a data transmission method. A relay node receives information that is about an SCMA codebook used by the relay node and that is sent by a destination node. The relay node receives two or more source signals sent by two or more source nodes. The relay node performs network coding on the received two or more source signals. The relay node performs SCMA codebook mapping on a signal obtained after the network coding, so as to obtain at least two modulation symbols. The relay node sends to the destination node, the at least two modulation symbols obtained after the SCMA mapping.

Abstract: The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting control information through a PUCCH in a wireless communication system and an apparatus for same comprising the steps of: obtaining a plurality of second modulation symbol streams corresponding to a plurality of SC-FDMA (Single Carrier Frequency Division Multiplexing) symbols by diffusing a plurality of first modulation symbol streams to form the first modulation symbol streams corresponding to the SC-FDMA symbols within a first slot; obtaining a plurality of complex symbol streams by performing a DFT (Discrete Fourier Transform) pre-coding process for the plurality of second modulation symbol streams; and transmitting the plurality of complex symbol streams through the PUCCH wherein the plurality of second modulation symbol streams are scrambled in a SC-FDMA symbol level.