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 spreading N replicas of a received signal with N orthogonal sequences. A scrambled set of N channel signals may be generated based on the spread N replicas of the received signal. M replicas of a received signal may be spread with the N orthogonal sequences. A scrambled set of M channel signals may be generated based on the spread M replicas of the received signal. The generated scrambled set of N channel signals and said generated scrambled set of M channel signals may be multiplexed onto K multiplexed channel signals on a receiver chain, where M, N and K are integers. The spread N replicas of the received signal may be combined. The combined spread N replicas of the received signal may be scrambled.
1. A method for processing signals, the method comprising:
spreading N replicas of said received signal with N orthogonal sequences;
generating a scrambled set of N channel signals based on said spread N replicas of said received signal;
spreading M replicas of a received signal with said N orthogonal sequences;
generating a scrambled set of M channel signals based on said spread M replicas of said received signal; and
multiplexing said generated scrambled set of N channel signals and said generated scrambled set of M channel signals onto K multiplexed channel signals on a receiver chain, wherein M, N and K are integers.
2. The method according to claim 1 , comprising combining said spread N replicas of said received signal.
3. The method according to claim 2 , comprising scrambling said combined spread N replicas of said received signal.
4. The method according to claim 2 , comprising overlaying a first scrambling sequence on said combined spread N replicas of said received signal.
5. The method according to claim 1 , comprising combining said spread M replicas of said received signal.
6. The method according to claim 5 , comprising scrambling said combined spread M replicas of said received signal.
7. The method according to claim 5 , comprising overlaying a second scrambling sequence on said combined spread N replicas of said received signal.
8. The method according to claim 1 , comprising orthogonally multiplexing said generated scrambled set of N channel signals and said generated scrambled set of M channel signals onto K multiplexed channels on said receiver chain.
9. The method according to claim 1 , comprising downconverting the receiver chain K multiplexed channel signals to corresponding baseband multiplexed channel signals.
10. The method according to claim 9 , comprising generating K separate channel signals from said downconverted baseband multiplexed channel signals.
11. The method according to claim 1 , wherein N is greater than M.
12. The method according to claim 1 , wherein N is equal to M.
13. The method according to claim 1 , comprising receiving said M replicas of said received signal via M physical antenna elements.
14. The method according to claim 1 , comprising generating N signal response values for said M physical antenna elements as a function of said M replicas of said received signals.
15. The method according to claim 14 , comprising calculating M physical weighing parameters as a function of said M replicas of said received signal such that each of said M physical weighing parameters is associated with a corresponding one of said M physical antenna elements.
16. The method according to claim 15 , comprising generating said N signal response values for said M physical antenna elements as a function of said M physical weighing parameters.
17. The method according to claim 14 , comprising calculating N weighing parameters as a function of said N signal response values for said M physical antenna elements.
18. The method according to claim 17 , comprising generating N weighted signal response values by weighing each of a corresponding one of said N signal response values by a corresponding one of said N weighing parameters.
19. The method according to claim 18 , comprising combining said generated N weighted signal response values.
20. A system for processing signals, the system comprising:
at least one processor operative to spread N replicas of said received signal with N orthogonal sequences;
said at least one processor operative to generate a scrambled set of N channel signals based on said spread N replicas of said received signal;
said at least one processor operative to spread M replicas of a received signal with said N orthogonal sequences;
said at least one processor operative to generate a scrambled set of M channel signals based on said spread M replicas of said received signal; and
said at least one processor operative to multiplex said generated scrambled set of N channel signals and said generated scrambled set of M channel signals onto K multiplexed channel signals on a receiver chain, wherein M, N and K are integers.
21. The system according to claim 20 , wherein said at least one processor is operative to combine said spread N replicas of said received signal.
22. The system according to claim 21 , wherein said at least one processor is operative to scramble said combined spread N replicas of said received signal.
23. The system according to claim 21 , wherein said at least one processor is operative to overlay a first scrambling sequence on said combined spread N replicas of said received signal.
24. The system according to claim 20 , wherein said at least one processor is operative to combine said spread M replicas of said received signal.
25. The system according to claim 24 , wherein said at least one processor is operative to scramble said combined spread M replicas of said received signal.
26. The system according to claim 24 , wherein said at least one processor is operative to overlay a second scrambling sequence on said combined spread N replicas of said received signal.
27. The system according to claim 20 , wherein said at least one processor is operative to orthogonally multiplex said generated scrambled set of N channel signals and said generated scrambled set of M channel signals onto K multiplexed channels on said receiver chain.
