Encoding system and method for a transmitter in wireless communications

Abstract

Method and system encodes a signal according to a code rate that includes a ratio of uncoded bits to coded bits. An outer encoder encodes the signal into code words. An interleaver converts the code words into a byte sequence for wireless transmission. An inner encoder executes a convolutional code to generate an encoded signal. The encoded signal is transmitted over a plurality of subcarriers associated with a wide bandwidth channel having a spectral efficiency associated with the code rate. The outer encoder includes a Reed-Solomon encoder having a rate that increases the code rate of uncoded bits to coded bits.

1 . A system for generating a signal for wireless communication, the system comprising: 
 an outer encoder to execute outer encoding having a first rate on a signal to generate at least one code word;    an interleaver to interleave said at least one code word into a byte sequence;    an inner encoder to execute convolutional encoding having a second rate on said byte sequence to generate an encoded signal,    wherein said first rate and said second rate produce an overall coding rate corresponding with a spectral efficiency.    
   
   
       2 . The system of  claim 1 , wherein said overall coding rate comprises a ratio of uncoded bits in said signal to coded bits in said encoded signal.  
   
   
       3 . The system of  claim 1 , wherein said outer encoder includes a Reed-Solomon encoder.  
   
   
       4 . The system of  claim 1 , wherein said outer encoding includes Reed-Solomon encoding.  
   
   
       5 . The system of  claim 1 , further comprising a plurality of subcarriers to transmit said encoded signal over a wide bandwidth channel corresponding to said spectral efficiency.  
   
   
       6 . The system of  claim 5 , wherein said wide bandwidth channel includes a bandwidth of approximately 40 MHz.  
   
   
       7 . The system of  claim 1 , wherein said inner encoder punctures said convolutional encoding to generate said encoded signal.  
   
   
       8 . The system of  claim 7 , wherein said inner encoder punctures at a ⅞ puncture rate.  
   
   
       9 . A method for generating a signal for wireless communication, the method comprising: 
 executing an outer encoding process on a signal, wherein said outer encoding process has a first rate;    generating at least one code word from said outer encoding;    interleaving said at least one code word into a byte sequence; and    convolutionally encoding said byte sequence according to a second rate, wherein said convolutionally encoding includes generating an encoded signal according to an overall coding rate produced by said first rate and said second rate, wherein said overall coding rate corresponds to a spectral efficiency.    
   
   
       10 . The method of  claim 9 , wherein said executing said outer encoding process comprises using a Reed-Solomon encoding process.  
   
   
       11 . The method of  claim 9 , wherein said convolutionally encoding comprises puncturing said byte sequence.  
   
   
       12 . The method of  claim 9 , wherein said interleaving comprises converting said at least one code word into bytes within said byte sequence.  
   
   
       13 . The method of  claim 9 , further comprising transmitting said encoded signal over a plurality of subcarriers for a wide bandwidth channel corresponding to said spectral efficiency.  
   
   
       14 . A device to generate a signal for wireless communication, the device configured to: 
 execute an outer encoding process on a signal, wherein said outer encoding process has a first rate;    generate at least one code word from said outer encoding;    interleave said at least one code word into a byte sequence; and    convolutionally encode said byte sequence according to a second rate to generate an encoded signal according to an overall coding rate produced by said first rate and said second rate, wherein said overall coding rate corresponds to a spectral efficiency.    
   
   
       15 . The device of  claim 14 , said device further configured to use an outer encoder for said outer encoding process.  
   
   
       16 . The device of  claim 15 , wherein said outer encoder is configured to use a Reed-Solomon encoding process for said outer encoding process.  
   
   
       17 . The device of  claim 14 , said device further configured to use an inner encoder to convolutionally encode said byte sequence.  
   
   
       18 . The device of  claim 17 , wherein said inner encoder is configured to puncture said byte sequence to generate said encoded signal.  
   
   
       19 . A method for encoding a signal for wireless transmission, the method comprising: 
 generating a code word from a signal using a Reed-Solomon encoding process, wherein said Reed-Solomon encoding process has a first rate; and    generating an encoded signal from said code word using a convolutional encoding process having a second rate, wherein said first rate and said second rate produce an overall coding rate applicable having a spectral efficiency for a wide bandwidth transmission.    
   
   
       20 . The method of  claim 19 , further comprising converting said code word to a byte sequence.  
   
   
       21 . The method of  claim 19 , further comprising transmitting said encoded signal within a channel suitable for said wide bandwidth transmission.  
   
   
       22 . The method of  claim 20 , further comprising puncturing said byte sequence.  
   
   
       23 . A system for encoding a signal, the signal comprising: 
 first generating means for generating a code word from a signal using a Reed-Solomon encoding process, wherein said Reed-Solomon encoding process has a first rate; and    second generating means for generating an encoded signal from said code word using a convolutional encoding process having a second rate, wherein said first rate and said second rate produce an overall coding rate having a spectral efficiency applicable for a wide bandwidth transmission.    
   
   
       24 . The system of  claim 23 , further comprising transmitting means for comprising transmitting said encoded signal within a channel suitable for said wide bandwidth transmission.  
   
   
       25 . The system of  claim 23 , further comprising converting means for converting said code word to a byte sequence.  
   
   
       26 . The system of  claim 25 , further comprising puncturing means for puncturing said byte sequence.  
   
   
       27 . A system for generating a signal for wireless communication, the system comprising: 
 executing means for executing an outer encoding process on a signal, wherein said outer encoding process has a first rate;    generating means for generating at least one code word from said outer encoding;    interleaving means for interleaving said at least one code word into a byte sequence; and    encoding means for convolutional encoding said byte sequence, wherein said convolutional encoding has a second rate to generate an encoded signal according to an overall coding rate produced by said first rate and said second rate, wherein said overall coding rate corresponds to a spectral efficiency.