Pulse ratio modulation
An embodiment in accordance with the present invention provides a system and method of physically modulating a digital signal across a medium. A signal is sent one bit at a time (serially) as a period of high voltage followed by a period of low voltage. The present invention includes several major advantages. One advantage is that the code to execute the method is very lightweight. Another advantage is that the signals require no synchronization source. The signals of the present invention function as their own synchronization.
1. A system for signal transduction comprising:
a transmission device, wherein the transmission device is configured to transmit a signal;
a reception device, wherein the reception device is configured to receive the signal transmitted by the transmission device;
a non-transitory computer readable medium programmed for:
determining a length of the signal transmitted by the transmission device;
determining whether the signal transmitted is a high signal or a low signal; and
determining whether a ratio of the time of the high signal to the time of the low signal is greater than 1.5; and
determining the continuation of communication based on whether a duration of a last low signal is more than two times a duration of a previous low signal.
2. The system for signal transduction of claim 1 further comprising the signal being one chosen from a group consisting of voltage or capacitance.
3. The system for signal transduction of claim 2 wherein a voltage used for the signal is between two discernable voltage levels.
4. The system for signal transduction of claim 1 further comprising when the ratio of the time of the high signal to the time of the low signal is greater than 1.5 a bit being transmitted is read as a 1.
5. The system for signal transduction of claim 1 further comprising when the ratio of the time of the high signal to the time of the low signal is less than 1.5 a bit being transmitted is zero.
6. The system for signal transduction of claim 1 further comprising when the time of the low signal is greater than two times the time of the last low signal an end of the communication is triggered.
7. The system for signal transduction of claim 6 further comprising a previous time at low voltage being used as a point of comparison when the end of the communication is triggered.
8. The system for signal transduction of claim 1 further comprising a first bit being captured when an incoming signal voltage goes high, and once the first bit is captured a second bit is being transmitted.
9. The system for signal transduction of claim 8 further comprising a low voltage period being measured and a margin of error (E) is calculated as a portion of the low voltage period.
10. The system for signal transduction of claim 1 further comprising the signal being sent one bit at a time (serially) as a period of high voltage followed by a period of low voltage.
11. A method for signal transduction comprising:
determining a length of a signal transmitted by a transmission device;
determining whether the signal transmitted is a high signal or a low signal;
determining whether a ratio of the time of the high signal to the time of the low signal is greater than 1.5; and
determining continuation of communication based on whether a duration of a last low signal is more than two times a duration of a previous low signal.
12. The method of claim 11 further comprising executing the method with a non-transitory computer readable medium.
13. The method of claim 11 further comprising the signal being one chosen from a group consisting of voltage or capacitance.
14. The method of claim 13 further comprising using a voltage for the signal between two discernable voltage levels.
15. The method of claim 11 further comprising transmitting a bit read as 1, when the ratio of the time of the high signal to the time of the low signal is greater than 1.5.
16. The method of claim 11 further comprising transmitting a bit read as zero when the ratio of the time of the high signal to the time of the low signal is less than or equal to 1.5.
17. The method of claim 11 further comprising triggering an end to the communication when the time of the low signal is greater than two times the time of the last low signal.
18. The method of claim 17 further comprising a previous time at low voltage being used as a point of comparison when the end of the communication is triggered.
19. The method of claim 11 further comprising capturing a first bit when an incoming signal voltage goes high, and once the first bit is captured a second bit is being transmitted.
20. The method of claim 11 further comprising sending the signal one bit at a time (serially) as a period of high voltage followed by a period of low voltage.