Resumes
Resumes
Amir Fazlollahi Phones & Addresses
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4153 Hearthside Dr, Wilmington, NC 28412 (910) 392-5290
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4153 Hearthside Dr APT 203, Wilmington, NC 28412 (910) 392-5290
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Dallas, TX
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Sunnyvale, CA
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Burlingame, CA
Business Records
Name / Title
Company / Classification
Phones & Addresses
Principal
Carolina Leathers
Ret Women's Accessories/Specialties
Ret Women's Accessories/Specialties
3500 Oleander Dr, Wilmington, NC 28403
Publications
Us Patents
Synchronizing Adsl Annex C Transceivers To Ttr
View pageUS Patent:
7376157, May 20, 2008
Filed:
Jun 28, 2002
Appl. No.:
10/187384
Inventors:
Amir Fazlollahi - Palo Alto CA, US
Guozhu Long - Fremont CA, US
Guozhu Long - Fremont CA, US
Assignee:
Centillium Communications, Inc. - Fremont CA
International Classification:
H04J 3/06
US Classification:
370514, 370512, 370350
Abstract:
Techniques for establishing TTR indication in ADSL Annex C based communication systems are disclosed. The techniques enable, for example, hyperframe alignment and synchronized initialization procedures (e. g. , G. hs).
Isdn Crosstalk Cancellation In A Dsl System
View pageUS Patent:
7577084, Aug 18, 2009
Filed:
Apr 30, 2004
Appl. No.:
10/836954
Inventors:
Xiangguo Tang - Union City CA, US
Guozhu Long - Fremont CA, US
Amir H. Fazlollahi - Pleasanton CA, US
Guozhu Long - Fremont CA, US
Amir H. Fazlollahi - Pleasanton CA, US
Assignee:
Ikanos Communications Inc. - Fremont CA
International Classification:
H04J 1/12
US Classification:
370201, 379417
Abstract:
To reduce the ISDN crosstalk in an incoming DSL signal, a crosstalk canceller observes at least a portion of the crosstalk signal and reproduces an estimate of the crosstalk signal for at least a portion of that signal within the DSL band. The crosstalk canceller applies a canceling signal based on the estimated crosstalk signal to reduce the crosstalk in the received DSL signal.
Dynamic Transmitter Noise Level Adjustment For Digital Subscriber Line Systems
View pageUS Patent:
8238450, Aug 7, 2012
Filed:
Jan 19, 2010
Appl. No.:
12/689875
Inventors:
Sanjay Gupta - Pleasanton CA, US
Amir H. Fazlollahi - Santa Clara CA, US
Guozhu Long - Fremont CA, US
Ying Li - Shenzhen, CN
Raphael Jean Cendrillon - Hong Kong, CN
Amir H. Fazlollahi - Santa Clara CA, US
Guozhu Long - Fremont CA, US
Ying Li - Shenzhen, CN
Raphael Jean Cendrillon - Hong Kong, CN
Assignee:
Futurewei Technologies Inc. - Plano TX
International Classification:
H04B 3/00
US Classification:
375257, 375219, 375220, 375221, 375222, 375225, 375227, 375258, 375260, 375261, 375295, 375296, 375298, 375316, 370206, 370207, 370208, 370210, 370272, 370273, 370276, 370297, 370343, 370480, 455 39, 455 6713, 455 69, 455 73, 455 91, 4551143, 4551151, 4551153, 4552263, 379 2202, 379 2208, 379 24, 379 2601, 379 2703, 379 9301, 725111
Abstract:
An apparatus comprising an artificial noise (AN) controller coupled to a digital subscriber line (DSL) transmitter and configured to adjust an AN level for a signal transmitted by the DSL transmitter, wherein the AN level is adjusted based on an actual signal to noise ratio (SNR) of the signal from the receiver to achieve a desired SNR for the signal. Also disclosed is a method comprising maintaining a data rate in a line at about a desired level by adjusting an AN level in a transmitted signal based on a SNR of a received signal.
Class-G Line Driver Control Signal
View pageUS Patent:
8446219, May 21, 2013
Filed:
Feb 1, 2010
Appl. No.:
12/697913
Inventors:
Hessam Mohajeri - Los Altos Hills CA, US
Amir H. Fazlollahi - Santa Clara CA, US
Amir H. Fazlollahi - Santa Clara CA, US
Assignee:
Futurewei Technologies, Inc. - Plano TX
International Classification:
H03F 3/20
US Classification:
330136, 330297
Abstract:
An apparatus comprising an input, a control signal generator coupled to the input and having a control signal generator output, and an amplifier coupled to the control signal generator output, wherein a voltage supplied to the amplifier is switched based on the control signal generator output, and wherein the control signal generator output is based on a data signal in the input. Also included is an apparatus comprising circuitry configured to implement a method comprising detecting an incoming signal, calculating a derivative of the incoming signal, estimating a future incoming signal based on the derivative of the incoming signal and a time step, and providing the estimated future incoming signal to switch between a first supply voltage and a second supply voltage prior to or concurrent with an arrival of the future incoming signal at the switch, wherein the incoming signal and the future incoming signal are analog signals.
