60results about "Error correction/detection using single space coding" patented technology

A system includes a memory controller, multiple memories coupled to the memory controller, and multiple controlling components coupled to the memory controller. The memory controller calculates an error correction code (ECC) syndrome of a first type for a segment of data; stores the segment of data and the ECC syndrome of the first type in a first memory of the multiple memories; receives a request from a controlling component of the multiple controlling components directed to the segment of data, the controlling component implementing an ECC syndrome of a second type; transforms the ECC syndrome of the first type for the segment of data to the ECC syndrome of the second type; detects a number of errors, if any, present in the segment of data; and takes further action depending on how many errors are detected.

Disclosed in the present application are a sphere decoding detection method and apparatus, and an electronic device and a readable storage medium. The method comprises: performing orthogonal triangular QR decomposition on a channel response matrix, so as to obtain a Q matrix and an R matrix, wherein columns in the Q matrix are arranged according to the magnitude of channel energy; according to the Q matrix and the R matrix, determining a target equalization signal; executing an ML path search process according to the target equalization signal, so as to select N branches with the minimum metric as survivor paths; performing an ML complement path search on the survivor paths, so as to obtain ML complement paths; and using the survivor path with the minimum metric as an ML path, and obtaining likelihood ratio information of each bit of each symbol of each layer according to the ML path and the ML complement paths.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may generate an encoding matrix including a set of information columns including systematic bits, a first set of core parity columns including a first set of parity bits, and one or more sets of extension parity columns including a second set of parity bits. The UE may puncture one or more of the systematic bits with the first set of parity bits, the second set of parity bits, or a combination thereof, based on an offset value indicating an initial column of the encoding matrix. The UE may encode an initial message in accordance with the encoding matrix based on the offset indicating the initial column of the encoding matrix.

An encoding method includes: obtaining m lanes of first data streams through m input lanes, where m is a positive integer; processing the m lanes of first data streams to obtain z lanes of second data streams, where z is a positive integer; separately performing encoding processing on each of the z lanes of second data streams to obtain z lanes of third data streams; and performing multiplex processing on the z lanes of third data streams to obtain n lanes of fourth data streams, where n is a positive integer.

A data transmission method, an apparatus, and a system are provided. An optical device of a transmitter may select one inner-code processing mode from a plurality of inner-code processing modes based on a requirement, and indicate the inner-code processing mode to an optical module of a receiver. The selected inner-code processing mode may be indicated to the receiver by using a PAD sequence, without requiring an additional resource and without changing a baud rate of a data stream. The optical device of the receiver may also detect quality of a current link, to select an inner-code processing mode that matches the quality, and feed back the inner-code processing mode to the transmitter, so that the transmitter can switch the inner-code processing mode based on an indication.

Certain aspects of the present disclosure provide a method for wireless communications by a transmitter. The method generally includes obtaining a first block of information bits from a buffer, generating a first sequence of probabilistic amplitude shaped (PAS) symbols, from the first block of information bits, using a demapper function and an arithmetic decoder function, transmitting the first sequence of PAS symbols to a receiver, combining a first subset of the first block of information bits, identified by an arithmetic encoder function and a mapper function, with a second block of information bits from the buffer, generating a second sequence of PAS symbols, from the combined first subset of the first block of information bits and second block of information bits, using the demapper function and the arithmetic decoder function, and transmitting the second sequence of PAS symbols to the receiver.

A method performed by an electronic device is provided. The method includes receiving a first signal related to an initial transmission of a transport block, based on a failure to decode the first signal, storing first data related to the first signal in a soft buffer of the electronic device, receiving a second signal related to a retransmission of the transport block, storing second data related to the second signal in the soft buffer, identifying, among the soft buffer, a first area for the first data and a second area for the second data, distinguished from an area in which data is not stored, as a decoding area, and based on the decoding area, performing decoding of first combined data obtained based on combining the first data and the second data.

