Mediatek Corporation

Skyworks Solutions, Inc.

Mediatek Singapore Pte. Ltd.

Cyntrust Communications, Inc.

Chiaming Lo

Ganning Yang

Yi Weng

Wei-De Wu

Lawrence Chen Lee

Timothy Perrin Fisher-Jeffes

Robert Joseph McCarty, Jr

Yi-Chang Liu

Terence Yim

Wei-Yu Lai

Linfang Wang

Various solutions for improving LDPC with respect to an apparatus in mobile communications are described. The apparatus may determine a first base matrix corresponding to a parity-check matrix of LDPC. The apparatus may determine a plurality of second base matrices based on the first base matrix by shifting a plurality of elements of the first base matrix along at least one of column-direction and row-direction, wherein a value of each element is one. The apparatus may determine the parity-check matrix according to the first base matrix and the second base matrices.

Method and apparatus for LDPC code construction in communications

A turbo decoder includes a plurality of decoder cores arranged for parallel decoding of a plurality of code segments of a code block in an iteration. Each of the decoder cores is arranged to decode a corresponding code segment according to a sliding window having a window size smaller than a length of the corresponding code segment in most cases, and sequentially generate a plurality of decoded soft outputs each derived from decoding an encoded soft input selected from the corresponding code segment by the sliding window.

Adaptive multi-core, multi-direction turbo decoder and related decoding method thereof

A decoding apparatus has an on-chip buffer, an external buffer interface, and a turbo decoder. The on-chip buffer is arranged for buffering each code block to be decoded. The external buffer interface is arranged for accessing an off-chip buffer. The turbo decoder is arranged for decoding a specific code block read from the on-chip buffer. The specific code block is not transmitted from the on-chip buffer to the off-chip buffer via the external buffer interface unless decoding fail of the specific code block is identified.

Decoding apparatus with adaptive control over external buffer interface and turbo decoder and related decoding method thereof

A decoding apparatus includes a memory device and a decoding circuit. The memory device is arranged for storing a data block with inter-row interleaving in a plurality of data rows of the data block and without intra-row interleaving in each of the data rows. The decoding circuit is coupled to the memory device. The decoding circuit is arranged for accessing the memory device to perform a first decoding operation with inter-row de-interleaving memory access, and accessing the memory device to perform a second decoding operation with intra-row de-interleaving memory access.

Decoding apparatus with de-interleaving efforts distributed to different decoding phases and related decoding method thereof

A method includes, during a first iteration of a first decoder for decoding convolutionally encoded data elements, determining a first value of a first path metric. The method also includes, during a second iteration of the first decoder, determining a second value of the first path metric by using the first value of the first path metric as an initial value of the first path metric.

Initializing decoding metrics

A system and method is provided for improved and efficient decoding of a received data sequence. The invention can perform the decoding using a LogMap function for a set of N inputs, where N is greater than 2.

System and method for decoding a received data sequence

A system and method is provided for improved and efficient forward and backward recursive computations that may be used, for example, with turbo code decoding applications. The invention performs the forward computations using a full length of a sequence to be decoded and performs the reverse computations using a sliding window over the sequence.

System and method for forward and backward recursive computation

A multiple stage matched filter for a wireless receiver comprises a receiver configured to develop a received signal, the received signal comprising a bit stream of signal samples, and a multiple stage matched filter configured to parallel process the received signal such that multiple codes are analyzed simultaneously to determine a frequency offset and code location.

Multiple simultaneous frequency and code acquisition for a code division multiple access (CDMA) communication system

A system and method for information content-independent synchronization with a received signal. A variable of the signal (e.g., average energy or magnitude) which is related to the energy distribution, is measured over a period of time. The signal's information bearing point is found at the point within the information period of the signal with the highest averaged energy. The point may be found, for example, by detecting the sample point with highest average energy, or by correlating multiple sample points to a stored template. Interpolation may be performed to locate an information bearing point that is between sample points. Because the relative energy content of the signal is effectively independent of the specific information content, synchronization with the information bearing point is accomplished without requiring the insertion of any special information content or fixed content patterns into the signal.

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Tustin, CA, United States of America

Chiaming Lo