Justin C Chuang

age ~70

from Newtown, PA

Also known as:
  • Justin Che Chuang
  • Chei W Chuang
  • Che I Chuang
  • Justin C Huang
  • Justin Che

Justin Chuang Phones & Addresses

  • Newtown, PA
  • Brooklyn, NY
  • 13 Bryce Rd, Holmdel, NJ 07733 • 7323321850
  • Eatontown, NJ
  • Middletown, NJ
  • New Brunswick, NJ

Us Patents

  • Error Resilient Transcoding For Video Over Wireless Channels

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  • US Patent:
    6339450, Jan 15, 2002
  • Filed:
    Sep 21, 1999
  • Appl. No.:
    09/399689
  • Inventors:
    Shih-Fu Chang - New York NY
    Justin Che-I Chuang - Holmdel NJ
    Gustavo De Los Reyes - Fair Haven NJ
    Amy Ruth Reibman - Matawan NJ
  • Assignee:
    ATT Corp - New York NY
    Columbia University - New York NY
  • International Classification:
    H04N 704
  • US Classification:
    348470, 348192, 348466
  • Abstract:
    A method and system for maintaining the quality of video transported over wireless channels uses a transcoder to modify and maintain the optical resilience of an encoded bitstream. The transcoder increases the spatial resilience by reducing the number of blocks per slice, and increases the temporal resilience by increasing the proportion of I-blocks that are transmitted in each frame. Also, the transcoder maintains the same input bit rate by dropping less significant coefficients as it increases resilience. The transcoder of the present invention maintains the resilience at an optimal level to accommodate the prevailing channel conditions as measured by the BER of the wireless channel. Rate distortion theory is applied to determine the optimal allocation of bit rate among spatial resilience, temporal resilience and source rate, where it is has been found that the optimal allocation of the present invention (which occurs in near-real time) provides nearly the same result as doing an exhaustive search.
  • Wireless Network Resource Allocation

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  • US Patent:
    6459901, Oct 1, 2002
  • Filed:
    Dec 3, 1999
  • Appl. No.:
    09/453566
  • Inventors:
    Kapil K. Chawla - Scotch Plains NJ
    Justin Che-I Chuang - Holmdel NJ
    Xiaoxin Qiu - Bridgewater NJ
    Nelson Ray Sollenberger - Farmingdale NJ
  • Assignee:
    ATT Corp. - New York NY
  • International Classification:
    H04Q 720
  • US Classification:
    455450, 455 671, 455451, 455452, 370341
  • Abstract:
    This invention provides wireless resource allocation techniques where the wireless network resource allocation is based on maximum system gain. System gain may be the difference between a maximum performance (e. g. , throughput rate) for a requested link and a performance loss of all currently active links affected by the requested link. A currently active link is affected if the requested link is within its link neighborhood. Wireless network resources are allocated to optimize system performance. Inter-base communication may be used to facilitate information exchange among base stations to optimize system performance. The performance loss experienced by any currently active link is called damage to that link. Damage may be determined in a pair-wise fashion based on a nominal performance which may be defined as the performance of a link if interference is experienced only from links which are outside the link neighborhood of the link or as a system parameter. The damage is the difference between the nominal performance and the performance for the link if experiencing interference only from the requested link.
  • System For Near Optimal Joint Channel Estimation And Data Detection For Cofdm Systems

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  • US Patent:
    6477210, Nov 5, 2002
  • Filed:
    Feb 1, 2001
  • Appl. No.:
    09/774802
  • Inventors:
    Justin C. Chuang - Holmdel NJ
    Ye Li - Marietta GA
    Lang Lin - Piscataway NJ
  • Assignee:
    ATT Corp. - New York NY
  • International Classification:
    H03D 100
  • US Classification:
    375340, 370210
  • Abstract:
    Joint channel estimation and maximum likelihood decoding method for Coded Orthogonal Frequency Division Multiplexing (COFDM) systems are presented. Using this method in conjunction with convolutional coding, robust and nearly optimal coherent detection can be achieved in rapid dispersive fading channels. Significant performance gain in packet data throughput is realized in a system with aggressive frequency reuse. A system for estimating channel characteristics in a multicarrier transmission system comprising means for receiving a multicarrier signal, means for applying Fast Fourier transformations to the multicarrier signal, means for estimating channel characteristics of a multicarrier channel over which the multicarrier signal was transmitted using iterative processing and means for decoding the transformed multicarrier signal is presented.
  • Dynamic Frequency Hopping

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  • US Patent:
    6501785, Dec 31, 2002
  • Filed:
    Dec 28, 1999
  • Appl. No.:
    09/472784
  • Inventors:
    Li Fung Chang - Holmdel NJ
    Kapil K. Chawla - Middletown NJ
    Justin C. Chuang - Holmdel NJ
    Zoran Kostic - Holmdel NJ
    Nelson Sollenberger - Tinton Falls NJ
    Xiaoxin Qiu - Bridgewater NJ
  • Assignee:
    ATT Corp. - New York NY
  • International Classification:
    H04J 1306
  • US Classification:
    375133, 455452
  • Abstract:
    This invention provides a dynamic frequency hopping system that utilizes information from multiple base stations. The system assigns frequency hopping patterns based on current interference and traffic environments to avoid interference thus gaining the benefits of interference averaging and interference avoidance. The system imposes less stringent measurement requirements on terminals (wireless mobile devices) because many measurement requirements are replaced by generating estimates based on measurement data received from other base stations within a base station neighborhood. The system may continuously verify that the frequency hopping patterns assigned to the links of the system optimizes system performance. The system compares system performance of possible frequency hopping patterns against currently assigned frequency hopping pattern to optimize system performance. When a request for a link is received, a similar process as above is performed where the request is granted/denied/delayed based on system optimization requirements.
  • Medium Access Control Layer For Packetized Wireless Systems

