Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements
View Patent ↗A system and method for processing signals are disclosed. The method may include scrambling a first composite signal comprising N orthogonal sequences to generate a set of N channel signals. A second composite signal including M orthogonal sequences may be scrambled to generate a set of M channel signals. The M orthogonal sequences may be a subset of the N orthogonal sequences. The generated set of N channel signals and the generated set of M channel signals may be combined to generate K channel signals. K multiplexed channels may include the N channel signals and the M channel signals. The N channel signals may correspond to N antenna elements, and the M channel signals may correspond to M antenna elements. Each of the N channel signals may be spread utilizing a corresponding one of the N orthogonal sequences.
1. A method for processing signals, the method comprising:
scrambling a first composite signal comprising N orthogonal sequences to generate a set of N channel signals;
scrambling a second composite signal comprising M orthogonal sequences to generate a set of M channel signals, wherein said M orthogonal sequences are a subset of said N orthogonal sequences; and
combining said generated set of N channel signals and said generated set of M channel signals to generate K channel signals.
2. The method according to claim 1 , wherein K multiplexed channels comprise said N channel signals and said M channel signals.
3. The method according to claim 2 , wherein:
said N channel signals correspond to N antenna elements; and
said M channel signals correspond to M antenna elements.
4. The method according to claim 1 , comprising spreading each of said N channel signals utilizing a corresponding one of said N orthogonal sequences.
5. The method according to claim 4 , comprising overlaying a first scrambling sequence onto said spread N channel signals to form said generated set of N channel signals.
6. The method according to claim 5 , comprising spreading each of said M channel signals utilizing a corresponding one of said M orthogonal sequences.
7. The method according to claim 6 , comprising overlaying a second scrambling sequence onto said spread M channel signals to form said generated set of M channel signals.
8. The method according to claim 7 , comprising combining said overlaid spread N channel signals with said overlaid spread M channel signals to generate said K channel signals.
9. The method according to claim 1 , comprising multiplexing said generated K channel signals on to a receiver chain.
10. The method according to claim 9 , comprising downconverting said multiplexed generated K channel signals, via said receiver chain, to corresponding baseband multiplexed channel signals.
11. The method according to claim 10 , comprising ggenerating K separate signals from said downconverted baseband multiplexed channel signals.
12. The method according to claim 1 , comprising orthogonally multiplexing said generated K channel signals on to a receiver chain.
13. The method according to claim 1 , comprising cancelling interference, which is due to said generated set of N channel signals, from said generated set of M channel signals.
14. The method according to claim 1 , comprising cancelling interference, which is due to said generated set of M channel signals, from said generated set of N channel signals.
15. A system for processing signals, the system comprising:
at least one processor operable to scramble a first composite signal comprising N orthogonal sequences to generate a set of N channel signals;
said at least one processor operable to scramble a second composite signal comprising M orthogonal sequences to generate a set of M channel signals, wherein said M orthogonal sequences are a subset of said N orthogonal sequences; and
said at least one processor operable to combine said generated set of N channel signals and said generated set of M channel signals to generate K channel signals.
16. The system according to claim 15 , wherein K multiplexed channels comprise said N channel signals and said M channel signals.
17. The system according to claim 16 , wherein:
said N channel signals correspond to N antenna elements; and
said M channel signals correspond to M antenna elements.
18. The system according to claim 15 , wherein said at least one processor is operable to spread each of said N channel signals utilizing a corresponding one of said N orthogonal sequences.
19. The system according to claim 18 , wherein said at least one processor is operable to overlay a first scrambling sequence onto said spread N channel signals to form said generated set of N channel signals.
20. The system according to claim 19 , wherein said at least one processor is operable to spread each of said M channel signals utilizing a corresponding one of said M orthogonal sequences.
21. The system according to claim 20 , wherein said at least one processor is operable to overlay a second scrambling sequence onto said spread M channel signals to form said generated set of M channel signals.
22. The system according to claim 1 , wherein said at least one processor is operable to combine said overlaid spread N channel signals with said overlaid spread M channel signals to generate said K channel signals.
23. The system according to claim 15 , wherein said at least one processor is operable to multiplex said generated K channel signals on to a receiver chain.
24. The system according to claim 23 , wherein said at least one processor is operable to downconvert said multiplexed generated K channel signals, via said receiver chain, to corresponding baseband multiplexed channel signals.
25. The system according to claim 24 , wherein said at least one processor is operable to generate K separate signals from said downconverted baseband multiplexed channel signals.
26. The system according to claim 15 , wherein said at least one processor is operable to orthogonally multiplex said generated K channel signals on to a receiver chain.
27. The system according to claim 15 , wherein said at least one processor is operable to cancel interference, which is due to said generated set of N channel signals, from said generated set of M channel signals.
28. The system according to claim 15 , wherein said at least one processor is operable to cancel interference, which is due to said generated set of M channel signals, from said generated set of N channel signals.
29. A system for processing signals, the system comprising:
one or more circuits operable to scramble a first composite signal comprising N orthogonal sequences to generate a set of N channel signals;
said one or more circuits operable to scramble a second composite signal comprising M orthogonal sequences to generate a set of M channel signals, wherein said M orthogonal sequences are a subset of said N orthogonal sequences; and
said one or more circuits operable to combine said generated set of N channel signals and said generated set of M channel signals to generate K channel signals.
30. The system according to claim 29 , wherein K multiplexed channels comprise said N channel signals and said M channel signals.
31. The system according to claim 30 , wherein:
said N channel signals correspond to N antenna elements; and
said M channel signals correspond to M antenna elements.
32. The system according to claim 29 , wherein said one or more circuits is operable to spread each of said N channel signals utilizing a corresponding one of said N orthogonal sequences.
33. The system according to claim 32 , wherein said one or more circuits is operable to overlay a first scrambling sequence onto said spread N channel signals to form said generated set of N channel signals.
34. The system according to claim 33 , wherein said one or more circuits is operable to spread each of said M channel signals utilizing a corresponding one of said M orthogonal sequences.
35. The system according to claim 34 , wherein said one or more circuits is operable to overlay a second scrambling sequence onto said spread M channel signals to form said generated set of M channel signals.
36. The system according to claim 35 , wherein said one or more circuits is operable to combine said overlaid spread N channel signals with said overlaid spread M channel signals to generate said K channel signals.
37. The system according to claim 29 , wherein said one or more circuits is operable to multiplex said generated K channel signals on to a receiver chain.
38. The system according to claim 37 , wherein said one or more circuits is operable to downconvert said multiplexed generated K channel signals, via said receiver chain, to corresponding baseband multiplexed channel signals.
39. The system according to claim 38 , wherein said one or more circuits is operable to generate K separate signals from said downconverted baseband multiplexed channel signals.
40. The system according to claim 29 , wherein said one or more circuits is operable to orthogonally multiplex said generated K channel signals on to a receiver chain.
41. The system according to claim 29 , wherein said one or more circuits is operable to cancel interference, which is due to said generated set of N channel signals, from said generated set of M channel signals.
42. The system according to claim 29 , wherein said one or more circuits is operable to cancel interference, which is due to said generated set of M channel signals, from said generated set of N channel signals.