Iterative multi-stage detection technique for a diversity receiver having multiple antenna elements

Abstract

A method for processing signals includes scrambling at a receiver, a plurality of composite signals to generate a first plurality of channel signals. The plurality of composite signals may include a corresponding plurality of orthogonal sequences. The method may further include combining at the receiver, the generated first plurality of channel signals to generate a second plurality of channel signals. The scrambling of the plurality of composite signals may be based on a corresponding plurality of scrambling sequences. The first plurality of channel signals may correspond to a plurality of receive antennas. Each of the first plurality of channel signals may be spread utilizing a corresponding one of the plurality of orthogonal sequences. At least one scrambling sequence may be overlayed onto the spread first plurality of channel signals to form the generated set of first plurality of channel signals.

1 - 29 . (canceled) 
     
     
         30 . A method for processing signals, the method comprising:
 scrambling at a receiver, a plurality of composite signals to generate a first plurality of channel signals, wherein said plurality of composite signals comprises a corresponding plurality of orthogonal sequences; and   combining at said receiver, said generated first plurality of channel signals to generate a second plurality of channel signals.   
     
     
         31 . The method according to  claim 30 , wherein said scrambling of said plurality of composite signals is based on a corresponding plurality of scrambling sequences. 
     
     
         32 . The method according to  claim 30 , wherein said first plurality of channel signals corresponds to a plurality of receive antennas. 
     
     
         33 . The method according to  claim 30 , comprising spreading each of said first plurality of channel signals utilizing a corresponding one of said plurality of orthogonal sequences. 
     
     
         34 . The method according to  claim 33 , comprising overlaying at least one scrambling sequence onto said spread first plurality of channel signals to form said generated set of first plurality of channel signals. 
     
     
         35 . The method according to  claim 30 , comprising multiplexing said generated second plurality of channel signals on to a receiver chain. 
     
     
         36 . The method according to  claim 35 , comprising downconverting said multiplexed generated second plurality of channel signals, via said receiver chain, to corresponding baseband multiplexed channel signals. 
     
     
         37 . The method according to  claim 36 , comprising generating separate signals from said downconverted baseband multiplexed channel signals. 
     
     
         38 . The method according to  claim 30 , comprising orthogonally multiplexing said generated second plurality of channel signals on to a receiver chain. 
     
     
         39 . The method according to  claim 30 , comprising cancelling interference, which is due to said generated first plurality of channel signals. 
     
     
         40 . A system for processing signals, the system comprising:
 at least one processor within a receiver, said at least one processor operable to scramble at said receiver, a plurality of composite signals to generate a first plurality of channel signals, wherein said plurality of composite signals comprises a corresponding plurality of orthogonal sequences; and   said at least one processor operable to combine at said receiver, said generated first plurality of channel signals to generate a second plurality of channel signals.   
     
     
         41 . The system according to  claim 40 , wherein said scrambling of said plurality of composite signals is based on a corresponding plurality of scrambling sequences. 
     
     
         42 . The system according to  claim 40 , wherein said first plurality of channel signals corresponds to a plurality of receive antennas. 
     
     
         43 . The system according to  claim 40 , wherein said at least one processor is operable to spread each of said first plurality of channel signals utilizing a corresponding one of said plurality of orthogonal sequences. 
     
     
         44 . The system according to  claim 43 , wherein said at least one processor is operable to overlay at least one scrambling sequence onto said spread first plurality of channel signals to form said generated set of first plurality of channel signals. 
     
     
         45 . The system according to  claim 40 , wherein said at least one processor is operable to multiplex said generated second plurality of channel signals on to a receiver chain. 
     
     
         46 . The system according to  claim 45 , wherein said at least one processor is operable to downconvert said multiplexed generated second plurality of channel signals, via said receiver chain, to corresponding baseband multiplexed channel signals. 
     
     
         47 . The system according to  claim 46 , wherein said at least one processor is operable to generate separate signals from said downconverted baseband multiplexed channel signals. 
     
     
         48 . The system according to  claim 40 , wherein said at least one processor is operable to orthogonally multiplex said generated second plurality of channel signals on to a receiver chain. 
     
     
         49 . The system according to  claim 40 , wherein said at least one processor is operable to cancel interference, which is due to said generated first plurality of channel signals. 
     
     
         50 . A system for processing signals, the system comprising:
 one or more circuits within a receiver, said one or more circuits operable to scramble at said receiver, a plurality of composite signals to generate a first plurality of channel signals, wherein said plurality of composite signals comprises a corresponding plurality of orthogonal sequences; and   said one or more circuits operable to combine at said receiver, said generated first plurality of channel signals to generate a second plurality of channel signals.   
     
     
         51 . The system according to  claim 50 , wherein said scrambling of said plurality of composite signals is based on a corresponding plurality of scrambling sequences. 
     
     
         52 . The system according to  claim 50 , wherein said first plurality of channel signals corresponds to a plurality of receive antennas. 
     
     
         53 . The system according to  claim 50 , wherein said one or more circuits is operable to spread each of said first plurality of channel signals utilizing a corresponding one of said plurality of orthogonal sequences. 
     
     
         54 . The system according to  claim 53 , wherein said one or more circuits is operable to overlay at least one scrambling sequence onto said spread first plurality of channel signals to form said generated set of first plurality of channel signals. 
     
     
         55 . The system according to  claim 50 , wherein said one or more circuits is operable to multiplex said generated second plurality of channel signals on to a receiver chain. 
     
     
         56 . The system according to  claim 55 , wherein said one or more circuits is operable to downconvert said multiplexed generated second plurality of channel signals, via said receiver chain, to corresponding baseband multiplexed channel signals. 
     
     
         57 . The system according to  claim 56 , wherein said one or more circuits is operable to generate separate signals from said downconverted baseband multiplexed channel signals. 
     
     
         58 . The system according to  claim 50 , wherein said one or more circuits is operable to orthogonally multiplex said generated second plurality of channel signals on to a receiver chain. 
     
     
         59 . The system according to  claim 50 , wherein said one or more circuits is operable to cancel interference, which is due to said generated first plurality of channel signals.