System and method of using variable pulses for symbology

• US 7,561,808 B2
• Filed: 03/20/2001
• Issued: 07/14/2009
• Est. Priority Date: 03/21/2000
• Status: Expired due to Fees

• Current Assignee: Lightwaves Systems, Inc.
• Original Assignee: Lightwaves Systems, Inc.
• Inventors: Melick, Bruce D., Baych, Leslie D., Snyder, David M.
• Primary Examiner(s): SEDIGHIAN, REZA
• Application Number:
  US09/812,545
• Publication Number:
  US 20020076193A1
• Time in Patent Office: 3,038 Days
• Field of Search: 375/237, 375/238, 375/239, 375/223, 375/242, 375/260, 375/353, 375/256, 398/140, 398/141, 398/189, 398/190, 398/200
• US Class Current: 398/189
• CPC Class Codes: H04B 1/7176 Data mapping, e.g. modulation
• CPC Class Codes: H04B 10/508 Pulse generation, e.g. generation of solitons
• CPC Class Codes: H04B 10/524 Pulse modulation
• CPC Class Codes: H04B 14/026 using pulse time characteristics modulation, e.g. width, position, interval

Abstract

A method and system for storing and transmitting data using variable pulse symbology over a fiber optic or ultra wide band system. Data is stored in memory, accessed and transformed into an electronic or photonic pulse and/or space which has a variable duration, the duration corresponding to the bit of data to be transmitted. The duration of the pulse and/or space is selected from a list of predetermined durations, each corresponding to a different base 10 number. The pulses and spaces may both be used to represent data, or the spaces may be used for meta data. Variable duration pulses may also be used to store data on an optical storage medium or fiber optic cable.

Claims

1. A method of transmitting data using pulse modulation, the method comprising:

receiving bits of data from a memory unit;

transforming a plurality of the bits of data into an ultra wideband pulse, the ultra wideband pulse having a pulse duration selected from a set of ten predetermined pulse durations, one of which is corresponding to the plurality of bits of data; and

transmitting the ultra wideband pulse over a guided medium to a receiver without using a carrier signal to transmit the ultra wideband pulse;

wherein each of the pulse durations within the set of ten predetermined pulse durations corresponds to one of integers 0 through 9.

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

3. The method of claim 1 further comprising:

receiving the ultra wideband pulse from the guided medium at the receiver; and

transforming the ultra wideband pulse into the plurality of bits of data corresponding to the durations of the ultra wideband pulse.

4. A method of transmitting data, comprising:

representing a symbol encoding a plurality of bits of data using a pulse characteristic of a single time modulated ultra wideband radio-frequency pulse;

transmitting the single time modulated ultra wideband radio-frequency pulse over a guided medium from a transmitter to a receiver;

wherein the step of representing comprises encoding the plurality of bits into a base 10 representation, such that the single time modulated ultra wideband pulse corresponds to a digit between 0 and 9.

5. The method of claim 4 wherein guided medium is an electrically conductive guided medium.

6. The method of claim 4 wherein the pulse characteristic is a pulse duration.

7. A method of transmitting data, comprising:

representing a character with a numeric base-10 character code;

transforming each digit of the numeric base-10 character code into an ultra wideband pulse, the ultra wideband pulse having a pulse duration selected from a set of ten predetermined pulse durations, one of which is corresponding to the digit; and

transmitting the ultra wideband pulse over a guided medium to a receiver without using a carrier signal to transmit the ultra wideband pulse; and

wherein each of the pulse durations within the set of ten predetermined pulse durations corresponds to one of integers 0 through 9.