28. The system according to claim 20 , wherein said at least one processor is operative to downconvert the receiver chain K multiplexed channel signals to corresponding baseband multiplexed channel signals.
29. The system according to claim 28 , wherein said at least one processor is operative to generate K separate channel signals from said downconverted baseband multiplexed channel signals.
30. The system according to claim 20 , wherein N is greater than M.
31. The system according to claim 20 , wherein N is equal to M.
32. The system according to claim 20 , wherein said at least one processor is operative to receive said M replicas of said received signal via M physical antenna elements.
33. The system according to claim 20 , wherein said at least one processor is operative to generate N signal response values for said M physical antenna elements as a function of said M replicas of said received signals.
34. The system according to claim 33 , wherein said at least one processor is operative to calculate M physical weighing parameters as a function of said M replicas of said received signal such that each of said M physical weighing parameters is associated with a corresponding one of said M physical antenna elements.
35. The system according to claim 34 , wherein said at least one processor is operative to generate said N signal response values for said M physical antenna elements as a function of said M physical weighing parameters.
36. The system according to claim 33 , wherein said at least one processor is operative to calculate N weighing parameters as a function of said N signal response values for said M physical antenna elements.
37. The system according to claim 36 , wherein said at least one processor is operative to generate N weighted signal response values by weighing each of a corresponding one of said N signal response values by a corresponding one of said N weighing parameters.
38. The system according to claim 37 , wherein said at least one processor is operative to combine said generated N weighted signal response values.
39. A system for processing signals, the system comprising:
one or more circuits operative to spread N replicas of said received signal with N orthogonal sequences;
said one or more circuits operative to generate a scrambled set of N channel signals based on said spread N replicas of said received signal;
said one or more circuits operative to spread M replicas of a received signal with said N orthogonal sequences;
said one or more circuits operative to generate a scrambled set of M channel signals based on said spread M replicas of said received signal; and
said one or more circuits operative to multiplex said generated scrambled set of N channel signals and said generated scrambled set of M channel signals onto K multiplexed channel signals on a receiver chain, wherein M, N and K are integers.
40. The system according to claim 39 , wherein said one or more circuits is operative to combine said spread N replicas of said received signal.
41. The system according to claim 40 , wherein said one or more circuits is operative to scramble said combined spread N replicas of said received signal.
42. The system according to claim 40 , wherein said one or more circuits is operative to overlay a first scrambling sequence on said combined spread N replicas of said received signal.
43. The system according to claim 39 , wherein said one or more circuits is operative to combine said spread M replicas of said received signal.
44. The system according to claim 43 , wherein said one or more circuits is operative to scramble said combined spread M replicas of said received signal.
45. The system according to claim 43 , wherein said one or more circuits is operative to overlay a second scrambling sequence on said combined spread N replicas of said received signal.
46. The system according to claim 43 , wherein said one or more circuits is operative to orthogonally multiplex said generated scrambled set of N channel signals and said generated scrambled set of M channel signals onto K multiplexed channels on said receiver chain.
47. The system according to claim 39 , wherein said one or more circuits is operative to downconvert the receiver chain K multiplexed channel signals to corresponding baseband multiplexed channel signals.
48. The system according to claim 47 , wherein said one or more circuits is operative to generate K separate channel signals from said downconverted baseband multiplexed channel signals.
49. The system according to claim 39 , wherein N is greater than M.
50. The system according to claim 39 , wherein N is equal to M.
51. The system according to claim 39 , wherein said one or more circuits is operative to receive said M replicas of said received signal via M physical antenna elements.
52. The system according to claim 39 , wherein said one or more circuits is operative to generate N signal response values for said M physical antenna elements as a function of said M replicas of said received signals.
53. The system according to claim 52 , wherein said one or more circuits is operative to calculate M physical weighing parameters as a function of said M replicas of said received signal such that each of said M physical weighing parameters is associated with a corresponding one of said M physical antenna elements.
54. The system according to claim 53 , wherein said one or more circuits is operative to generate said N signal response values for said M physical antenna elements as a function of said M physical weighing parameters.
55. The system according to claim 52 , wherein said one or more circuits is operative to calculate N weighing parameters as a function of said N signal response values for said M physical antenna elements.
56. The system according to claim 55 , wherein said one or more circuits is operative to generate N weighted signal response values by weighing each of a corresponding one of said N signal response values by a corresponding one of said N weighing parameters.
57. The system according to claim 56 , wherein said one or more circuits is operative to combine said generated N weighted signal response values.