Patents by Inventor Chi-Chen Lai

Chi-Chen Lai 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).

  • Pipeline-based reconfigurable mixed-radix FFT processor
    Patent number: 7849123
    Abstract: The present invention discloses a fast Fourier transform (FFT) processor based on multiple-path delay commutator architecture. A pipelined architecture is used and is divided into 4 stages with 8 parallel data path. Yet, only three physical computation stages are implemented. The process or uses the block floating point method to maintain the signal-to-noise ratio. Internal storage elements are required in the method to hold and switch intermediate data. With good circuit partition, the storage elements can adjust their capacity for different modes, from 16-point to 4096-point FFTs, by turning on or turning off the storage elements.
    Type: Grant
    Filed: January 8, 2007
    Date of Patent: December 7, 2010
    Assignee: National Chiao Tung University
    Inventors: Chi-Chen Lai, Wei Hwang
  • Pipeline-based reconfigurable mixed-radix FFT processor
    Publication number: 20080155003
    Abstract: The present invention discloses a fast Fourier transform (FFT) processor based on multiple-path delay commutator architecture. A pipelined architecture is used and is divided into 4 stages with 8 parallel data path. Yet, only three physical computation stages are implemented. The process or uses the block floating point method to maintain the signal-to-noise ratio. Internal storage elements are required in the method to hold and switch intermediate data. With good circuit partition, the storage elements can adjust their capacity for different modes, from 16-point to 4096-point FFTs, by turning on or turning off the storage elements.
    Type: Application
    Filed: January 8, 2007
    Publication date: June 26, 2008
    Applicant: National Chiao Tung University
    Inventors: Chi-Chen Lai, Wei Hwang