Modulation Doping for Repetition Coded BICM-ID with Irregular Degree Allocation

A new BICM-ID technique that makes efficient use of a mixture of standard Gray and anti-Gray extended mapping, combined with irregular degree-allocated repetition code with check nodes. It is shown that with the proposed technique, very low rate codes that can achieve turbo cliff at a very low Es/N0 value range can well be designed, and that the EXIT chart analysis and chain simulation results are exactly consistent with each other. Index terms extended mapping; repetition code; irregular node allocation; EXIT analysis; turbo cliff; capacity;