63results about "Unequal/adaptive error protection" patented technology

Systems, methods, and instrumentalities are disclosed for priority-based channel coding for control information. A wireless transmit / receive unit (WTRU) may sort control information associated with a first control information type into a first control information group and the control information associated with a second control information type into a second control information group, for example, based on respective priorities associated with the first and second control information types. The WTRU may group one or more bits of the first control information group into a first bit level control information group and a second bit level control information group based on priority. The WTRU may selectively apply a cyclic redundancy check (CRC) to the first control information group, the second control information group, the first bit level control information group, and / or the second bit level control information group.

The invention discloses a layered LDPC (Low Density Parity Check Code) decoding method based on syndrome feedback self-adaption, and aims to solve the problem of poor decoding performance caused by fixed correction factors and poor adaptability to different check matrixes and channel conditions in the existing LDPC decoding algorithm. The method comprises the following steps of: firstly, dividing rows of a check matrix into a plurality of independent layers by adopting a hierarchical scheduling architecture so as to accelerate propagation and convergence of decoding information; secondly, in each iteration process of hierarchical decoding, a self-adaptive mechanism based on syndrome feedback is used, and a core offset factor beta in an offset minimum sum algorithm is adjusted in real time; the mechanism intelligently increases or decreases the offset factor by diagnosing the current decoding state (i.e., the number of unsatisfied check equations) to help the decoding process jump out of local optimum and stably converge. A simulation result shows that compared with a traditional offset minimum sum algorithm, the decoding performance is effectively improved and the bit error rate is reduced on the premise that the complexity is not obviously increased, and particularly, the performance gain is obvious in a medium-high signal-to-noise ratio region, and the robustness is higher.

Systems, methods, apparatuses, and computer program products for semantic communication involving joint source and channel coding (JSCC) over current communication networks. One method may include receiving, by a first network entity, from a second network entity, a multi-level bit error rate (BER) interface configuration comprising at least one BER based upon the request for a communication session; generating, by the first network entity, an application source encoder and decoder configured to encode and decode, respectively, a plurality of levels corresponding to the at least one BER; and training, by the first network entity, the application source encoder and decoder according to the BER.

Methods, systems, and devices for wireless communications are described. In some cases, a first wireless device may communicate, with a second wireless device, a control signal indicating a systematic polar code configuration, the systematic polar code configuration indicating for the first wireless device to perform systematic polar encoding on a first set of bits associated with a non-uniform bit distribution. As such, the first wireless device may apply a systematic polar code to the first set of bits to generate a systematic polar codeword based on the systematic polar code configuration. In such cases, the systematic polar codeword may include a set of parity bits and a set of systematic bits. Thus, the first wireless device may transmit at least the set of parity bits of the systematic polar code.

The present invention concerns a method for carrying out a semantic communication within a semantic communication system (10) defining a semantic communication channel, the semantic communication system (10) comprising a sender (12) and a receiver (14) connected through a wireless channel (16), the method comprising the following phases: - semantic communication setting comprising determining multiple semantic functions to be embedded into a waveform; - semantic adaption of the waveform to embed the multiple semantic functions; - semantic transmission of the adapted waveform in a form of an electromagnetic signal.

The present invention relates to a virtualized radio access point, vRAP, as well as to a method of operating the same. With regard to enabling high-performing DU virtualization in order to maximize performance in cloud-based virtualized RANs, the vRAP comprises an encoder / decoder configured to encode / decode transport blocks, TBs, by using iterative codes such as turbo codes or LDPC codes that exchange extrinsic information in each decoding iteration; and a digital signal processor, DSP, pipeline configured to infer information about the decodability of the data of the TBs by exploiting the exchanged extrinsic information.

Methods, devices, and systems for controlling a storage system, including: a storage device configured to store a plurality of code words; and at least one processor configured to: obtain information bits; encode the information bits using a first code to obtain a first plurality of code words; encode the first plurality of code words using a second code to generate a second plurality of code words; update the first plurality of code words based on the second plurality of code words to generate an adaptive generalized concatenated code (A-GCC) code word; and store the A-GCC code word in the storage device, wherein each code word of the first plurality of code words is encoded using a different error protection level.

According to one embodiment, a nonvolatile memory includes a plurality of memory areas and controller circuit including an error correction code encoder. The error correction code encoder encodes a first data to generate a first parity in a first operation and encodes a second data to generate a second parity in a second operation. The controller circuit writes the first data and the first parity into a first memory area among the plurality of memory areas and writes the second data and the second parity into a second memory area among the plurality of memory areas. The size of the second data is smaller than the size of the first data and the size of the second parity is equal to the size of the first parity.

