Patents by Inventor Dave Causey

Dave Causey 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 for testing soft handoff functionality of a mobile station used for a code division multiple access (CDMA) mobile communication system
    Patent number: 6687500
    Abstract: A base station simulator (400) provides testing of soft handoff functionality for a mobile station (400), such as a mobile telephone, between a first base station (BS1) and a second base station (BS2). The base station simulator (400) includes two digital baseband processors (402) and (404) for generating forward transmission signals to simulate the signals from the two base stations (BS1) and (BS2). The two digital base station signals have gain digitally controlled using multipliers (407-409) and the signals are added together digitally using a digital adder (410) before conversion to an analog signal using an A/D converter (412). The base station simulator (400) avoids the additional cost and space required for the redundant parts from two separate base station simulators, as conventionally used for testing soft handoff functionality.
    Type: Grant
    Filed: September 21, 2000
    Date of Patent: February 3, 2004
    Inventor: Dave Causey