Error-floor mitigation of LDPC codes using targeted bit adjustments
K Gunnam - US Patent 8,448,039, 2013 - Google Patents
Embodiments of the present invention are methods for break ing one or more trapping sets
in a near codeword of a failed graph-based decoder, eg, an LDPC decoder. The methods …
in a near codeword of a failed graph-based decoder, eg, an LDPC decoder. The methods …
Breaking trapping sets using targeted bit adjustment
K Gunnam - US Patent 8,458,555, 2013 - Google Patents
See application file for complete search history. In one embodiment, an LDPC
decoderperforms a targeted bit adjustment method to recover a valid codeword after the …
decoderperforms a targeted bit adjustment method to recover a valid codeword after the …
Distributed storage and computing of interim data
(57) ABSTRACT A method begins by a set of distributed storage and task (DST) execution
units receiving a set of partial tasks and data, where a partial task of the set of partial tasks …
units receiving a set of partial tasks and data, where a partial task of the set of partial tasks …
Multi-mode layered decoding
K Gunnam - US Patent 8,499,226, 2013 - Google Patents
In one embodiment, a turbo equalizer is selectively operable in either first or second modes.
In the first mode, layered (low-density parity-check (LDPC)) decoding is performed on soft …
In the first mode, layered (low-density parity-check (LDPC)) decoding is performed on soft …
Error-correction decoder employing extrinsic message averaging
K Gunnam, S Yang, C Xu - US Patent 8,464,142, 2013 - Google Patents
3.755, 779 A 8, 1973 Price COrrect codeword, then (i) the controller selects the averaging
4,295.218 A 10, 1981 Tanner mode,(ii) the extrinsic LLR value generator is configured to …
4,295.218 A 10, 1981 Tanner mode,(ii) the extrinsic LLR value generator is configured to …
Adjusting soft-output values in turbo equalization schemes to break trapping sets
K Gunnam, S Yang, C Xu - US Patent 8,700,976, 2014 - Google Patents
6,307.901 B1 10/2001 Yu et al. 2008/0276.156 A1 11/2008 Gunnam et al. 6,550,023 B1
4/2003 Brauch et al. 2008/0301517 A1 12/2008 Zhong 6,678,843 B2 1/2004 Giulietti et al …
4/2003 Brauch et al. 2008/0301517 A1 12/2008 Zhong 6,678,843 B2 1/2004 Giulietti et al …
Error-floor mitigation of codes using write verification
7,895,500 B2 2/2011 Sun et al. JP 2007306495 A 11/2007 7,904,793 B2 3/2011 Mokhlesi et
al. W0 WO03092170 A1 11/2003 7,941,737 B2 5/2011 Gopalakrishnan et al. W0 …
al. W0 WO03092170 A1 11/2003 7,941,737 B2 5/2011 Gopalakrishnan et al. W0 …
Turbo interleaver for high data rates
Y Wei, J Sun, DP Malladi - US Patent 8,583,983, 2013 - Google Patents
Techniques for supporting high decoding throughput are described. A transmitter may
encode a code block of data bits With a Turbo encoder. A receiver may perform decoding for …
encode a code block of data bits With a Turbo encoder. A receiver may perform decoding for …
On-line discovery and filtering of trapping sets
K Gunnam - US Patent 8,504,900, 2013 - Google Patents
A communication system (eg, a hard drive) having a random-access memory (RAM) for
storing trapping-set (TS) information that the communication system generates on-line …
storing trapping-set (TS) information that the communication system generates on-line …
Adjusting input samples in turbo equalization schemes to break trapping sets
K Gunnam, S Yang, C Xu - US Patent 8,683,299, 2014 - Google Patents
US PATENT DOCUMENTS nodes. Adjustment of the equalized samples may be per formed
using any combination of Scaling, offsetting, and saturation. Channel detection is then …
using any combination of Scaling, offsetting, and saturation. Channel detection is then …