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Vedavalli G Krishnan

from Oakland, CA
Age ~79
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Also known as:
Vedavalli Gomatan Krishnan, Vedavalli Te Krishnan, Vedavalli H Krishnan, Veda G Krishnan, Vedall G Krishnan, Krishnan U Vedavalli, Vedavalli G Krishnam, I Krishnan, Vedavalli N, Krishnan U Vedavall
Phone and address:
401 Lee St, Oakland, CA 94610
(510) 286-9839
Related to:
Khariza R Estacio, 35Yadugiri MandayamLoqi J Tamaroon, 58Meera G Krishnan, 48Mandayam G Krishnan, 80Meera Gomatam Ronfeldt, 48Stephen E Ronfeldt, 82Munlachmi Krishnan, 52Babbi KrishnanS Ronfeldt, 82Barbi KrishnanHeidi M Ronfeldt, 55Matthew S Ronfeldt, 52
Connected to:
Ajit Krishnan, 45Amar M Krishna, 42Amar Krishnaswamy, 68Amita Krishnan, 38Anagha C Krishnan, 32Ananth Krishnamurthy, 52Anitha Krishnakumar, 44Anjana Krishnamoorthy, 36Anjana Krishnan, 45Anoop Krishnamurthy, 39

Vedavalli Krishnan Phones & Addresses

  • 401 Lee St, Oakland, CA 94610 (510) 286-9839
  • Crockett, CA
  • Berkeley, CA
  • Fremont, CA
  • 7604 Sandy Lake Ct, Raleigh, NC 27613 (919) 788-9099
  • Miami Lakes, FL
  • Hialeah, FL

Work

Company: U.c. berkeley Aug 2009 Position: Graduate student researcher

Education

Degree: Ph. D School / High School: University of California, Berkeley 2009 to 2013 Specialities: Electrical Engineering

Skills

Product R&D • Simulation • Prototyping • Patents • Quality Assurance • Matlab • Tesla Turbines • Data Communication Modems • Whole Blood Counters • Optical Microscopy • Digital Image Processing • Audio Processing • Firmware • Autocad • Comsol • Circuits • Analog and Digital Design • Transducers • Power Systems • Technical Standards

Industries

Research

Resumes

Resumes

Vedavalli Krishnan Photo 1

Research And Development Engineer

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Location:
San Francisco, CA
Industry:
Research
Work:
U.C. Berkeley since Aug 2009
Graduate Student Researcher
Innoviti Embedded Solutions Jan 2007 - May 2009
V.P. Engineering
Extandon Inc May 2003 - Jan 2007
Engineering Manager
Intel Corporation 2000 - 2003
Manager
Racal Datacom Oct 1978 - Jul 1997
Senior Fellow
Education:
University of California, Berkeley 2009 - 2013
Ph. D, Electrical Engineering University of Washington 1972 - 1973
MSEE, Semiconductor, bioinstrumentation, satellite communicationsDesertation title - "Non-Invasive Hybrid Tip Oximeter" - As RA I did the original concept design and fabrication of the Hybrid Tip Oximeter and verified the theory against Heamatology equipments. After masters thesis , published 2 more papers in IEEE trans. Biomed Engg. At present this type of oximeters are in use .
Skills:
Product R&D
Simulation
Prototyping
Patents
Quality Assurance
Matlab
Tesla Turbines
Data Communication Modems
Whole Blood Counters
Optical Microscopy
Digital Image Processing
Audio Processing
Firmware
Autocad
Comsol
Circuits
Analog and Digital Design
Transducers
Power Systems
Technical Standards

