Patents by Inventor Siddhartha Ray Chaudhuri

Siddhartha Ray Chaudhuri 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).

  • Radio interface synchronization
    Patent number: 6856611
    Abstract: Various techniques are disclosed for unambiguously determining and tracking frame offset in asynchronous wireless communication user equipment. The user equipment determines the unambiguous connection frame number of a downlink channel. The equipment then determines frame timing information for neighbor cells. The frame timing information for the primary common control physical channel and uplink dedicated physical channels is determined. The frame timing is determined as a coarse resolution frame offset in conjunction with a fine resolution chip offset. The frame numbering information for the uplink and downlink dedicated physical channels and the primary common control physical channel is also determined. Then the frame number and timing information is updated using a counter accurate to one chip resolution. The frame offset is updated if the number of chips underflows or overflows a predetermined window. Frame timing may be updated by updating only the fine chip offset or may be completely determined.
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: February 15, 2005
    Assignee: Qualcomm Incorporated
    Inventors: Siddhartha Ray Chaudhuri, Chih-Ping Hsu, Chalapathi Rao Emani, Jeremy H. Lin, Gurdeep Singh
  • Radio interface synchronization
    Publication number: 20040017777
    Abstract: Various techniques are disclosed for unambiguously determining and tracking frame offset in asynchronous wireless communication user equipment. The user equipment determines the unambiguous connection frame number of a downlink channel. The equipment then determines frame timing information for neighbor cells. The frame timing information for the primary common control physical channel and uplink dedicated physical channels is determined. The frame timing is determined as a coarse resolution frame offset in conjunction with a fine resolution chip offset. The frame numbering information for the uplink and downlink dedicated physical channels and the primary common control physical channel is also determined. Then the frame number and timing information is updated using a counter accurate to one chip resolution. The frame offset is updated if the number of chips underflows or overflows a predetermined window. Frame timing may be updated by updating only the fine chip offset or may be completely determined.
    Type: Application
    Filed: April 11, 2003
    Publication date: January 29, 2004
    Inventors: Siddhartha Ray Chaudhuri, Chih-Ping Hsu, Chalapathi Rao Emani, Jeremy H. Lin, Gurdeep Singh