James H Wilkerson

US Patent:

54540097, Sep 26, 1995

Filed:

Jan 13, 1994

Appl. No.:

8/181318

Inventors:

Larry J. Fruit - Seminole FL
John A. Schachte - Indialantic FL
Charles A. Herbst - Palm Bay FL
James A. Wilkerson - Palm Harbor FL

Assignee:

Scientific-Atlanta, Inc. - Norcross GA

International Classification:

H04B 1713

US Classification:

375202

Abstract:

A satellite communications system for dispersing energy over a wide bandwidth includes a transmitter, a communication link, and a receiver. The transmitter takes a digital data signal and modulates that signal at a prescribed carrier frequency. The modulated digital data signal is then spread over M adjacent digital channels (M. gtoreq. 2 and being an integer multiple of 2), each channel containing the same information, to disperse the energy over a wide frequency range. The spectral bandwidth of the adjacent digital channels is chosen with compressed spacing to conserve bandwidth. Next, the spread modulated data signal is transmitted via the communication link to the receiver. In particular, a waveform generator at the transmitter generates a phase-aligned multichannel frequency diversity waveform according to a data clock at a predetermined phase relationship to the digital data. At the receiver, the spread modulated data signal received is mixed with a despreading waveform generated in a similar manner to the waveform spectrum generated at the transmitter to recover the modulated data signal. The despreading waveform is generated according to a symbol clock signal recovered from the received modulated data signal.

US Patent:

20200412442, Dec 31, 2020

Filed:

Mar 8, 2019

Appl. No.:

16/977029

Inventors:

- Tampa FL, US
James WILKERSON - Oldsmar FL, US
Shawn O'BRIEN - Saint Petersburg FL, US

International Classification:

H04B 7/185

Abstract:

A system for network agnostic satellite communications includes an antenna configured to receive at least one antenna receive beam including multiple receive carriers multiplexed in at least one of frequency or time. The system further includes a signal processor configured to receive the multiple receive carriers and to extract data from at least one receive carrier of the multiple receive carriers. The system further includes an input device configured to receive at least one desirable communication parameter. The system further includes a control processor designed to determine actual parameters corresponding to the multiple receive carriers of the at least one antenna receive beam. The control processor is further designed to select an optimal receive carrier by comparing the at least one desirable communication parameter to the actual parameters. The control processor is further designed to establish a current communication link with the optimal receive carrier.