Publications

Us Patents

Constellation Generation And Re-Evaluation

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US Patent:
6721357, Apr 13, 2004
Filed:
May 18, 2000
Appl. No.:
09/572860
Inventors:
Bo Zhang - Raleigh NC
Sigang Qiu - Raleigh NC
Vedavalli Gomatam Krishnan - Raleigh NC
Xuefeng Jiang - Newark CA
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
H04L 516
US Classification:
375222, 375296
Abstract:
A method of generating a data constellation at a client modem is provided whereby an optimum distance between data constellation data points may be calculated for a predetermined, acceptable error probability. An iterative process may be carried out using proposed data constellations which may be used to provide factors for calculating corrected constellations. Once a constellation is generated to satisfy the required probability of error, the constellation may be re-evaluated using CRC errors and detected noise variance at the client modem. Based upon predetermined levels of noise variance and CRC error, the constellation may be regenerated to operate at either a higher bit rate or a lower bit rate.

Receiver Codec Super Set Constellation Generator

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US Patent:
6721363, Apr 13, 2004
Filed:
May 26, 2000
Appl. No.:
09/579529
Inventors:
Sigang Qiu - Raleigh NC
Vedavalli Gomatam Krishnan - Raleigh NC
Bo Zhang - Raleigh NC
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
H04B 1404
US Classification:
375242, 375222
Abstract:
A technique is proposed to accurately estimate the Network CODEC levels for each PCM code a server modem generates. These levels are affected by the digital impairments such as Digital attenuation PAD in the trunk, the Robbed Bit Signaling, the type of CODEC (-law or a-lawâor non standard), and by analog impairments such as loop distortion, noise, inter-modulation distortion, echo. At client modem equalizer output good estimates for these levels are derived. By detecting RBS pattern of the trunk, and using averages of decode levels of similar RBS slots, more accurate data points are obtained. By further replacing these levels with the closest CODEC receive levels, good accuracy is obtained. Non-monotonic points are detected and eliminated. An upper limit is set for constellation points to avoid saturation of the receiver.

Pad And Codec Detection

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US Patent:
6724814, Apr 20, 2004
Filed:
Jun 22, 2000
Appl. No.:
09/598934
Inventors:
Jeffrey Allan Green - Wake Forest NC
Vedavalli Gomatam Krishnan - Raleigh NC
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
H04B 138
US Classification:
375222, 375220, 375224
Abstract:
A Digital Impairment detection scheme which is designed for providing reliable estimate of digital impairments such as PAD, and CODEC type in the presence of digital impairments such as Robbed Bit Signalling and non G. 711 complaint network CODECs and analog impairments such as IMD, noise and changing line conditions. This estimate is used to derive optimum transmit symbol constellations for a modem connected digitally to a trunk so as to maximize its data transmission rate.

Use Of Lower Bandwidth Technology To Determine Channel Capability For Supporting Higher Bandwidth Technology

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US Patent:
7133497, Nov 7, 2006
Filed:
Mar 29, 2002
Appl. No.:
10/112275
Inventors:
Karl I. Nordling - Raleigh NC, US
Vedavalli G. Krishnan - Raleigh NC, US
Mandayam G. Krishnan - Raleigh NC, US
Fred Schuckert - Redwood City CA, US
Wesley H. Smith - Raleigh NC, US
Don Carmon - Raleigh NC, US
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
H04M 1/24
H04M 3/08
H04M 3/22
H04L 1/00
H04L 12/26
US Classification:
379 104, 379 101, 379 103, 379 22, 370241, 370252
Abstract:
Lower bandwidth technology is used to determine whether a communication channel can support higher bandwidth technology. A signal generator generates a series of test signals that are associated with the higher bandwidth technology. The test signals are sampled to produce aliases that can be analyzed with lower bandwidth technology. Modem parameters are accessed from a modem's memory. The modem parameters are compared with a database containing information about whether a set of modem parameters indicates that a telephone local can support broadband devices.

