Identification, alignment and cross polarization optimization for orthogonal polarized transmission and relay systems

1. A method of distinguishing polarizations and information about the carrier signals transmitted from a repeating relay, the method comprising:

encoding, using an encoder, a first data stream and a second data stream at a repeating relay;

modulating, using a modulator, the first and second encoded data streams at the repeating relay;

spreading, using a spreader, the first modulated data stream such that a first spread waveform results having first spreading characteristics and the second modulated data stream such that a second spread waveform results having second spreading characteristics, wherein the first spreading characteristics and the second spreading characteristics are different and differentiate the first spread waveform from the second spread waveform; and

transmitting from the repeating relay, the first spread waveform as a first spread spectrum carrier signal on a first electromagnetic (EM) polarization and the second spread waveform as a second spread spectrum carrier signal on a second EM polarization different from the first EM polarization.

2. The method of claim 1 , wherein modulation format, Forward Error Coding (FEC) rate, center frequency, and symbol rate is the same for the first and second carrier signals.

3. The method of claim 1 , further comprising:

receiving, at a receiver, the first spread spectrum carrier signal and the second spread spectrum carrier signal; and

distinguishing between the first EM polarization and the second EM polarization based on different spreading characteristics exhibited on the respective first and second spread spectrum carrier signals.

4. The method of claim 3 , further comprising identifying a spread spectrum sequence for the first and second carrier signals based on a unique spread sequence that is applied to each carrier signal.

5. The method of claim 1 , wherein spreading the first and second modulated data streams further comprises at least one of:

applying the same spread sequence to each of the first and second modulated data streams and further phase advancing the first spread waveform from the second spread waveform on an orthogonal polarization; and

applying the same spread sequence to each of the first and second modulated data streams and further phase retarding the first spread waveform from the second spread waveform on an orthogonal polarization.

6. The method of claim 1 , wherein the first and second carrier signals have at least one of different center frequencies, symbol rates, modulation formats, FEC types, and FEC rates.

7. The method of claim 1 , wherein at least one of the first and second carrier signals is allocated a spectrum having no other carrier present within the spectrum.

8. The method of claim 1 , wherein at least one of the first and second carrier signals exists with an additional carrier present within at least a portion of a bandwidth to which the at least one of the first and second carrier signals is allocated.

9. The method of claim 8 , wherein the additional carrier is present within the entire bandwidth to which at least one of the first and second carrier signals is allocated.

10. The method of claim 1 , further comprising transmitting from the repeating relay within at least one of the first carrier signal and the second carrier signal, information from a remote transmission device.

11. A method of distinguishing polarizations of carrier signals transmitted from a repeating relay, the method comprising:

receiving, at a receiver, a first spread spectrum carrier signal transmitted from a repeating relay on a first electromagnetic (EM) polarization and a second spread spectrum carrier signal transmitted from the repeating relay on a second EM polarization, different from the first EM polarization; and

distinguishing between the first EM polarization and the second EM polarization based on different spreading characteristics exhibited on the respective first and second spread spectrum carrier signals.

12. The method of claim 11 , further comprising:

despreading, using a despreader, a spread waveform;

demodulating, using a demodulator, the despread waveform; and

decoding, using a decoder, the demodulated waveform such that a data stream results.

13. The method of claim 11 , wherein the modulation format, Forward Error Coding (FEC) rate, center frequency, and symbol rate is the same for each of the first and second carrier signals.

14. The method of claim 13 wherein the unique spread sequences are a piori and are pre-programmed into a detection device for providing detection status of a detected signal or are loaded into a detection device on demand.

15. The method of claim 11 , further comprising identifying a spread spectrum sequence for the first and second carrier signals corresponding to at least one of a unique spread sequence that is applied to each carrier signal and a spread spectrum sequence that is the same such that the first spread waveform is phase advanced from the second spread waveform on an orthogonal polarization.

16. The method of claim 11 , further comprising identifying a spread spectrum sequence for the first and second carrier signals wherein the spread spectrum sequence is the same and the first spread waveform is phase retarded from the second spread waveform on an orthogonal polarization.

17. The method of claim 11 , wherein the first and second carrier signals have at least one of different center frequencies, symbol rates, modulation formats, FEC types, and FEC rates.

18. The method of claim 11 , wherein at least one of the first and second carrier signals exists with an additional carrier present within at least a portion of a bandwidth to which the at least one of the first and second carrier signals is allocated.

19. The method of claim 18 , wherein the additional carrier is present within the entire bandwidth to which the at least one of the first and second carrier signals is allocated.

20. The method of claim 11 , further comprising indicating, by the receiver, identification of at least one of a desired repeating relay and an undesired repeating relay.

21. A system for distinguishing polarizations and information about the carrier signals transmitted from a repeating relay, the system comprising:

an encoder that encodes a first data stream and a second data stream at a repeating relay;

a modulator that modulates the first and second encoded data streams at the repeating relay;

a spreader that spreads the first modulated data stream such that a first spread waveform results having first spreading characteristics and the second modulated data stream such that a second spread waveform results having second spreading characteristics, wherein the first spreading characteristics and the second spreading characteristics are different and differentiate the first spread waveform from the second spread waveform; and

a transmitting device that transmits from the repeating relay, the first spread waveform as a first spread spectrum carrier signal on a first electromagnetic (EM) polarization and the second spread waveform as a second spread spectrum carrier signal on a second EM polarization different from the first EM polarization.