Communication system for two-way exchange of information

• US 20030016735A1
• Filed: 07/23/2001
• Published: 01/23/2003
• Est. Priority Date: 07/23/2001
• Status: Abandoned Application

• Current Assignee: P.J. Edmonson Ltd.
• Original Assignee: P.J. Edmonson Ltd.
• Inventors: Edmonson, Peter J., Campbell, Colin K.
• Application Number:
  US09/909,969
• Publication Number:
  US 20030016735A1
• Time in Patent Office: Days
• US Class Current: 375/219
• CPC Class Codes: G08C 17/02 using a radio link

Abstract

A communication system for two-way exchange of information using a binary coded waveform has a base unit operable to transmit and receive electromagnetic radiation waveforms modulated by binary coded voice or data message signals, and a hybrid unit remote from the base unit and operable to receive and transmit binary coded electromagnetic radiation waveforms from and to the base unit.

The hybrid unit has a first surface acoustic wave device with an input to receive a binary coded electromagnetic radiation waveform from the base unit and cause a corresponding binary coded surface acoustic wave to travel from the input to an output thereof and be reflected back to the input.

A first transducer is connected to the output to receive further information from a source thereof and modify the reflected surface acoustic waveform, whereby the reflected surface acoustic waveform incorporates such further information and becomes a modified reflected surface acoustic waveform which travels to the input and then travels as a modified binary coded electromagnetic waveform to the base unit.

Claims

1. A communication system for two-way exchange of information using a binary coded waveform, said system having:

a base unit operable to transmit and receive electromagnetic radiation waveforms modulated by binary coded voice or data message signals,

a hybrid unit remote from the base unit and operable to receive and transmit binary coded electromagnetic radiation waveforms from and to the base unit,

said hybrid unit having a first surface acoustic wave device with an input to receive a binary coded electromagnetic radiation waveform from the base unit and cause a corresponding binary coded surface acoustic wave to travel from the input to an output thereof and be reflected back to the input, and

a first transducer connected to said output to receive further information from a source thereof and modify said reflected surface acoustic waveform whereby said reflected surface acoustic waveform incorporates such further information and becomes a modified reflected surface acoustic waveform which travels to said input and then travels as a modified binary coded electromagnetic waveform to the base unit.

2. A communication system according to claim 1 wherein the first transducer is a microphone.

3. A communication system according to claim 1 wherein the hybrid unit also has a second surface acoustic wave device with an input to receive said binary coded electromagnetic radiation waveform from the base unit and cause a corresponding binary coded surface acoustic wave to travel from the input to an output thereof, the output of the second surface acoustic wave device comprising a filter arrangement to decode the binary coded electromagnetic radiation waveform, and a second transducer which is appropriately actuated by the decoded output.

4. A communication system according to claim 3 wherein the second transducer is a loud speaker.

5. A communication system according to claim 1 wherein the hybrid unit also has a second surface acoustic wave device with an input to receive said binary coded electromagnetic radiation waveform from the base unit and cause a corresponding binary coded surface acoustic wave to travel from the input to an output thereof, the output of the second surface acoustic wave device comprising a filter arrangement to decode the binary coded electromagnetic radiation waveform, and a second transducer which is appropriately actuated by the decoded output, the first transducer being a microphone and the second transducer being a loud speaker.

6. A hybrid unit for a communication system and operable to receive and transmit electromagnetic radiation waveforms modulated by binary coded voice or data message signals from and to a base unit, said hybrid unit having a first surface acoustic wave device with an input to receive a binary coded electromagnetic radiation waveform from the base unit and cause a corresponding binary coded surface acoustic wave to travel from the input to an output thereof and be reflected back to the input, and

a first transducer connected to said output to receive further information from a source thereof and modify said reflected surface acoustic waveform whereby said reflected surface acoustic waveform incorporates such further information and becomes a modified reflected surface acoustic waveform which travels to said input and then travels as a modified binary coded electromagnetic waveform to the base unit.

7. A hybrid unit according to claim 6 wherein the first transducer is a microphone.

8. A hybrid unit according to claim 6 also having a second surface acoustic wave device with an input to receive said binary coded electromagnetic radiation waveform from the base unit and cause a corresponding binary coded surface acoustic wave to travel from the input to an output thereof, the output of the second surface acoustic wave device comprising a filter arrangement to decode the binary coded electromagnetic radiation waveform, and a second transducer which is appropriately actuated by the decoded output.

9. A hybrid unit according to claim 8 wherein the second transducer is a loud speaker.

10. A hybrid unit according to claim 6 wherein the hybrid unit also has a second surface acoustic wave device with an input to receive said binary coded electromagnetic radiation waveform from the base unit and cause a corresponding binary coded surface acoustic wave to travel-from the input to an output thereof, the output of the second surface acoustic wave device comprising a filter arrangement to decode the binary coded electromagnetic radiation waveform, and a second transducer which is appropriately actuated by the decoded output, the first transducer being a microphone and the second transducer being a loud speaker.