A semiconductor memory device includes a plurality of detecting code generators configured to generate a plurality of detecting codes to detect errors in a plurality of data items, respectively, a plurality of first correcting code generators configured to generate a plurality of first correcting codes to correct errors in a plurality of first data blocks, respectively, each of the first data blocks containing one of the data items and a corresponding detecting code, a second correcting code generators configured to generate a second correcting code to correct errors in a second data block, the second data block containing the first data blocks, and a semiconductor memory configured to nonvolatilely store the second data block, the first correcting codes, and the second correcting code.

Disclosed in some examples are methods, systems, and machine-readable media for utilizing contextual information to create decoding feedback information to improve decoder accuracy and / or performance. In some examples, the context information is from a layer of the network stack above a layer in which the decoder is located. The context information may be or based on information about previously received and decoded data and / or information about the sender to provide decoding feedback information to the decoder that is both used to correct previous decoding errors, as well as to inform the decoder about which of the plurality of decoding selections is more likely to be correct. This may improve decoding performance by reducing errors, and in some examples, reduce the complexity of selection and thus improve decoder efficiency by excluding certain decoding possibilities.

Methods, systems, and devices for wireless communications are described. Cyclic redundancy check (CRC) bits may be appended to a set of information bits on a per-group basis prior to encoding using an error correcting code. The amount of CRC bits appended to each group of information bits may be based on the priority of the group of information bits. For example, the priority may be based on the type of information conveyed by the group of information bits. For example, for a video stream, information bits conveying low frequency information may have a higher priority than information bits conveying high frequency information, as the low frequency bits may be more important to user perception / experience of the video. The transmitting device and the receiving device may negotiate the CRC configuration (e.g., the CRC bits pergroupand the locations of the groups) so that the receiving device can verify the information bits.

This application provides a polar code encoding method and an apparatus, to reduce implementation complexity of encoding while ensuring encoding performance. The method includes: determining a threshold based on a length N of a first reliability sequence and a length M of an encoded bit sequence, where N is a positive integer power of 2, and M is a positive integer; determining a first sub-sequence and a second sub-sequence based on a rate matching method of the encoded bit sequence and the first reliability sequence; determining, based on the threshold, the first sub-sequence, the second sub-sequence, the rate matching method of the encoded bit sequence, and the first reliability sequence, K information bits corresponding to the encoded bit sequence, where K is a positive integer less than M; and performing polar encoding to obtain the encoded bit sequence.

A method for link transition in a USB device includes transmitting a plurality of first RS-FEC blocks by a first transmitter (S502), receiving an UNBOND set by a receiver (S504), waking up a second transmitter by a LASM when the receiver receives the UNBOND set (S506), transmitting a training sequence by the second transmitter (S508), transmitting a specific pattern sequence by the second transmitter after finishing transmitting the training sequence (S510), determining whether a current RS-FEC block to be transmitted by the first transmitter is a DESKEW block (S512), stopping transmitting the specific pattern sequence if the current RS-FEC block is determined to be the DESKEW block (S514), and transmitting a plurality of second RS-FEC blocks by the first transmitter and the second transmitter (S516).

One coding method of a plurality of coding methods including at least a first coding method and a second coding method is selected, an information sequence is encoded by using the selected coding method, and an encoded sequence obtained by performing predetermined processing on the information sequence is modulated and transmitted. The first coding method is a coding method having a first coding rate, for generating a first encoded sequence by performing puncturing processing on a generated first codeword by using a first parity check matrix. The second coding method is a coding method having a second coding rate, for generating a second encoded sequence by performing puncturing processing on a generated second codeword by using a second parity check matrix that is different from the first parity check matrix, the second coding rate after the puncturing process being different from the first coding rate.

This application provides a polar code encoding method and an apparatus. The method includes: determining a threshold based on a length N of a first reliability sequence and a length M of an encoded bit sequence, where N is a positive integer power of 2, and M is a positive integer; determining a first sub-sequence and a second sub-sequence based on a rate matching method of the encoded bit sequence and the first reliability sequence; determining, based on the threshold, the first sub-sequence, the second sub-sequence, the rate matching method of the encoded bit sequence, and the first reliability sequence, K information bits corresponding to the encoded bit sequence, where K is a positive integer less than M; and performing polar encoding to obtain the encoded bit sequence.

A queuing requester for access to a memory system is provided. Transaction requests are received from two or more requestors for access to the memory system. Each transaction request includes an associated priority value. A request queue of the received transaction requests is formed in the queuing requester. Each transaction request includes an associated priority value. A highest priority value of all pending transaction requests within the request queue is determined. An elevated priority value is selected when the highest priority value is higher than the priority value of an oldest transaction request in the request queue; otherwise the priority value of the oldest transaction request is selected. The oldest transaction request in the request queue with the selected priority value is then provided to the memory system. An arbitration contest with other requesters for access to the memory system is performed using the selected priority value.

