Patents by Inventor Xiao Y. Guo

Xiao Y. Guo 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).

  • Patent number: 5299192
    Abstract: After sampling a multicarrier signal, groups of multiplex modulated carriers with identical bandwidths are separated by group filters. Clock frequencies of the carriers are then reduced by decimators depending on their respective bandwidths. To separate each of the modulated carriers in each of the groups, a polyphase network architecture is combined with a stage of delay lines for processing separate groups of multiplexed modulated carriers with identical bandwidth by programming a Fourier transform complex multiplying circuit. The demultiplexing devices is programmed to process evolutive traffics of groups of multiplexed carriers by a switching stage linking outputs of the decimation filters to inputs of the delay line stage.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: March 29, 1994
    Assignee: France Telecom
    Inventors: Xiao Y. Guo, Gerard Maral