Receiver Codec Super Set Constellation Generator

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US Patent:
7339996, Mar 4, 2008
Filed:
Mar 19, 2004
Appl. No.:
10/804914
Inventors:
Sigang Qiu - Raleigh NC, US
Vedavalli Gomatam Krishnan - Raleigh NC, US
Bo Zhang - Raleigh NC, US
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
H04B 14/04
H04L 5/16
US Classification:
375242, 375222
Abstract:
A technique is proposed to accurately estimate the Network CODEC levels for each PCM code a server modem generates. These levels are affected by the digital impairments such as Digital attenuation PAD in the trunk, the Robbed Bit Signaling, the type of CODEC (μ-law or a-law—or non standard), and by analog impairments such as loop distortion, noise, inter-modulation distortion, echo. At client modem equalizer output good estimates for these levels are derived. By detecting RBS pattern of the trunk, and using averages of decode levels of similar RBS slots, more accurate data points are obtained. By further replacing these levels with the closest CODEC receive levels, good accuracy is obtained. Non-monotonic points are detected and eliminated. An upper limit is set for constellation points to avoid saturation of the receiver.

Inter-Modulation Distortion Compensation

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US Patent:
7366470, Apr 29, 2008
Filed:
Jun 21, 2000
Appl. No.:
09/598680
Inventors:
Jeffrey Allan Green - Wake Forest NC, US
Vedavalli Gomatam Krishnan - Raleigh NC, US
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
H04B 1/00
H04B 1/10
H04B 1/38
H04L 25/34
H03D 1/04
US Classification:
455 631, 455296, 455303, 375286, 375346, 375222, 379 9301, 379400
Abstract:
An Inter-modulation distortion measurement and correction method which could be applied over a communication channel that is a combination of either or both analog and digital channels. This method is applicable for a communication system between a modem pair.

Methods And Apparatuses For Determining Loop Characteristics Using An Extended Voice-Band Modem

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US Patent:
7406157, Jul 29, 2008
Filed:
Sep 3, 2003
Appl. No.:
10/655094
Inventors:
Sigang Qiu - Raleigh NC, US
Prashant Pratap Tawade - Raleigh NC, US
Vedavalli G. Krishnan - Raleigh NC, US
Wesley H. Smith - Raleigh NC, US
Mandayam Krishnan - Raleigh NC, US
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
H04M 1/24
H04M 3/08
H04M 3/22
H04K 9/00
US Classification:
379 104, 379 103, 379 2202, 379 2708, 375243, 375245, 375260, 375316
Abstract:
Embodiments of the invention provide methods for determining the characteristics of a local loop using the multi-carrier tones of a DSL activation process. For one embodiment, one or more sets of downstream multi-carrier tones of a digital subscriber line activation process are received at an extended voice-band modem and are capable of transmitting upstream multi-carrier tones of the digital subscriber line activation process over a local loop. The downstream carrier tones and the upstream carrier tones are folded into a first multi-tone signal and a second multi-tone signal, respectively, each having a plurality of component signals within the spectrum band of the extended voice-based modem. The total signal power of the first multi-tone signal is divided by the power of one of the plurality of component signals of the second multi-tone signal to determine a ratio value. The ratio value is used to determine a characteristic of the local loop.

Pad And Codec Detection

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US Patent:
7424051, Sep 9, 2008
Filed:
Mar 19, 2004
Appl. No.:
10/805102
Inventors:
Jeffrey Allan Green - Wake Forest NC, US
Vedavalli Gomatam Krishnan - Raleigh NC, US
Assignee:
Intel Corporation - Santa Clara CA
International Classification:
H04B 1/38
H04L 5/16
US Classification:
375222, 375220, 375224
Abstract:
A Digital Impairment detection scheme which is designed for providing reliable estimate of digital impairments such as PAD, and CODEC type in the presence of digital impairments such as Robbed Bit Signalling and non G. 711 complaint network CODECs and analog impairments such as IMD, noise and changing line conditions. This estimate is used to derive optimum transmit symbol constellations for a modem connected digitally to a trunk so as to maximize its data transmission rate.
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Vedavalli G Krishnan from Oakland, CA, age ~79 Get Report