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  • US Patent:
    6532225, Mar 11, 2003
  • Filed:
    Jul 27, 1999
  • Appl. No.:
    09/361572
  • Inventors:
    Li Fung Chang - Holmdel NJ
    Kapil K. Chawla - Middletown NJ
    Justin C. Chuang - Holmdel NJ
    Xiaoxin Qiu - Bridgewater NJ
    Nelson R. Sollenberger - Tinton Falls NJ
  • Assignee:
    ATT Corp - New York NY
  • International Classification:
    H04Q 728
  • US Classification:
    370341
  • Abstract:
    An arrangement where, in addition to the control channels that are used to set up sessions, there is a logically and physically separate and independent set of control channels that can be used as session control channels. Illustratively, the physical GSM frame arrangement that employs 8 logical slots is used, with one slot both in the uplink and downlink dedicated to these separate control channels. In the downlink, such a control channel provides channel grant information, requests to make and transmit power measurements, poll mobile units, etc. In the uplink, such a control channel can be used to request access to a traffic channel, to report on power measurements, to request special hand-off handling, to respond to polling, etc. Because the uplink session control channel does not need to carry a significant amount of information, the GSM slot can be divided into minislots, with each minislot constituting a session control channel for a group of mobile units.
  • Tdma Communication System Having Enhanced Power Control

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  • US Patent:
    6754506, Jun 22, 2004
  • Filed:
    Feb 16, 2001
  • Appl. No.:
    09/784901
  • Inventors:
    Li Fung Chang - Holmdel NJ
    Kapil K. Chawla - Scotch Plains NJ
    Justin Chi-I Chuang - Holmdel NJ
    Zoran Kostic - Holmdel NJ
    Xiaoxin Qiu - Bridgewater NJ
    Nelson Ray Sollenberger - Farmingdale NJ
    Shailender B. Timiri - Bellevue WA
  • Assignee:
    ATT Wireless Services, Inc. - Redmond WA
  • International Classification:
    H04Q 720
  • US Classification:
    455522, 455 69, 4552451
  • Abstract:
    A TDMA wireless communication system adjusts the power control target and transmission power based upon link quality to enhance voice capacity. The power can be adjusted in response to the average SNIR and number of decoding errors in a link quality reporting period. The power control target can be increased and decreased in discrete intervals after evaluating the number of decoding errors in the reporting period. The transmission power can be adjusted towards the new power control target based upon the average SNIR.
  • Link Adaptation In Wireless Networks For Throughput Maximization Under Retransmissions

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  • US Patent:
    6823005, Nov 23, 2004
  • Filed:
    Aug 9, 1999
  • Appl. No.:
    09/370770
  • Inventors:
    Justin Che-I Chuang - Holmdel NJ
    Xiaoxin Qiu - Bridgewater NJ
  • Assignee:
    ATT Corp - New York NY
  • International Classification:
    H04B 1700
  • US Classification:
    375227, 375346, 455510
  • Abstract:
    The present invention implements a method and system for dynamically adapting the modulation and coding scheme for radio links in a wireless communications network based on a retransmission environment model in order to maximize throughput and most efficiently allocate bandwidth resources. The present invention encompasses a refined calculus and methodology for deriving the link adaptation thresholds in a retransmission environment using a complex model and analysis of the retransmission environment. The present invention holds particular application for wireless data communications as opposed to real time data services because it is based on a retransmission model applicable primarily for data services. A critical component of this new link adaptation system is a âno transmissionâ cutoff mode that is selected for SIR below a base threshold value. This new mode prevents system instability and misallocation of bandwidth in a wireless communication system.
  • Wireless Network Having Joint Power And Data Rate Adaptation

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  • US Patent:
    6950670, Sep 27, 2005
  • Filed:
    Oct 31, 2001
  • Appl. No.:
    10/001650
  • Inventors:
    Li Fung Chang - Holmdel NJ, US
    Kapil K. Chawla - Scotch Plains NJ, US
    Justin Che-I Chuang - Holmdel NJ, US
    Xiaoxin Qiu - Bridgewater NJ, US
  • Assignee:
    AT&T Corp. - New York NY
  • International Classification:
    H04Q007/20
  • US Classification:
    455522, 455500, 455501, 455517, 455507, 455 6711, 455 6712, 455 6713, 455 6714, 455 6715, 375272, 379338
  • Abstract:
    A wireless network includes transmission power and data rate adaptation based upon signal quality experienced by the user.

Youtube

[][MP3] Justin - []

[][MP3] Justin - [... ...

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maimaiSqlupp (Camellia's "Sqleipd*Hiytex" Rem...

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Justin Chuang Contest Winner

The prize is this great, great song.

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Daniel Busch VS Liu Chuang - 2018 Joy Chinese...

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    1h 22m 50s

ASTRI Day Promo - Dr Justin Chuang, VP of Com...

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    1m 29s

maimaiMaster14SS... 100.48 FC

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    2m 50s

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