Method and System for Improved Cellular Diversity Receiver

Abstract

Aspects of a method and system for an improved cellular diversity receiver are described. Aspects of the system may include circuitry that enables generation of an initially decoded output bit sequence by a first frame process for a received bit sequence for a plurality of received multipath signals. The first frame process may utilize redundancy based decoding, which imposes at least one physical constraint during the decoding, which may be performed by a decoding algorithm.

What is claimed is: 
     
         1 . A method for signal processing, the method comprising:
 performing by one or more circuits a multi-layer decoding process comprising:
 generating, using a frame process, a first decoded output bit sequence from a received bit sequence for a plurality of received multipath signals, wherein the received bit sequence is derived from the plurality of received multipath signals using a first burst process iteration of a burst process, and wherein the burst process includes decoding one or more groups of encoded bits included within a frame; 
 if said first decoded output bit sequence fails verification, feeding back the first decoded output bit sequence; and 
 processing at least a portion of the fed-back first decoded output bit sequence by a second burst process iteration of the burst process, wherein the second burst process iteration is based on using a gradient search approach applied to a received signal and an estimate signal. 
   
     
     
         2 . The method according to  claim 1 , wherein the burst process includes a channel estimation operation and a channel equalization operation. 
     
     
         3 . The method according to  claim 2 , further comprising:
 modifying the channel estimation operation based on the fed-back first decoded output bit sequence.   
     
     
         4 . The method according to  claim 1 , wherein the frame process uses redundancy-based decoding, which imposes at least one physical constraint. 
     
     
         5 . The method according to  claim 1 , wherein the at least one physical constraint comprises one or more of a line spectral pair (LSP) set, a pitch delay, and a pitch gain. 
     
     
         6 . The method according to  claim 1 , wherein the at least one physical constraint comprises one or more of gain continuity, smoothness in inter-frames or intra-frames, and consistency of line spectral frequency (LSF) parameters used to represent a spectral envelope. 
     
     
         7 . The method according to  claim 1 , further comprising:
 combining via one or both of a maximal ratio combining and an equal gain combining, at least a portion of individual path signals in said plurality of received multipath signals.   
     
     
         8 . The method according to  claim 7 , wherein said combining includes using at least one channel estimate and at least one weighting factor, and wherein the at least one channel estimate and the at least one weighting factor are associated with an individual path signal in the at least portion of individual path signals. 
     
     
         9 . The method according to  claim 1 , wherein said plurality of received multipath signals comprises at least 3 individual path signals. 
     
     
         10 . The method according to  claim 1 , further comprising:
 generating a newly decoded output bit sequence by a subsequent frame process based on output from the second burst process iteration of the burst process.   
     
     
         11 . A system for signal processing, the system comprising:
 one or more circuits that are configured to:
 generate, using a frame process, a first decoded output bit sequence from a received bit sequence for a plurality of received multipath signals, wherein the received bit sequence is derived from the plurality of received multipath signals using a first burst process iteration of a burst process, and wherein the burst process includes being configured to decode one or more groups of encoded bits included within a frame; 
 if said first decoded output bit sequence fails verification, feed back the first decoded output bit sequence; and 
 process at least a portion of the fed-back first decoded output bit sequence by a second burst process iteration of the burst process, wherein the second burst process iteration is based on using a gradient search approach applied to a received signal and an estimate signal. 
   
     
     
         12 . The system according to  claim 11 , wherein the burst process includes a channel estimation operation and a channel equalization operation. 
     
     
         13 . The system according to  claim 12 , wherein the one or more circuits are further configured to:
 modify the channel estimation operation based on the fed-back first decoded output bit sequence.   
     
     
         14 . The system according to  claim 11 , wherein the frame process uses redundancy-based decoding, which imposes at least one physical constraint. 
     
     
         15 . The system according to  claim 11 , wherein the at least one physical constraint comprises one or more of a line spectral pair (LSP) set, a pitch delay, and a pitch gain. 
     
     
         16 . The system according to  claim 11 , wherein the at least one physical constraint comprises one or more of gain continuity, smoothness in inter-frames or intra-frames, and consistency of line spectral frequency (LSF) parameters used to represent a spectral envelope. 
     
     
         17 . The system according to  claim 11 , wherein the one or more circuits are further configured to:
 combine via one or both of a maximal ratio combining and an equal gain combining, at least a portion of individual path signals in said plurality of received multipath signals.   
     
     
         18 . The system according to  claim 17 , wherein the one or more circuits are further configured to combine by using at least one channel estimate and at least one weighting factor, and wherein the at least one channel estimate and the at least one weighting factor are associated with an individual path signal in the at least portion of individual path signals. 
     
     
         19 . The system according to  claim 11 , wherein said plurality of received multipath signals comprises at least 3 individual path signals. 
     
     
         20 . The system according to  claim 11 , wherein the one or more circuits are further configured to:
 generate a newly decoded output bit sequence by a subsequent frame process based on output from the second burst process iteration of the burst process.