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yuan xing Lee
Zongwang Li, Shaohua Yang, Yang Han, Hao Zhong, Yuan Xing Lee, Weijun Tan: Turbo-equalization methods for iterative decoders. LSI Corporation, Mendelsohn Drucker & Associates P C, Craig M Brown, Steve Mendelsohn, October 16, 2012: US08291299 (23 worldwide citation)

Certain embodiments of the present invention are improved turbo-equalization methods for decoding encoded codewords. In one embodiment, in global decoding iteration i, the magnitude values of all decoder-input LLR values (Lch) are adjusted based on the number b of unsatisfied check nodes in the deco ...


2
yuan xing Lee
Ivana Djurdjevic, Bruce Alexander Wilson, Mario Blaum, Richard Leo Galbraith, Ksenija Lakovic, Yuan Xing Lee, Zongwang Li, Travis Roger Oenning: Techniques for generating bit reliability information in a post-processor using an error correction constraint. Hitachi Global Storage Technologies Netherlands, Steven J Cahill, October 11, 2011: US08037394 (23 worldwide citation)

Techniques are provided that generate bit reliabilities for a detected sequence. A detector generates the detected sequence. According to one embodiment, a post-processor finds a first set of combinations of one or more error events in the detected sequence satisfying a complete set or a subset of e ...


3
yuan xing Lee
George Mathew, Yang Han, Shaohua Yang, Zongwang Li, Yuan Xing Lee: Frequency-based approach for detection and classification of hard-disc defect regions. LSI Corporation, Mendelsohn Drucker & Associates P C, Steve Mendelsohn, October 4, 2011: US08031420 (10 worldwide citation)

In a hard-disc drive read channel, frequency-based measures are generated at two different data frequencies (e.g., 2T and DC) by applying a transform, such as a discrete Fourier transform (DFT), to signal values, such as ADC or equalizer output values, corresponding to, e.g., a 2T data pattern store ...


4
yuan xing Lee
Ivana Djurdjevic, Richard Leo Galbraith, Bruce Alexander Wilson, Yuan Xing Lee, Travis Roger Oenning, Mario Blaum, Ksenija Lakovic, Zongwang Li: Techniques for generating bit reliability information in the post processor. Hitachi Global Storage Technologies Netherlands, Steven J Cahill, October 11, 2011: US08037393 (4 worldwide citation)

A detector generates a detected sequence, and a post processor generates probability values that indicate the likelihood of a plurality of error events in the detected sequence. The post processor partitions the values into first and second subsets. The post processor selects a first most likely val ...


5
yuan xing Lee
Zongwang Li, Yuan Xing Lee, Richard Leo Galbraith, Ivana Djurdjevic, Travis Roger Oenning: Techniques for correcting errors using iterative decoding. HGST Netherlands, Steven J Cahill, December 25, 2012: US08341506 (3 worldwide citation)

Techniques are provided for iteratively decoding data recorded on a data storage device. An iterative decoder decodes the data using multiple decoding iterations to correct errors. In multiple iterations of the iterative decoder, a post processing block generates soft information, and a decoder appl ...


6
yuan xing Lee
Shaohua Yang, George Mathew, Yang Han, Zongwang Li, Yuan Xing Lee: Amplitude-based approach for detection and classification of hard-disc defect regions. LSI Corporation, Mendelsohn Drucker & Associates P C, Steve Mendelsohn, October 25, 2011: US08045283 (3 worldwide citation)

In a hard-disc drive, a defect region on the hard disc is classified as corresponding to either thermal asperity (TA) or media defect (MD) by generating two statistical measures. A first measure (e.g., α1) is based on (i) the magnitudes of one or both of signal values (e.g., equalizer input or outpu ...


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yuan xing Lee
Hao Zhong, Weijun Tan, Yang Han, Zongwang Li, Shaohua Yang, Yuan Xing Lee: Systems and methods for utilizing circulant parity in a data processing system. LSI Corporation, Hamilton DeSanctis & Cha, June 4, 2013: US08458553 (1 worldwide citation)

Various embodiments of the present invention provide systems and methods for data processing. For example, a method for data processing is disclosed that includes receiving a codeword that has at least a first circulant with a plurality of data bits and a first circulant parity bit, a second circula ...


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yuan xing Lee
Zongwang Li, Hao Zhong, Yang Han, Kiran Gunnam, Shaohua Yang, Yuan Xing Lee: Systems and Methods for Quasi-Cyclic LDPC Code Production and Decoding. LSI Corporation, Hamilton DeSanctis & Cha, February 3, 2011: US20110029835-A1

Various embodiments of the present invention provide systems and methods for generating a parity check matrix used in data processing. As an example, a method for generating a parity check matrix including selecting a non-affiliated variable node; identifying a check node of the lowest degree; conne ...



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