Techniques for an optical receiver are disclosed. The optical receiver may include an optical digital signal processing (ODSP) device. The ODSP device may include: a photodiode operable to convert an optical signal into an electrical signal; a digital signal processor operable to generate a digital signal based on the electrical signal; a quantization component operable to generate a quantized output signal based on the digital signal; and a processing device. The processing device is operable to: measure one or more signal statistics of the digital signal; and identifying one or more quantization thresholds, wherein the one or more quantization thresholds are calculated based on the one or more signal statistics.

A duty margin monitoring circuit (220), coupled to a functional circuit (210) which generates a first output signal in response to a target signal, includes a modulation circuit (260), a replica circuit (270) and an error detection circuit (280). The modulation circuit (260) is arranged to receive the target signal and modulate the target signal to generate a modulated target signal. The replica circuit (270) is arranged to receive the modulated target signal and generate a second output signal in response to the modulated target signal. The error detection circuit (280) is coupled to the functional circuit (210) and the replica circuit (270) to receive the first output signal and the second output signal and arranged to generate an error detection result according to the first output signal and the second output signal.

Example embodiments of the present disclosure relate to devices, methods, apparatuses, and computer-readable storage media for data encryption and decryption. In an example embodiment, a first cryptographic key and a second cryptographic key are obtained. The first cryptographic key includes a vector of cryptographic elements, and the second cryptographic key includes a set of indices corresponding to a subset matrix of a polar matrix. A cryptographic vector is generated by polar encoding a data vector based on the first cryptographic key and the second cryptographic key and the polar matrix. The data vector and the cryptographic vector are combined for encryption of the data vector.

A method for wireless communication at a first wireless device and related apparatus are provided. In the method, the first wireless device arranges a sequence of data bits into multiple groups of interleaved bits using one or more interleavers. Each interleaver of the one or more interleavers has positions arranged in a first direction and a second direction, with a fixed size in at least one of the first direction or the second direction, and each group of interleaved bits has a group size based on the fixed size. The first wireless device further transmits an interleaved signal including the multiple groups of interleaved bits to a second wireless device.

Embodiments of this application provide a modulation method and apparatus. The method includes: receiving a code word sequence, where each code word includes N bits, and the code word sequence includes at least a first code word; mapping the code word sequence into M sequences, where each sequence includes N / M bits from the first code word; mapping the M sequences into a symbol sequence, where each symbol is corresponding to M bits, the M bits are respectively from the M sequences, first bits corresponding to N / M first-type symbols are from the first code word, and second bits corresponding to N / M second-type symbols are from the first code word. As a result, a first bit corresponding to the second-type symbol is definitely from another code word different from the first code word. A bit in the second-type symbol and from the another code word may be demodulated by using information about the first code word, so that the bit in the second-type symbol and from the another code word can be demodulated more accurately, thereby lowering a signal-to-noise ratio requirement during higher order modulation.

A probabilistic shaping encoding circuit (1) includes: with x, m, and n[x] being natural numbers (m = 1, 2,..., n[x]), an m-th lookup table (11) of a layer x + 1 to convert an m-th transmission bit string of the layer x + 1 including an m-th transmission information bit string of the layer x + 1 which is a part of an information bit sequence of a communication target and an m-th transmission address bit string of the layer x + 1 into an m-th transmission shaping bit string of the layer x + 1; an m-th distribution circuit (12) of the layer x to convert the m-th transmission shaping bit string of the layer x + 1 into a (2m-1)-th transmission source address bit string of the layer x and a 2m-th transmission source address bit string of the layer x; a (2m-1)-th lookup table (14) of the layer x to generate a (2m-1)-th transmission shaping bit string of the layer x from the (2m-1)-th transmission source address bit string of the layer x and a (2m-1)-th transmission information bit string of the layer x which is a part of the information bit sequence of the communication target; and a 2m-th lookup table (15) of the layer x to generate a 2m-th transmission shaping bit string of the layer x from the 2m-th transmission source address bit string of the layer x and a 2m-th transmission information bit string of the layer x which is a part of the information bit sequence of the communication target. Each of the lookup tables is hierarchized in a tree shape, each of the transmission source address bit strings obtained by the m-th distribution circuit (12) of the layer x corresponds to designation information designating a combination of signal point groups in a signal space managed by each of a plurality of lookup tables of the layer x, each of the transmission shaping bit strings generated by the (2m-1)-th lookup table (14) of the layer x and the 2m-th lookup table (15) of the layer x corresponds to designation information designating a combination of signal point groups in a signal space managed by each of a plurality of lookup tables of a layer immediately below or signal point information indicating a signal point arrangement of the signal space.

