1. BPSK Direct Sequence Spread Spectrum

2. BPSK DS-SS signals

3. Spectrum

4. QPSK DS-SS

5. Dual Channel QPSK DS-SS

6. MSK DS-SS

7. MSK DS-SS

8. MSK DS-SS

9. Frequency Hopping Spread Spectrum

10. Spectrum

11. Slow FH-SS

12. Fast FH-SS

13. Hybrid DS FH SS

14. Complex envelope model

15. Complex-envelope of digital modulations

16. Spreading sequence 1. How to choose a spreading sequence?
2. How to generate a spreading sequence?
3. How to choose and generate a set of sequences when more than one sequences are needed, for example, in CDMA systems?

17. Some specification
1. Sequence elements should behave like iid random variables, i.e., the sequence should be pseudo-random.
2. It should be easy to distinguish a spreading signal from a time-shifted version of it.
3. It should be easy to distinguish a spreading signal from other spreading signals, including time-shifted versions of them, in the set.
4. It should be easy for the transmitter and the intended receiver to generate the spreading sequence.
5. It should be difficult for any unintended receiver to acquire and regenerate the spreading sequence.

20. Cross correlation with modulation

21. Binary Linear Feedback Shift Register

22. Binary shift register sequence

25. maximal-length sequence (m-sequence)

26. m-sequence

27. m-sequence

28. Maximal connected sets

29. Gold sequence

30. Choice of sequence

31. Initial code acquisition

32. Radiometer

33. Serial Search

34. Parallel Search

35. Multidwell Search