Method and system of preconditioning transmitted signals
A communication system transmits data signals between communication nodes. A first data signal is transmitted as an electromagnetic wave along a first data transmission path to a receiver using skywave propagation. A second data signal, identical to the first data signal, is transmitted to the receiver along a second data transmission path. The two data signals are compared at the receiver to determine any distortion caused by the skywave propagation. Data regarding the distortion is sent back to the transmitter so that subsequent transmitted data signals may be preconditioned when sent by skywave propagation.
1. A system, comprising:
a first communication node configured to transmit a first data signal as an electromagnetic wave along a first data transmission path using skywave propagation and to transmit a second data signal along a second data transmission path;
wherein the first data signal is identical to second data signal;
a second communication node configured to receive the first data signal and the second data signal transmitted from the first communication node, and wherein the second communication node includes a processor configured to decode and compare the first data signal to the second data signal received at the second communication node;
wherein differences between the first data signal and the second data signal received at the second communication node indicate distortions caused by skywave propagation; and,
wherein the distortions in the first data signal are communicated to the first communication node so that a third data signal transmitted by the first communication node is preconditioned to correspond with the distortions caused by skywave propagation.
2. The system of claim 1 , wherein the second data transmission path is a wired transmission line from the first communication node the second communication node.
3. The system of claim 1 , wherein the second data transmission path includes a fiber optic cable.
4. The system of claim 1 , wherein the first and second data signals are decoded using at least two different decoding methods, and wherein the decoded signal resulting from the decoding method that takes a shortest time is processed.
5. The system of claim 4 , wherein the at least two decoding methods are performed in parallel.
6. The system of claim 4 , wherein the at least two decoding methods are performed sequentially.
7. The system of claim 1 , wherein the distortions in the first data signal are communicated to the first communication node by the second data transmission path.
8. A method comprising:
sending a first data signal from a transmitter to a receiver by a first data transmission path using skywave propagation;
sending a second data signal from the transmitter to the receiver by a second data transmission path; wherein the second data signal is identical to the first data signal;
decoding the received first data signal and the received second data signal at the receiver;
comparing the received first data signal to the received second data signal, wherein differences between the received first data signal and the received second data signal indicate distortions caused during the skywave propagation of the first data signal;
transmitting data regarding the distortions in the received first data signal from the receiver to the transmitter; and,
preconditioning a third data signal; wherein the preconditioning of the third data signal corresponds to the distortions in the received first data signal.
9. The method of claim 8 , further comprising:
sending the preconditioned third data signal from the transmitter to the receiver by skywave propagation.
10. The method of claim 8 , wherein the received first data signal is decoded using at least two different decoding methods, and wherein the decoded signal resulting from the decoding method that takes a shortest time is processed.
11. The method of claim 10 , wherein the at least two decoding methods are performed in parallel.
12. The method of claim 10 , wherein the at least two decoding methods are performed sequentially.
13. The method of claim 8 , wherein the second data transmission path is a wired transmission line from first communication node to a second communication node.
14. The method of claim 8 , wherein the second data transmission path includes a fiber optic cable.
15. The method of claim 8 , wherein the data regarding the distortions in the first data signal are transmitted from the receiver to the transmitter by the second data transmission path.
16. The method of claim 8 , wherein the data regarding the distortions in the first data signal are transmitted from the receiver to the transmitter by both the first data transmission path and the second data transmission path.
17. A method comprising:
transmitting a preconditioned data signal from a first communication node using skywave propagation;
receiving the preconditioned data signal at a second communication node;
performing a first decoding method on the data signal;
performing a second decoding method on the data signal at the same time as the first decoding method;
processing the data signal resulting from one of the first decoding method and the second decoding method that is quickest to decode the data signal.
18. The method of claim 17 , wherein the second decoding method is more computationally expensive than the first decoding method.
19. The method of claim 17 , further comprising:
performing a third decoding method on the data signal at the same time as the first and second decoding methods.
20. The method of claim 19 , wherein the third decoding method is more computationally expensive than both the first decoding method and the second decoding method.