Patents by Inventor Francis R. Steel, deceased

Francis R. Steel, deceased 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).

  • Patent number: 4968966
    Abstract: A system for transmitting long text messages includes a plurality of transmission cells defining different geographical areas, each having a transmitter for simulcast address transmission at a first data bit rate and for transmitting the address and a message at a second data bit rate higher than the first data bit rate. A paging transceiver generates and transmits an acknowledgment signal in response to receiving a transmitted address at the first data bit rate. Receivers located within each of the transmission cells receive the transmitted acknowledgment signal. An apparatus responsive to the received acknowledgment signal identifies the transmission cell in which the paging transceiver is located effecting the selection of the transmitter in the transmission cell in which the paging transceiver is located to transmit the address and message at the second data bit rate higher than the first data bit rate.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: November 6, 1990
    Assignee: Motorola, Inc.
    Inventors: Leon Jasinski, Francis R. Steel, deceased, Lynne A. Steel, legal representative
  • Patent number: 4942592
    Abstract: A receiver circuit recovers the phase of the carrier of a received MSK signal so that conventional synchronous detection techniques can be employed to demodulate the received signal. A quadrature receiver circuit (204-214) processes the received MSK signal to produce in-phase and quadrature phase baseband signals. These I-channel and Q-channel baseband signals are viewed as one signal which is expressed as a complex number; the I-channel forming the real part and the Q-channel forming the imaginary part. The baseband signal is multiplied (218 and 220) by odd and even orthogonal functions (222 and 224) and then integrated (226 and 227) over odd and even numbered two bit periods, respectively. The odd orthogonal function begins and ends on odd numbered two bit periods of the received MSK signal, while the even orthogonal function begins and ends on even numbered two bit periods. The result of the integration is a single complex number for each bit of the received signal.
    Type: Grant
    Filed: November 27, 1989
    Date of Patent: July 17, 1990
    Assignee: Motorola, Inc.
    Inventors: Clifford D. Leitch, Francis R. Steel, deceased
  • Patent number: 4918437
    Abstract: A system for transmitting long text messages includes a plurality of transmission cells defining different geographical areas, each having a transmitter for simulcast address transmission at a first data bit rate and for transmitting the address and a message at a second data bit rate higher than the first data bit rate. A paging transceiver generates and transmits an acknowledgment signal in response to receiving a transmitted address at the first data bit rate. Receivers located within each of the transmission cells receive the transmitted acknowledgment signal. An apparatus responsive to the received acknowledgment signal identifies the transmission cell in which the paging transceiver is located effecting the selection of the transmitter in the transmission cell in which the paging transceiver is located to transmit the address and message at the second data bit rate higher than the first data bit rate.
    Type: Grant
    Filed: October 13, 1988
    Date of Patent: April 17, 1990
    Assignee: Motorola, Inc.
    Inventors: Leon Jasinski, Francis R. Steel, deceased
  • Patent number: 4888793
    Abstract: A received phases modulated signal includes a plurality of information bits preceeded by three preamble bits. At periodic time intervals, approximately equal to one bit period, the receiver samples the signal and determines the phase angle of each bit at the sampling time. For the preamble bits, the receiver computes the phase error between the first and second preamble bits (A.sub.y -A.sub.x) and the phase error between the second and third preamble bits (A.sub.z -A.sub.y). An overall phase error (PE) is computed by taking the average of these two phase errors. To demodulate a DPSK signal, the average phase error (PE) is added to the phase angle (A.sub.i) of the present information bit. This adjusted phase angle (A.sub.i ') is then compared to the phase angle of the previous bit (A.sub.i -1) to demodulate the signal. To demodulate a PSK signal, the average phase error (PE) multiplied by D is added to the phase angle of the present information bit. This adjusted phase angle (A.sub.
    Type: Grant
    Filed: May 6, 1988
    Date of Patent: December 19, 1989
    Assignee: Motorola, Inc.
    Inventors: Keith A. Chanroo, Francis R. Steel, deceased