System and method of using variable pulses for symbology

• US 20050094784A1
• Filed: 10/18/2004
• Published: 05/05/2005
• Est. Priority Date: 10/28/1999
• Status: Active Grant

• Current Assignee: Lightwaves Systems, Inc.
• Original Assignee: Lightwaves Systems, Inc.
• Inventors: Melick, Bruce D., Baych, Leslie D., Snyder, David M.
• Granted Patent: US 7,881,619 B2
• Time in Patent Office: Days
• US Class Current: 379/90.01
• CPC Class Codes: H03K 7/08 Duration or width modulation ; Duty cycle modulation
• CPC Class Codes: H04B 1/69 Spread spectrum techniques
• CPC Class Codes: H04B 1/7163 using impulse radio
• CPC Class Codes: H04B 1/7172 Pulse shape in general H04L25/03834
• CPC Class Codes: H04B 1/7176 Data mapping, e.g. modulation
• CPC Class Codes: H04B 14/026 using pulse time characteristics modulation, e.g. width, position, interval
• CPC Class Codes: H04B 2203/5416 by adding signals to the wave form of the power source
• CPC Class Codes: H04B 3/52 Systems for transmission between fixed stations via waveguides
• CPC Class Codes: H04L 25/0384 Design of pulse shapes pulse shape for impulse radio H04B1/7172
• CPC Class Codes: H04L 25/4902 Pulse width modulation; Pulse position modulation
• CPC Class Codes: H04L 27/0004 using wavelets
• CPC Class Codes: H04L 5/1469 using time-sharing

Abstract

A method and system for storing and transmitting data using variable pulse characteristics to represent ASCII or UNICODE characters, of the value of a string of data using a number base higher than 2. Pulse characteristics are modified to correspond to different data values. Pulse characteristics can include pulse durations, pulse spacings, pulse amplitudes, pulse phases, pulse polarities, pulse shapes and/or other pulse characteristics.

Claims

1. A method of transmitting data, the method comprising:

receiving a digital bit of data from a memory unit;

transforming the bit of data into a transmission pulse, the transmission pulse having a pulse characteristic selected from a set of three or more predetermined pulse characteristics, one of which is corresponding to the bit of data; and

transmitting the transmission pulse over a guided medium.

2. The method of claim 1 wherein the pulse characteristic is a pulse duration.

3. The method of claim 1 wherein the pulse characteristic is a pulse spacing.

4. The method of claim 1 wherein the pulse characteristic is a pulse amplitude.

5. The method of claim 1 wherein the pulse characteristic is a pulse phase.

6. The method of claim 1 wherein the pulse characteristic is a pulse polarity.

7. The method of claim 1 wherein the pulse characteristic is a pulse shape.

8. The method of claim 1 wherein the pulse characteristics correspond to numbers 0 through 9.

9. The method of claim 1 wherein the data is in the form of universal character encoding.

10. The method of claim 1 further comprising:

receiving the transmission pulse from the guided medium; and

transforming the transmission pulse into a digital bit of data corresponding to the characteristics of the transmission pulse.