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Pornchai Pawawongsak Phones & Addresses

  • Austin, TX
  • San Diego, CA
  • Lake Grove, NY
  • Lake Ronkonkoma, NY
  • Los Angeles, CA
  • 13427 Athens Trl, Austin, TX 78729

Publications

Us Patents

Fourier Transform Processing And Twiddle Factor Generation

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US Patent:
8386552, Feb 26, 2013
Filed:
Sep 17, 2008
Appl. No.:
12/211892
Inventors:
Ning Chen - Austin TX,
Jayakrishnan C. Mundarath - Austin TX,
Pornchai Pawawongsak - Austin TX,
Assignee:
Freescale Semiconductor, Inc. - Austin TX
International Classification:
G06F 15/00
US Classification:
708405, 708400, 708403, 708404
Abstract:
In a data processing system, having a twiddle factor unit, a method for performing a mixed-radix discrete Fourier transform (DFT) having a block size, N, and a maximum block size, Nmax, wherein the maximum block size includes a radix that is not a power of 2 is provided. The method includes receiving a delta value at an input of the twiddle factor unit, the delta value representing a ratio of a modified maximum bock size to the block size, wherein the modified maximum block size is a power of 2. The method further includes using the delta value to obtain a step size for generating indices of a look-up table stored within the twiddle factor unit, wherein the look-up table stores real and imaginary components of twiddle factors corresponding to a set of block sizes of the DFT.

Techniques For Extracting A Control Channel From A Received Signal In A Wireless Communication System

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US Patent:
8379671, Feb 19, 2013
Filed:
Jan 30, 2009
Appl. No.:
12/363634
Inventors:
Ning Chen - Austin TX,
Pornchai Pawawongsak - Austin TX,
Assignee:
Freescale Semiconductor, Inc. - Austin TX
International Classification:
H04J 3/24
US Classification:
370474
Abstract:
A technique for extracting a control channel from a received signal includes storing interleaved control channel elements of the received signal in a control channel region of a memory. First addresses for first elements that are included in a first control channel are then generated using a first circuit. Finally, the respective first elements are read, using a second circuit, from the control channel region of the memory according to the generated first addresses to provide the first control channel in a deinterleaved form.
Pornchai Pawawongsak from Austin, TX, age ~51 Get Report