Patents by Inventor Yueh-Shan Chang

Yueh-Shan 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).

  • System and method for efficient wideband code division multiplexing in subband domain
    Patent number: 10511380
    Abstract: System and method for efficient wideband code division multiplexing in subband domain include: aggregating L analog signals received from L antenna elements into a single aggregated signal, by using code division multiplexing with L code words, where L is an integer greater than 1; converting the single aggregated analog signal to a single aggregated digital signal, by a single analog-to-digital converter (ADC); channelizing the single aggregated digital signal into N subbands, where N is an integer greater than 1; performing circular convolutions of the N subbands with the L code words to demultiplex the channelized signal into L elements per subband; and routing each subband signal of the L elements to N beamforming circuits for performing beamforming on each of the N subbands.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: December 17, 2019
    Assignee: RAYTHEON COMPANY
    Inventors: Jason A. Ching, Hao O. Phung, Yueh-Shan Chang
  • SYSTEM AND METHOD FOR EFFICIENT WIDEBAND CODE DIVISION MULTIPLEXING IN SUBBAND DOMAIN
    Publication number: 20190190595
    Abstract: System and method for efficient wideband code division multiplexing in subband domain include: aggregating L analog signals received from L antenna elements into a single aggregated signal, by using code division multiplexing with L code words, where L is an integer greater than 1; converting the single aggregated analog signal to a single aggregated digital signal, by a single analog-to-digital converter (ADC); channelizing the single aggregated digital signal into N subbands, where N is an integer greater than 1; performing circular convolutions of the N subbands with the L code words to demultiplex the channelized signal into L elements per subband; and routing each subband signal of the L elements to N beamforming circuits for performing beamforming on each of the N subbands.
    Type: Application
    Filed: December 20, 2017
    Publication date: June 20, 2019
    Inventors: Jason A. Ching, Hao O. Phung, Yueh-Shan Chang