Patents by Inventor Tae-Ryun Chang

Tae-Ryun Chang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20090175387
    Abstract: A method and apparatus for decoding encoded data bits of a wireless communication transmission are provided. A set of a-priori bit values corresponding to known bit values of the encoded data bits may be generated. Decoding paths that correspond to decoded data bits that are inconsistent with the a-priori bit values may be removed from the possible decoding paths to consider, and decoding the encoded data bits by selecting a decoding path from remaining decoding paths of the possible decoding paths that were not removed. Multiple hypotheses, each corresponding to a different set of a-prior bit values may be evaluated, with the decoded data for a hypothesis selected based on the evaluation output for further processing.
    Type: Application
    Filed: January 4, 2008
    Publication date: July 9, 2009
    Applicant: QUALCOMM INCORPORATED
    Inventors: Jong Hyeon Park, Bok Tae Sim, Je Woo Kim, Serguei A. Glazko, Sameer Nanavati, Ju Won Park, Chun Woo Lee, Tae Ryun Chang
  • Publication number: 20090175394
    Abstract: A synchronization and detection method in a wireless device may include performing coarse detection and synchronization with respect to a received signal. The synchronization and detection method may also include performing fine detection and synchronization for acquisition of the received signal. Results of the coarse detection and synchronization may be used for the fine detection and synchronization. The synchronization and detection method may also include performing tracking mode processing when the acquisition of the received signal has been achieved.
    Type: Application
    Filed: January 4, 2008
    Publication date: July 9, 2009
    Applicant: QUALCOMM INCORPORATED
    Inventors: Jong Hyeon Park, Bok Tae Sim, Tae Ryun Chang, Je Woo Kim, Ju Won Park, Chae Kwan Lee, Sameer Nanavati
  • Publication number: 20090175388
    Abstract: A method and apparatus for decoding encoded data bits of a wireless communication transmission are provided. A set of a-priori bit values corresponding to known bit values of the encoded data bits may be generated. Decoding paths that correspond to decoded data bits that are inconsistent with the a-priori bit values may be removed from the possible decoding paths to consider, and decoding the encoded data bits by selecting a decoding path from remaining decoding paths of the possible decoding paths that were not removed.
    Type: Application
    Filed: January 4, 2008
    Publication date: July 9, 2009
    Applicant: QUALCOMM INCORPORATED
    Inventors: Tae Ryun Chang, Jong Hyeon Park, Ju Won Park, Bok Tae Sim, Chun Woo Lee, Je Woo Kim
  • Publication number: 20090175364
    Abstract: In accordance with a method for processing a received orthogonal frequency division multiple access (OFDMA) signal that comprises a duplicated signal, sub-carriers within the OFDMA signal may be arranged into a duplicated format. The OFDMA signal may be equalized and combined after the sub-carriers have been arranged into the duplicated format. The equalizing and combining may be performed in accordance with a maximum ratio combining (MRC) scheme. The OFDMA signal may be demapped after the equalizing and combining is performed.
    Type: Application
    Filed: January 4, 2008
    Publication date: July 9, 2009
    Applicant: QUALCOMM INCORPORATED
    Inventors: Jong Hyeon Park, Tae Ryun Chang, Je Woo Kim
  • Patent number: 6593882
    Abstract: There are provided adaptive beamforming algorithms for an adaptive array smart antenna. According to one embodiment of the present invention, the adaptive array smart antenna constructs an input signal matrix with a predetermined number of input signals, computes a transmission signal matrix that minimizes a cost function using a first steering matrix set to an initial value and the input signal matrix, computes a second steering matrix that minimizes the cost function using the transmission signal matrix and the input signal matrix, maps the second steering matrix on a unit circle, constructs a third steering matrix with the mapped values, normalizes the third steering matrix and determining whether the third steering matrix converges, and demodulates data using the transmission signal matrix if the third steering matrix converges.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: July 15, 2003
    Assignee: TeleCIS Technologies, Inc.
    Inventors: Je-Woo Kim, Jong-Hyeon Park, Bok-Tae Shim, Sang-Hoon Roh, Tae-Ryun Chang