Huawei Technologies Co., Limited

Hauwei Technologies Co., Ltd.

Yanxing Zeng

Jianqiang Shen

Vladimir Iosifovich Ivanov

Guangjian Wang

Gongyi Wang

Jinyi Zhang

Lev Borisovich Rapoport

Kunpeng Liu

Chao Zhang

Ying Jin

Yue Liu

Raymond W K Leung

Xi Yan

Liang Chen

Ruliang Dong

Weiguang Liang

Yufeng Mao

Wen Lv

Kebo Fu

Jinhong Yuan

Jun Ning

Marc Fossorier

Vasily Anatolevich Khlebnikov

Raymond WK Leung

An erasure code (EC)-based data processing method implemented by a storage controller includes obtaining K data chunks, dividing each of the K data chunks into two data slices, encoding the 2*K data slices based on a parity matrix including 2*M rows and 2*(K+M) columns of elements, to obtain 2*M parity slices, and separately storing the K data chunks and the M parity chunks in different storage devices.

Erasure code-based data processing method and apparatus

A flash memory error correction method and apparatus is provided. The method includes determining a first data bit in a flash memory page, where the first data bit corresponds to different data respectively in the data obtained by reading the flash memory page using the (n+1)read voltage threshold and the data obtained by reading the flash memory page using the mread voltage threshold; and then reducing a confidence level of the first data bit in the data obtained by reading the flash memory page using the (n+1)read voltage threshold; and performing, according to an adjusted confidence level of the first data bit, error correction decoding on the data obtained by reading the flash memory page using the (n+1)read voltage threshold. Present disclosure effectively improves a success rate of error correction decoding, thereby significantly improving performance of an SSD storage system.

Flash memory error correction method and apparatus

Embodiments of the present application provide a decoding method and a decoding device. The decoding device receives a second code word, which is transmitted from an encoding device based on a first code word. The first code word is generated by the encoding device based on a first encoded data sequence. After determining that a second encoded data sequence based on the second code word is not a correct replica of the first encoded data sequence, the decoding device performs a series of code element update processes to determining the correct replica of the first encoded data sequence.

Decoding device, decoding method, and signal transmission system

A data processing method based on a quasi-cyclic LDPC includes: when a size of service data is less than a magnitude of information bit of the quasi-cyclic LDPC, calculating a difference value between the magnitude of the information bit of the quasi-cyclic LDPC and the size of the service data, and filling the service data with the same amount of known data as the difference value (S); coding the filled service data to obtain redundancy check data corresponding to the service data (S); and sending the service data and the redundancy check data to a corresponding physical location in the storage unit (S). It ensures that when a code length of the quasi-cyclic LDPC is constant, the code length ideally adapts to internal space of the storage unit, and the quasi-cyclic LDPC has a relatively high error correction capability, thereby improving reliability and service life of the storage unit.

Data processing method and system based on quasi-cyclic LDPC

Embodiments of the present disclosure provide a decoding method of a polar code, including: acquiring a receiving sequence and a check matrix, wherein the receiving sequence is output on a channel after an input mapping sequence is encoded; carrying out Trellis path search according to the receiving sequence and the check matrix, and calculating Trellis path likelihood information corresponding to the input mapping sequence; calculating a decision value corresponding to the input mapping sequence according to the Trellis path likelihood information; and de-mapping the calculated decision value corresponding to the input mapping sequence according to a preset mapping relation to obtain a decoding sequence. The input mapping sequence belongs to a finite field GF(q), when decoding the polar code, the Trellis path search is carried out, and the decision value is calculated and de-mapped to simultaneously reduce a maximum list value and greatly reduce an average list value.

Decoding method and apparatus of polar code

This application discloses a storage controller. When running, the storage controller encodes, according to a check matrix, K to-be-coded data chunks obtained from a client, to generate two check chunks. In this way, if any chunk is damaged subsequently, the damaged chunk may be recovered by using the check matrix and an undamaged chunk.

Storage controller, data processing chip, and data processing method

A method () for cross-polarization interference power suppression in dual-polarization radio communication systems includes: filtering () a vertical polarization component (x(n)) and a horizontal polarization component (x(n)) of a received dual-polarization channel signal by a 2&#xd7;2 channel weights matrix (); and determining () the 2&#xd7;2 channel weights matrix () based on a minimum variance distortionless response criterion.

Method and device for cross-polarization interference suppression

The patent application relates to a method for recovering a sparse communication signal from a receive signal, the receive signal being a channel output version of the sparse communication signal, the channel comprising channel coefficients being arranged to form a channel matrix, the method comprising determining a support set indicating a set of first indices of non-zero communication signal coefficients from the channel matrix and the receive signal, determining an estimate of the sparse communication signal upon the basis of the support set, the channel matrix and the receive signal, determining second indices of communication signal coefficients which are not indicated by the support set, and determining the sparse communication signal upon the basis of the support set, the estimate of the sparse communication signal, the second indices and the channel matrix.

Method for recovering a sparse communication signal from a receive signal

A wireless receiver being capable of determining its velocity with respect to a number of wireless transmitters is provided. The wireless receiver includes a communication interface for receiving a number of carrier signals originating from the number of wireless transmitters, and a processor being configured to determine a number of carrier phases of the carrier signals at two different time instants, to determine a number of carrier phase differences from the determined number of carrier phases for each carrier signal between the two different time instants, to determine a location matrix indicating a geometric relationship between a location of the wireless receiver and a number of locations of the number of transmitters, and to determine the velocity of the wireless receiver upon the basis of the number of carrier phase differences and the location matrix.

Wireless receiver being capable of determining its velocity

A high order modulation method, a demapping method, and a corresponding device are provided. With the high order modulation method, important bits is distinguished, and the important bits are divided into important bits for distinguishing large regions and important bits for distinguishing small regions according to the difficulty of judgment areas. Therefore, the judgment accuracy rate of a demodulator is further improved.

High order modulation method, demapping method, and corresponding device

A method for encoding or decoding an LDPC code with variable code lengths is provided in an embodiment of the present invention. The method includes: obtaining a base exponential matrix of an LDPC code and grouping code lengths during construction of the base exponential matrix; correcting the base exponential matrix according to a grouping correction factor to obtain an exponential matrix of the group corresponding to the grouping correction factor; extending the exponential matrix by using an extension factor of a code length in the group to obtain an LDPC matrix corresponding to the code length; and implementing encoding or decoding by using the LDPC matrix.

Method for encoding or decoding LDPC code with variable length, device, encoder, and decoder

The embodiments of the present invention disclose an apparatus for transmitting multi-ary error-correcting codes, an apparatus for receiving multi-ary error-correcting codes, a data transmission system, and relevant methods to simplify operations. The apparatus for transmitting multi-ary error-correcting codes includes: a multi-ary channel encoder, adapted to perform multi-ary coding for source data frames of a user to obtain encoded sequences; a symbol mapper, adapted to perform symbol mapping for the encoded sequences to obtain symbol sequences; and a spreading and interleaving unit, adapted to spread and interleave the symbol sequences. Moreover, a corresponding apparatus for receiving multi-ary error-correcting codes, a data transmission system, and relevant methods are provided.

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Hangzhou, China

Yanxing Zeng