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Bahjat M Zafer

from San Jose, CA
Age ~57
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Also known as:
Bahjat Mohammed Zafer, Bahiat M Zader, J D
Related to:
Kais Zafer, 27Zafer Kais
Connected to:
Kaneez F Zafer, 63Uzma Zafer, 44Michael P Zaferakis, 54Betty A Zaff, 86Christine R Zaffarano, 65Christopher Zaffarano, 38Omar F Zaffar, 28Sajjad Zaffar, 36Joseph W Zaffater, 84Felicia M Zaffin, 68

Bahjat Zafer Phones & Addresses

  • San Jose, CA
  • 10410 Oakville Ave, Cupertino, CA 95014 (408) 739-3986 (408) 873-9232
  • 1252 Klee Ct, Sunnyvale, CA 94087 (408) 739-3986
  • 1620 Queen Charlotte Dr, Sunnyvale, CA 94087 (408) 739-3986
  • Las Cruces, NM
  • Santa Clara, CA
  • 1252 Klee Ct, Sunnyvale, CA 94087 (408) 561-4357

Work

Position: Precision Production Occupations

Skills

Algorithms • C • Signal Processing • Matlab

Emails

b***[email protected]

Industries

Wireless

Resumes

Resumes

Bahjat Zafer Photo 1

Bahjat Zafer

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Location:
Cupertino, California
Industry:
Wireless
Skills:
Algorithms
C
Signal Processing
Matlab

Publications

Us Patents

High Rate Runlength Limited Codes For 10-Bit Ecc Symbols

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US Patent:
6417788, Jul 9, 2002
Filed:
Mar 9, 2001
Appl. No.:
09/803401
Inventors:
Peter McEwen - Santa Clara CA
Kelly K Fitzpatrick - Sudbury MA
Bahjat M. Zafer - Sunnyvale CA
Assignee:
Maxtor Corporation - Longmont CO
International Classification:
H03M 700
US Classification:
341 59, 341 94, 360 40, 714701
Abstract:
A methodology for designing an implementing high rate RLL codes is optimized for application to 10-bit ECC symbols, and provides rate 20/21, rate 50/51, rate 90/91 and other modulation code rates for use in magnetic recording channels. A relatively small subcode encodingâone easy to implementâis applied to a portion of the input stream, and the resulting base codeword is partitioned into nibbles that, in turn, are interleaved among the unencoded ECC symbols. Code constraints on the subcode word nibbles depend upon the values of adjacent unencoded symbols. The resulting codes provide excellent density and error propagation performance.

Media Noise Optimized Detector For Magnetic Recording

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US Patent:
7173783, Feb 6, 2007
Filed:
Sep 20, 2002
Appl. No.:
10/247929
Inventors:
John McEwen, legal representative - Porter TX, US
Bahjat Zafer - Sunnyvale CA, US
Pauline Bolte - San Jose CA, US
Ara Patapoutian - Westborough MA, US
Kelly Fitzpatrick - Sudbury MA, US
Steve Stupp - Los Altos CA, US
Assignee:
Maxtor Corporation - Longmont CO
International Classification:
G11B 5/09
G11B 27/36
H03D 1/00
H04L 27/06
H03M 13/03
US Classification:
360 46, 369 5922, 375341, 714796
Abstract:
A media noise optimized (MNO) detector for a read channel compensates for pattern dependent media noise, and compensates for nonlinearities from many sources such as residual MR nonlinearity, residual nonlinear transition shift, partial erasure, write-induced nonlinearity, and steady-state mis-equalization. The MNO detector is implemented by adjusting a conventional Viterbi detector branch metric so that the channel output value (ideal value) can be a nonlinear function of the state/branch bits, and the branch metric scaling factor is a function of the state/branch. For a given state/branch, the ideal value is the mean of analog-to-digital converter samples for the pattern corresponding to the state/branch, and the branch metric scaling factor is proportional to the noise variance for the pattern corresponding to that state/branch.

Trellis-Based Detection Process And System

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US Patent:
7430704, Sep 30, 2008
Filed:
Dec 20, 2004
Appl. No.:
11/025769
Inventors:
Angelo Dati - Viareggio, IT
Pierandrea Savo - Pavia, IT
Ezio Iacazio - Vercelli, IT
Kelly Fitzpatrick - Sudbury MA, US
Bahjat Zafer - Sunnyvale CA, US
Assignee:
STMicroelectronics S.r.l.
Maxtor Corporation - Longmont CO
International Classification:
H03M 13/03
US Classification:
714794
Abstract:
A method for detecting signals affected by intersymbol interference provides for a path memory in the form of a trellis admitting survivor paths comprising a first and a second stage. The first stage includes a shift register exchange with a given number of states and a given length λ. The first stage outputs a first state S on the survivor path for the best state A, and a second state S on the survivor path for another state B. The second stage is configured as a two-state shift register exchange having a respective memory length Λ, including respective first and second registers. In the respective first and second registers the survivor paths are stored leading to a respective first σand second σstate, whereby the respective first register contains the backend of the best survivor path, while the respective second register contains the backend of an alternative survivor path.