Extremely High Speed Broadband Access Over Copper Pairs
View pageUS Patent:
8537912, Sep 17, 2013
Filed:
Feb 24, 2011
Appl. No.:
13/034353
Inventors:
Guozhu Long - Fremont CA, US
Amir H. Fazlollahi - San Jose CA, US
Liming Fang - Shenzhen, CN
Yuchen Jia - Sihui, CN
Amir H. Fazlollahi - San Jose CA, US
Liming Fang - Shenzhen, CN
Yuchen Jia - Sihui, CN
Assignee:
Futurewei Technologies, Inc. - Plano TX
International Classification:
H04K 1/10
US Classification:
375260, 375219, 375220, 375257, 375267, 375295, 375299, 375316, 375340, 375347, 455101, 455132, 455500, 4555621, 370272, 370273, 370276, 370297, 370334, 370464, 370480, 341173, 341180, 379 9301
Abstract:
Disclosed is an apparatus that includes a plurality of parallel digital signal transmitters that each receive one of a plurality of digital sub-signals wherein each of the plurality of digital signal transmitters is configured to transmit one of the plurality of digital sub-signals that each have about the same bandwidth. The apparatus also includes a combiner coupled to the transmitters and configured to shift some of the plurality of digital sub-signals and to combine the plurality of shifted digital sub-signals into a combined digital signal that has a total bandwidth of that is approximately equal to the sum of the bandwidths of the plurality of digital sub-signals. The total bandwidth comprises a plurality of shifted bandwidths of the plurality of digital sub-signals at about the same offset with respect to each other. The combined digital signal is transmitted over a digital subscriber loop.
Fdr Single Ended Line Testing (Selt) System And Method For Dsl Modems
View pageUS Patent:
20060251160, Nov 9, 2006
Filed:
Jan 25, 2006
Appl. No.:
11/339865
Inventors:
Amir Fazlollahi - San Jose CA, US
Xiangguo Tang - Union City CA, US
Xiangguo Tang - Union City CA, US
International Classification:
H04B 1/38
US Classification:
375222000
Abstract:
A single ended line testing (SELT) method using a Frequency-Domain Reflectometry (FDR) that uses one or more echo signals originated by transmitting a periodic multi-tone sign, e.g., a REVERB signal, reflected from the hybrid and analyzes it in frequency domain. The REVERB signal is part of the ADSL modem training signal. Therefore the invention can be simply implemented as part of the DMT-based DSL modem because transmitting a multi-tone signal and capturing the frequency response of echo are readily available through the inverse fast Fourier transform/fast Fourier transform (IFFT/FFT) blocks that are used for modulation and demodulation.
Fast Dynamic Noise Detection/Adaptation System For Dsl Modems
View pageUS Patent:
20070258527, Nov 8, 2007
Filed:
May 7, 2007
Appl. No.:
11/745333
Inventors:
Victor Simileysky - San Jose CA, US
Amir Fazlollahi - San Jose CA, US
Amir Fazlollahi - San Jose CA, US
Assignee:
Centillium Communications, Inc. - Fremont CA
International Classification:
H04L 27/28
US Classification:
375260000
Abstract:
A systems and a method for a DMT-based DSL modem to detect time-varying noise dynamically during transmission and adapt to its rapid changes promptly by increasing or reducing data rate while maintaining the transmission and utilizing maximum channel capacity. A DMT-based modem reserves a first set of sub-channels to detect and measure the time-varying noise. The modem further provides reliable communications for control messages through a second set of sub-channels. The control messages are used to adjust communication to adapt to the new noise conditions over all sub-channels.
Methods And Systems For Peak-To-Average Power Reduction Without Reducing Data Rate
View pageUS Patent:
20130195213, Aug 1, 2013
Filed:
Jan 31, 2012
Appl. No.:
13/363005
Inventors:
Amir H. Fazlollahi - San Jose CA, US
Yuchen Jia - Santa Clara CA, US
Yuchen Jia - Santa Clara CA, US
Assignee:
FUTUREWEI TECHNOLOGIES, INC. - Plano TX
International Classification:
H04B 7/02
US Classification:
375267
Abstract:
A transmitter for performing multicarrier modulation comprising a processing unit configured to generate a multicarrier data signal comprising a plurality of subcarriers, wherein each of the plurality of subcarriers represents at least one data bit of a plurality of data bits, select a subset of the subcarriers based on signal quality information about one or more of the subcarriers, construct a kernel signal comprising the subset of subcarriers, and create a digital signal comprising combining the multicarrier data signal and a peak-to-average ratio (PAR) reduction signal based on the kernel signal, wherein a PAR of the digital signal is less than a PAR of the multicarrier data signal.