Patents by Inventor Ian Barlett

Ian Barlett 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 communications apparatus with diversity
    Patent number: 5557603
    Abstract: This invention relates to apparatus and a method for provision of diversity in reception in a communications system such as the GSM cellular radio system. A received call of low quality is received through a first of two antennas (15, 16) and through first of a plurality of receivers (10-14). A spare receiver that is not required for receipt of a call is identified and the spare receiver is switched to receive the call through the second antenna. The spare receiver is tuned to the frequency of the call of low quality and the calls are diversity combined through the first receiver and the spare receiver.
    Type: Grant
    Filed: October 19, 1994
    Date of Patent: September 17, 1996
    Assignee: Motorola, Inc.
    Inventors: Ian Barlett, Peter W. D. Bishop