Aspects of the disclosure provide for methods and systems for Sub-codebook based Trellis Coded Quantization for CSI Feedback. An aspect of the disclosure provides method executed by a receiver. The method includes receiving a signal from a transmitter, via a communication channel between the receiver and the transmitter. The method further includes estimating parameters associated with the channel based on the received signal. The method further includes obtaining phase information from the estimated parameters. The method further includes applying a trellis coded quantization (TCQ) scheme to the obtained phase information by mapping each sub-codebook index of a set of sub-codebook indices to output bits of each trellis branch making the distance between sub-codebooks maximally equal. The method further includes transmitting a channel state information (CSI) measurement feedback to the transmitter, the CSI measurement feedback based on the TCQ scheme and comprising one or more of: a beginning state, input bits to the TCQ scheme, and a sub-codebook index.

Technologies for optimizing post-FEC bit error rate performance of a Forward Error Correction (FEC) system are described. A controller is coupled to an FEC circuit and a receiver circuit. The controller receives FEC symbol error data from at least the receiver circuit or the FEC circuit and determines, using the FEC symbol error data, a post-FEC correlated performance metric indicative of an estimated post-FEC BER of the FEC circuit. The controller adjusts, based on the post-FEC correlated performance metric, at least one of a FEC parameter of the FEC circuit or a link parameter of the receiver circuit to decrease the estimated post-FEC BER. This improves the post-FEC BER performance of the FEC circuit.

A system and method for selecting a number of cyclic redundancy check bits in a communication system. In one embodiment, an apparatus operating in a communication system is configured to receive scheduling information from the communication system, and determine an information block length (K) and / or code rate (R) for a code block including a sequence of data bits from the scheduling information. The apparatus is further configured to determine a number of cyclic redundancy check (CRC) bits as a function of the information block length (K) and / or code rate (R) for the code block.

A transmission apparatus, in particular for use in a Low Throughput Network, comprises an FEC encoder configured to encode payload data into FEC code words each having a predetermined code word length, and a frame forming section configured to form a frame having a predetermined frame length. A frame comprises a first frame portion having a first predetermined length of an integer multiple of the predetermined code word length and a second frame portion having a second predetermined length shorter than the predetermined code word length. The frame forming section is configured to include an FEC code word and a predetermined number of repetitions of said FEC code word into the first frame portion of a frame and to include a selected number of bits of said FEC code word into the second frame portion of said frame.

The memory controller may receive memory data to be stored on the memory. The memory controller may receive metadata related to memory data. The metadata may be selected from a predetermined list of metadata. The memory controller may identify a coding polynomial of a plurality of polynomials associated with the metadata, each polynomial of the plurality of polynomials associated with a different metadata from a predetermined list of metadata. The memory controller may generate a codeword using a coding polynomial of the plurality of polynomials and the memory data.

A method for wireless communication at a first device and related apparatus are provided. In the method, the first device encodes an input signal into an encoded signal using a shift-invariant low-density parity-check (LDPC) convolutional coding. The shift-invariant LDPC convolutional coding is associated with an LDPC shift-invariant graph including a first plurality of streams of check nodes and a second plurality of streams of variable nodes. The LDPC base graph corresponding to a check node in the first plurality of streams of check nodes or a variable node in the second plurality of streams of variable nodes is independent of the position index of the check node or the variable node. The first device further transmits the encoded signal to a second device. The encoded signal includes coded bits corresponding to the second plurality of streams of variable nodes.

An operating method of a storage device, the storage device including a page type table, a parity table, and a non-volatile memory device, and the method including receiving a write request of first data from a host device, generating a first inside parity and a first outside parity, based on the first data, storing the first outside parity in the parity table, obtaining first reliability type information of a first page for storing the first data, by referring to the page type table, generating a first flexible parity, based on the first inside parity and the first reliability type information, generating first encoding data, based on the first data and the first flexible parity, and storing the first encoding data in the non-volatile memory device.

A method for data transmission includes receiving a first data stream and a second data stream for simultaneous transmission to a mobile device. The method continues by dividing a portion of the first data stream into a first plurality of data blocks and dividing a portion of the second data stream into a second plurality of data blocks, where the portion of the first data stream is time aligned with the portion of the second data stream. The method continues by creating a data matrix from the first and second plurality of data blocks and based on the data matrix, transmitting a first data block from each of the first and second plurality of data blocks to a first relay unit. Finally, based on the data matrix a second data block from each of the first and second plurality of data blocks is transmitted to a second relay unit.

The present application relates to communication methods and communication apparatuses. An example method includes obtaining a codeword comprising shaped amplitude bits, information bits, and parity bits; interleaving at least a portion of the codeword to generate groups of bits corresponding to complex-valued symbols, wherein each of the groups comprises Qm bits corresponding to one of the complex-valued symbols, and wherein Qm is a modulation order of the complex-valued symbols; and transmitting a signal comprising the groups of bits.