System correcting random and/or burst errors using RS (Reed-Solomon) code, turbo/LDPC (Low Density Parity Check) code and convolutional interleave

An apparatus, comprising:

• a RS (Reed-Solomon) encoder that is operable to encode an input bit stream thereby generating a RS coded bit stream;
• a separator that is operable to partition the RS coded bit stream into a first RS coded bit stream and a second RS coded bit stream;
• a first interleaver that is operable to interleave the first RS coded bit stream thereby generating an m-bit symbol sequence;
• a convolutional interleaver that is operable to interleave the second RS coded bit stream thereby generating a scrambled second RS coded bit stream;
• an encoder that is operable to encode the scrambled second RS coded bit stream, using an LDPC (Low Density Parity Check) code or a turbo code, thereby generating an LDPC or turbo coded bit stream;
• a second interleaver that is operable to interleave the LDPC or turbo coded bit stream thereby generating an n-bit symbol sequence;
• and
• a symbol mapper that is operable to:
• receive the m-bit symbol sequence;
• receive the n-bit symbol sequence;
• combine selected m-bit symbols from the m-bit symbol sequence and selected n-bit symbols from the n-bit symbol sequence thereby generating an m+n bit symbol sequence;
• and
• symbol map the m+n bit symbol sequence according to a constellation having 2(m+n) constellation points and a corresponding mapping of the 2(m+n) constellation points thereby generating a sequence of discrete valued modulation symbols.

A method, comprising:

• encoding a first bit stream using a RS (Reed-Solomon) code thereby generating a RS coded bit stream;
• interleaving the RS coded bit stream using a first interleave thereby generating an m-bit symbol sequence;
• encoding a second bit stream using an LDPC (Low Density Parity Check) code or a turbo code thereby generating an LDPC or turbo coded bit stream;
• interleaving the LDPC or turbo coded bit stream using a second interleave thereby generating an n-bit symbol sequence;
• combining selected m-bit symbols from the m-bit symbol sequence and selected n-bit symbols from the n-bit symbol sequence thereby generating an m+n bit symbol sequence;
• symbol mapping the m+n bit symbol sequence according to a constellation having 2(m+n) constellation points and a corresponding mapping of the 2(m+n) constellation points thereby generating a sequence of discrete valued modulation symbols;
• convolutional interleaving the sequence of discrete valued modulation symbols thereby generating a scrambled sequence of discrete valued modulation symbols;
• transforming the scrambled sequence of discrete valued modulation symbols into a continuous time transmit signal that comports with a communication channel;
• and
• launching the continuous time transmit signal into the communication channel.

A method, comprising:

• encoding an input bit stream using a RS (Reed-Solomon) code thereby generating a RS coded bit stream;
• separating the RS coded bit stream into a first RS coded bit stream and a second RS coded bit stream;
• interleaving the first RS coded bit stream using a first interleave thereby generating an m-bit symbol sequence;
• convolutional interleaving the second RS coded bit stream using a first convolutional interleave thereby generating a scrambled second RS coded bit stream;
• encoding the scrambled second RS coded bit stream, using an LDPC (Low Density Parity Check) code or a turbo code, thereby generating an LDPC or turbo coded bit stream;
• interleaving the LDPC or turbo coded bit stream using a second interleave thereby generating an n-bit symbol sequence;
• and
• combining selected m-bit symbols from the m-bit symbol sequence and selected n-bit symbols from the n-bit symbol sequence thereby generating an m+n bit symbol sequence;
• symbol mapping the m+n bit symbol sequence according to a constellation having 2(m+n) constellation points and a corresponding mapping of the 2(m+n) constellation points thereby generating a sequence of discrete valued modulation symbols;
• convolutional interleaving the sequence of discrete valued modulation symbols using a second convolutional interleave thereby generating a scrambled sequence of discrete valued modulation symbols;
• transforming the scrambled sequence of discrete valued modulation symbols into a continuous time transmit signal that comports with a communication channel;
• and
• launching the continuous time transmit signal into the communication channel.