Flexible Partial Response Targets For Data Detectors

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US Patent:
7440208, Oct 21, 2008
Filed:
Sep 20, 2002
Appl. No.:
10/251362
Inventors:
John McEwen, legal representative - Porter TX, US
Bahjat Zafer - Sunnyvale CA, US
Pauline Bolte - San Jose CA, US
Assignee:
Maxtor Corporation - Longmont CO
International Classification:
G11B 5/09
G11B 20/10
G11B 27/36
G11B 5/035
US Classification:
360 39, 360 31, 360 65
Abstract:
Automatically optimizing and programming features of a disk drive read channel for a selected partial response (PR) target. This enables flexible PR targets to be used in the read channel. The flexible PR targets can have arbitrary coefficients, and the channel features (parameters, functions and algorithms) that are dependent on the flexible PR targets are automatically adapted and programmed in hardware or firmware. With flexible PR targets, the read channel can support longitudinal and perpendicular recording without compromising performance.

Modified Defect Scan Over Sync Mark/Preamble Field

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US Patent:
7702973, Apr 20, 2010
Filed:
Apr 13, 2007
Appl. No.:
11/786981
Inventors:
John P. Mead - Longmont CO, US
Bahjat Zafer - Cupertino CA, US
Assignee:
Broadcom Corporation - Irvine CA
International Classification:
G11C 29/00
G06F 11/00
G11B 27/36
G11B 5/09
US Classification:
714723, 714 8, 714 25, 714 42, 714 54, 714719, 369 5317, 369 5332, 369 5335, 369 5344, 360 31, 360 39, 360 53
Abstract:
A technique to detect defects when reading a defect scan pattern stored on a disk in which the detected defects are processed differently depending on which region of a sector the defect is resident. In one implementation, a mask is used to identify the defects of different regions. By differentiating different regions within the sector for defect scan, sync mark and preamble fields may be treated as critical regions so that different defect scan properties may be attributed when performing the defect scan.

Read/Write Channel Coding And Methods For Use Therewith

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US Patent:
8024640, Sep 20, 2011
Filed:
Oct 24, 2007
Appl. No.:
11/923472
Inventors:
William Gene Bliss - Thornton CO, US
Bahjat Zafer - Cupertino CA, US
John P. Mead - Longmont CO, US
Assignee:
Broadcom Corporation - Irvine CA
International Classification:
H03M 13/00
US Classification:
714758, 714752, 714755, 714800
Abstract:
A write channel includes a pre-encoding module that encodes write data to produce pre-encoded data. An error correcting code (ECC) module generates ECC data based on the pre-encoded data. A post-encoding module encodes the ECC data to produce post-encoded data. A combining module combines the pre-encoded data and the post-encoded data for writing to the storage medium.

Baseline Popping Noise Detection Circuit

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US Patent:
20080165444, Jul 10, 2008
Filed:
May 11, 2007
Appl. No.:
11/803082
Inventors:
Bahjat Zafer - Cupertino CA, US
Assignee:
Broadcom Corporation, a California Corporation - Irvine CA
International Classification:
G11B 27/36
US Classification:
360 31
Abstract:
A technique to detect head instability by monitoring for a baseline popping (BLP) noise effect on demodulation bursts read from a disk. In one technique, a digital filter is employed as a moving average filter so that the filtering of the bursts has a zero output from the filter if only the bursts are present. However, when a BLP event occurs, the noise effect causes a non-zero output from the filter. A threshold value is set and when the output of the filter exceeds the threshold value, a BLP indication is noted. Although various filters may be used, in one technique, a filter suitable for use in detecting thermal asperity defects is used for the BLP detection filter.

Multiple Levels Of Guided Scrambling

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US Patent:
20080215893, Sep 4, 2008
Filed:
Dec 28, 2007
Appl. No.:
11/965778
Inventors:
William Gene Bliss - Thornton CO, US
Bahjat Zafer - Cupertino CA, US
Assignee:
BROADCOM CORPORATION - Irvine CA
International Classification:
H04L 9/00
US Classification:
713189
Abstract:
Multiple levels of guided scrambling. Selective scrambling is performed on user data (or any information) that is to be output. The selection of which scrambling is to be employed can be based on whether or not a baseline error constraint and/or randomness constraint is met. The writing of the scrambled user data can be performed in parallel with, during the same time period, and/or simultaneously with the determination of whether or not a baseline error constraint and/or randomness constraint is met. If the constraint is not met, the outputting and/or writing of the scrambled user data can be aborted mid-process.
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Bahjat M Zafer from San Jose, CA, age ~57 Get Report