Patents by Inventor Alex Hietala

Alex Hietala 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).

  • Method and apparatus for receiving a signal
    Patent number: 6597748
    Abstract: Apparatus 20, 30, 50, 60 for receiving a carrier signal modulated by a wanted signal, the modulated carrier signal occupying one of a plurality of channels whose central frequencies are separated from one another by a fixed frequency referred to as the channel spacing, the apparatus including a local oscillator 28 for generating first and second signals at a frequency which is not an integral multiple of half the channel spacing whereby when the received carrier signal is mixed with the first and second signals, a complex, digital Very Low Intermediate Frequency (VLIF) signal is generated in which the wanted signal is centred about a VLIF which is slightly larger than half the channel spacing.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: July 22, 2003
    Assignee: Motorola, Inc.
    Inventors: Alex Hietala, Nadim Khlat, Patrick Clement