System and method for decoding encoded messages in a wireless communication system

Abstract

Aspects of the subject disclosure may include, for example, obtaining a received channel-encoded data block having information bits, a transmitted error-check value, and redundant code bits. The redundant code bits correspond to a channel code applied to the received channel-encoded data block prior to transmission via a communication channel. A channel code type is identified and responsive to it being systematic, the information bits and the transmitted error-check value are obtained without decoding according to the channel code. The received channel-encoded data block is checked according to the transmitted error-check value to obtain a result. Responsive to the result not indicating an error, extracting the information bits without decoding the received channel-encoded data block according to the channel code. Responsive to the result indicating an error, decoding the received channel-encoded data block according to the channel code to obtain decoded information bits. Other embodiments are disclosed.

What is claimed is: 
     
         1 . A method, comprising:
 determining, by a processing system, whether a systematic channel code has been applied to a channel encoded data block prior to being transmitted via a communication channel; and   responsive to a determination that the systematic channel code has been applied, obtaining, by the processing system according to the systematic channel code, information bits and a transmitted error check value from the channel encoded data block without decoding the channel encoded data block.   
     
     
         2 . The method of  claim 1 , wherein the obtaining of the information bits and the transmitted error check value is according to predetermined locations in the channel encoded data block. 
     
     
         3 . The method of  claim 1 , further comprising error checking the channel encoded data block based on a comparison of the transmitted error check value with a locally determined error check value. 
     
     
         4 . The method of  claim 3 , further comprising determining, by the processing system, that a link characteristic of the communication channel satisfies a threshold, wherein the obtaining of the information bits and the transmitted error check value is based on the link characteristic of the communication channel satisfying the threshold. 
     
     
         5 . The method of  claim 4 , wherein the link characteristic comprises a signal-to-interference-plus-noise ratio (SINR). 
     
     
         6 . The method of  claim 4 , further comprising forwarding the information bits as a receiver output. 
     
     
         7 . The method of  claim 1 , wherein the systematic channel code comprises a low-density parity check code (LDPC). 
     
     
         8 . The method of  claim 1 , wherein the transmitted error check value comprises a cyclic redundancy check (CRC) code. 
     
     
         9 . The method of  claim 1 , wherein the obtaining of the information bits without decoding the channel encoded data block, further comprises extracting, by the processing system, the information bits from the channel encoded data block. 
     
     
         10 . A device, comprising:
 a processing system including a processor; and   a memory that stores executable instructions that, when executed by the processing system, facilitate performance of operations, the operations comprising:   determining whether a systematic channel code has been applied to a channel encoded data block prior to being transmitted via a communication channel; and   responsive to a determination that the systematic channel code has been applied, obtaining, according to the systematic channel code, information bits and a transmitted error check value from the channel encoded data block without decoding the channel encoded data block, wherein the obtaining of the information bits and the transmitted error check value is according to predetermined locations in the channel encoded data block.   
     
     
         11 . The device of  claim 10 , wherein the systematic channel code comprises a low density parity check (LDPC) code. 
     
     
         12 . The device of  claim 10 , wherein the operations comprise forwarding the information bits as a receiver output. 
     
     
         13 . The device of  claim 10 , wherein the transmitted error check value comprises a cyclic redundancy check (CRC) code. 
     
     
         14 . A non-transitory, machine-readable medium, comprising executable instructions that, when executed by a processing system including a processor, facilitate performance of operations, the operations comprising:
 determining whether a systematic channel code has been applied to a channel   encoded data block prior to being transmitted via a communication channel; and   responsive to a determination that the systematic channel code has been applied, obtaining, according to the systematic channel code, information bits and a transmitted error check value from the channel encoded data block without decoding the channel encoded data block.   
     
     
         15 . The non-transitory, machine-readable medium of  claim 14 , wherein the obtaining of the information bits and the transmitted error check value is according to predetermined locations in the channel encoded data block. 
     
     
         16 . The non-transitory, machine-readable medium of  claim 14 , wherein the operations further comprise error checking the channel encoded data block based on a comparison of the transmitted error check value with a locally determined error check value. 
     
     
         17 . The non-transitory, machine-readable medium of  claim 16 , wherein the operations further comprise determining that a link characteristic of the communication channel satisfies a threshold, wherein the obtaining of the information bits and the transmitted error check value is based on the link characteristic of the communication channel satisfying the threshold. 
     
     
         18 . The non-transitory, machine-readable medium of  claim 17 , wherein the link characteristic comprises a signal-to-interference-plus-noise ratio (SINR). 
     
     
         19 . The non-transitory, machine-readable medium of  claim 16 , wherein the operations further comprise forwarding the information bits as a receiver output. 
     
     
         20 . The non-transitory, machine-readable medium of  claim 14 , wherein the operations further comprise systematic channel code comprises a low-density parity check code (LDPC).