Communication systems that utilize receivers for decoding short block length messages are disclosed. In many embodiments, the receiver includes an antenna for receiving encoded data, via RF signals, a demodulator for obtaining symbols from the RF signal, a demapper for generating symbol metrics, and a parallel list decoder. In several embodiments, the parallel list decoder processes multiple trellis stages simultaneously, enabling efficient decoding of the symbol metrics to obtain received, bits. In certain embodiments, the parallel list decoder divides the decoding trellis into segments, processes these segments independently, and combines them pairwise to form new segments. This parallel processing approach can allow for reduced decoding latency and improved efficiency in handling short block length messages. making it particularly suitable for applications requiring rapid data exchange and low-latency communication.

The present application provides a method for obtaining a check matrix, and a communication apparatus. In the method, a communication apparatus can obtain a check matrix on the basis of a first base matrix. Compared with a base graph, patch elements are added to the first base matrix, and the patch elements may correspond to cyclically shifted submatrices in a check matrix. Therefore, the number of non-zero elements in the check matrix can be increased, thereby reducing the presence of low column weights in the check matrix, improving the decoding performance of a floor region, and improving reliability. In addition, according to the present solution, the positions of the patch elements are further determined on the basis of a target bit rate, so that the addition of the patch elements can obtain a greater benefit.

An apparatus (20) includes a compressor (40), a memory (24), a decompressor (32) and a decoder (36). The compressor is configured to receive soft metrics of bits of a codeword of an Error Correction Code (ECC), and to convert a group of the soft metrics, which includes two or more soft metrics of bits associated with the same symbol, into a compressed representation (28). The memory is configured to store the compressed representation. The decompressor is configured to read the compressed representation from the memory and to decompress the compressed representation so as to produce decompressed soft metrics. The decoder is configured to decode the codeword using the decompressed soft metrics.

Embodiments of this application provide an encoding and decoding method of a concatenated code and a communication apparatus. The concatenated code uses a polar code as an outer code, and an N-ER-LDPC code provided in this application as an inner code. This application provides a base matrix of the E-NR-LDPC code and a lifting strategy of the base matrix. A parity-check matrix of the N-ER-LDPC code may be obtained by lifting the base matrix according to the lifting strategy. The parity-check matrix has an evident external feature, and can meet a rate compatibility requirement while improving decoding performance.

Example embodiments of the present disclosure are directed to an optimal error- privacy trade-off in information processing system. A method comprises obtaining transmission property information of a link between the first apparatus and a second apparatus based on a measurement metric on the link; and obtaining a result associated with a channel coding to a data set used for transmitting to the second apparatus on the link, based on the transmission property information.

Techniques pertaining to enabling and signaling 2×1944 low-density parity-check (LDPC) codes in next-generation Wi-Fi in wireless communications are described. A wireless communication apparatus (e.g., a station (STA)) selects a codeword length based at least in part on a number of available bits associated with a data portion in a physical-layer protocol data unit (PPDU). The apparatus generates the PPDU by performing LDPC coding with the selected codeword length. The apparatus then transmits the PPDU in a wireless communication.

