Patents by Inventor Zhiyong Bu

Zhiyong Bu 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).

  • Equalized parallel interference cancellation EPIC for CDMA systems
    Patent number: 7242708
    Abstract: A new multiuser detection scheme EPIC (Equalized Parallel Interference Cancellation) is disclosed. A rake receiver signal zRake output by a rake receiver is detected, which receives a spread spectrum composite signal r comprising plural user signals b1,b2, . . . ,bK that have been spread with spreading codes. At first, first hard-decision values bRake are produced on the basis of the rake receiver outputs. Then, first parallel interference cancellation values are produced on the basis of the first hard-decision values, and second hard-decision values bPIC are produced on the basis of the first parallel interference cancellation values. After that, the first and second hard-decision values are combined for producing first combination values, and second parallel interference cancellation values are on the basis of the first combination values.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: July 10, 2007
    Assignee: Nokia Corporation
    Inventors: Haifeng Wang, Zhiyong Bu, Jorma Lilleberg