Patents by Inventor William A. Lindsay-Stewart

William A. Lindsay-Stewart 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 measuring the impulse response of a radio channel
    Patent number: 5371760
    Abstract: A system for measuring a multipath radio channel impulse response by cross-correlating digital samples of a received pseudo-random signal with a digital copy of the transmitted signal. A transmitter within the system repeatedly transmits the pseudo-random signal across a multipath radio channel. A receiver within the system receives the transmitted signal, as well as delayed versions of the original signal, and digitally samples the received signals. A computer then cross-correlates the samples of the received signal with the digital stored version of the transmitted signal to produce a measure of the impulse response of the multipath radio channel.
    Type: Grant
    Filed: April 28, 1993
    Date of Patent: December 6, 1994
    Assignees: Telesis Technologies Laboratory, The United States of America as represented by the Secretary of Commerce
    Inventors: Kenneth C. Allen, William A. Lindsay-Stewart