Methods, systems, and devices for wireless communications are described. A first device may identify parameters for staircase encoding. The first device may perform a staircase encoding procedure on information bits in accordance with the parameters to generate encoded bits. At current step of the staircase encoding procedure, the first device may concatenate a first set of shaping bits with a first set of information bits to generate a second set of bits, perform a channel decoding procedure on the second set of bits to generate a second set of shaping bits for a subsequent step of the staircase encoding procedure, perform an encoding procedure on a third set of bits to generate a set of parity bits, and map the third set of bits and the set of parity bits to a set of symbols to generate a fourth set of bits for the subsequent step.

This application discloses an encoding method, a decoding method and an optical module, which are related to the field of data transmission technology. The method includes the steps of: an optical module acquiring an optical transmission mode used for signal transmission; an optical module receiving a signal on which outer-code encoding has been performed; an optical module determining an inner-code encoding scheme to be used by the optical module to perform inner-code encoding on the signal on which outer-code encoding has been performed based on the optical transmission mode; an optical module performing inner-code encoding on the signal on which outer-code encoding has been performed by using the inner-code encoding scheme; and an optical module outputting the signal on which inner-code encoding has been performed. According to this application, the error correction performance of Ethernet can be improved.

A system and method for detecting an angle of arrival (AoA) of incident waves are disclosed. An array of wave sensors each transduce incident waves into an electrical signal, which is then provided an additional phase shift that varies between sensors. Electrical signals from adjacent wave sensors, having different phase shifts, are coupled via a phase detector to classify the incident waves into “zero” and “one” AoA regions for that sensor pair. The outputs from many such phase detectors are combined to divide the space facing the array into many subregions, each subregion being associated with a unique codeword. Incident waves cause detection of codewords, that are decoded according to error detection and correction techniques, such as selecting, from a list, the codeword having a minimum Hamming distance to a received codeword. The decoder then outputs data indicating an AoA subregion associated with the decoded codeword.

User equipment (UE), next generation NodeB (gNB), or other network components can operate to configure unequal protection of data packets, including transport blocks (TBs), medium access control (MAC) packet data units, etc., into a single physical layer packaging for transmission. TBs can be unequally protected within the packaging on a single physical channel (e.g., a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), etc.) with four or fewer spatial layers (e.g., two spatial layers). Spatial, temporal, or frequency resources can be unequally utilized between different TBs or PDUs that can be transmitted at the physical layer, especially to prioritize or more tightly protect a particular TB over another within the packaging for a particular protocol or application.

The disclosed communication system includes a Dynamic Multiple Input / Multiple Output Transmission System (DMTS) module, and an adaptive forward error correction (FEC) module. The FEC module includes a transmission module for receiving first packets and commands from the DMTS module, generating a parity check for n number of the first packets, and retransmitting the first packets with the parity check to a channel manager in a transmission direction. The FEC module also includes a receive module for receiving second packets from the channel manager in a receive direction. The DMTS controls when a parity check is sent for a given flow. The parity check may be sent across multiple channels, and the FEC module can be enabled or disabled for each traffic flow.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter may generate multiple encoded bits using a polar encoder. The transmitter may separate the multiple encoded bits into N layers for a multiple-input-multiple-output (MIMO) transmission. The transmitter may select V layer pairs from the N layers, each layer pair of the V layer pairs including a respective first layer and a respective second layer from the N layers. The transmitter may group, for each layer pair of the V layer pairs, a first M symbol bits of the respective first layer and a second M symbol bits of the respective second layer to generate multiple bit pairs. Each bit pair includes a respective first bit of the first M symbol bits and a respective second bit of the second M symbol bits. Numerous other aspects are described.

The invention relates to a data interleaving method with n core processors, each associated with a local memory whose output portion is strictly smaller than the interleaving length L, comprising: implementing, N times, the interleaving algorithm of length L on said input sequence, the interleaved input sequence being the union of subsequences S_1, …, S_N; the ith implementation, i = 1 to N, of the interleaving being performed by one of the n cores, then storing only S_i in said local memory portion of said core; transferring S_i to a memory external to the processor core. Figure for the abstract: Fig. 2