Computational efficient convolutional coding with rate matching

An error coding circuit comprising:

• a non-systematic convolutional encoder for coding an input bit stream to produce two or more groups of parity bits;
• an interleaver circuit for interleaving parity bits within each group of parity bits wherein said interleaver circuit is configured to apply different interleaving for each group of parity bits;
• and
• a rate-matching circuit for outputting a selected number of said interleaved parity bits ordered by group to obtain a desired code rate.

An error coding circuit comprising:

• a non-systematic convolutional encoder for coding an input bit stream to produce two or more groups of parity bits;
• an interleaver circuit for interleaving parity bits within each group of parity bits;
• and
• a rate-matching circuit for outputting a selected number of said interleaved parity bits ordered by group to obtain a desired code rate, wherein said rate matching circuit outputs odd parity bits within each group prior to even parity bits.

A method for error coding an input bit stream, said method comprising:

• coding said input bit stream in a non-systematic convolutional encoder to produce two or more groups of parity bits;
• interleaving parity bits within each group of parity bits;
• outputting a selected number of said interleaved parity bits ordered by group to obtain a desired code rate;
• and
• group multiplexing said parity bits in a group multiplexing circuit while said bits are being output.

A method for error coding an input bit stream, said method comprising:

• coding said input bit stream in a non-systematic convolutional encoder to produce two or more groups of parity bits;
• interleaving parity bits within each group of parity bits wherein different interleaving is applied to each group of parity bits;
• and
• outputting a selected number of said interleaved parity bits ordered by group to obtain a desired code rate.

A method for error coding an input bit stream, said method comprising:

• coding said input bit stream in a non-systematic convolutional encoder to produce two or more groups of parity bits;
• interleaving parity bits within each group of parity bits;
• and
• outputting a selected number of said interleaved parity bits ordered by group to obtain a desired code rate, wherein outputting a selected number of said interleaved parity bits ordered by group to obtain a desired code rate further comprises outputting odd parity bits within each group before outputting even parity bits.