Communications system with selective baseband pilot injected carrier (BPIC) and input data modulation and related methods

1. A communications system comprising:

a transmitting device for transmitting a modulated signal therefrom based upon first input data and second input data comprising a bit stream, the transmitting device comprising:

a baseband injected pilot carrier (BPIC) generator for selectively generating BPIC data corresponding to the first input data,

an interleaver for interleaving the BPIC data within the second input data bit stream, and

a modulator for modulating the interleaved BPIC data based upon a first modulation type and modulating the interleaved second input data based upon a second modulation type to provide a modulated signal; and

a receiving device for receiving the modulated signal from said transmitting device and comprising:

a BPIC detector, and

a demodulator cooperating with said BPIC detector for demodulating the modulated signal from said transmitting device based upon the interleaved BPIC data to generate the first and second input data.

2. The communications system of claim 1 wherein the first modulation type has a lower order than the second modulation type.

3. The communications system of claim 1 wherein said demodulator comprises a phase-locked loop (PLL).

4. The communications system of claim 1 wherein said transmitting device further comprises a forward error correction (FEC) code generator upstream from said modulator for encoding the first and second input data.

5. The communications system of claim 4 wherein said FEC code generator comprises a turbo code generator.

6. The communications system of claim 1 wherein the first modulation type comprises Quadrature Phase Shift Keying (QPSK).

7. The communications system of claim 1 wherein the second modulation type comprises Binary Phase Shift Keying (BPSK).

8. The communications system of claim 1 wherein said interleaver interleaves the BPIC data with a uniform data portion therebetween.

9. A transmitting device for transmitting a modulated signal therefrom based upon first input data and second input data comprising a bit stream, the transmitting device comprising:

a baseband injected pilot carrier (BPIC) generator for selectively generating BPIC data corresponding to the first input data;

an interleaver for interleaving the BPIC data within the second input data bit stream; and

a modulator for modulating the interleaved BPIC data based upon a first modulation type and modulating the interleaved second input data based upon a second modulation type to provide a modulated signal.

10. The transmitting device of claim 9 wherein the first modulation type has a lower order than the second modulation type.

11. The transmitting device of claim 9 further comprising a forward error correction (FEC) code generator upstream from said modulator for encoding the first and second input data.

12. The transmitting device of claim 9 wherein the first modulation type comprises Quadrature Phase Shift Keying (QPSK), and wherein the second modulation type comprises Binary Phase Shift Keying (BPSK).

13. A receiving device comprising:

a demodulator for receiving a modulated signal, the modulated signal being generated by interleaving baseband injected pilot carrier (BPIC) BPIC data corresponding to first input data within a second input data comprising a bit stream and modulating the interleaved BPIC data based upon a first modulation type and modulating the interleaved second input data based upon a second modulation type; and

a BPIC detector cooperating with said demodulator for demodulating the modulated signal based upon the interleaved BPIC data to generate the first and second input data.

14. The receiving device of claim 13 wherein the first modulation type has a lower order than the second modulation type.

15. The receiving device of claim 13 wherein said demodulator comprises a phase-locked loop (PLL).

16. The receiving device of claim 13 wherein the first modulation type comprises Quadrature Phase Shift Keying (QPSK), and wherein the second modulation type comprises Binary Phase Shift Keying (BPSK).

17. A communications method comprising:

selectively generating baseband injected pilot carrier (BPIC) data corresponding to first input data;

interleaving the BPIC data within a second input data comprising a bit stream;

modulating the interleaved BPIC data based upon a first modulation type and modulating the interleaved second input data based upon a second modulation type to provide a modulated signal, and transmitting the modulated signal; and

receiving the modulated signal and demodulating the modulated signal based upon the interleaved BPIC data to generate the first and second input data.

18. The method of claim 17 wherein the first modulation type has a lower order than the second modulation type.

19. The method of claim 17 further comprising encoding the first and second input data using a forward error correction (FEC) code.

20. The method of claim 17 wherein the first modulation type comprises Quadrature Phase Shift Keying (QPSK).

21. The method of claim 17 wherein the second modulation type comprises Binary Phase Shift Keying (BPSK).

22. The method of claim 17 wherein interleaving comprises interleaving the BPIC data with a uniform data portion therebetween.