In detail , they are bit - interleaved coded modulation ( with iterative decoding ) , low - density parity - check codes and stf technology . by the performance analysis of bicm ( - id ) , which can make code and modulation optimal separately , and achieve maximum possible coding diversity as well as modulation gain , guidelines for its design and an easy algorithm for siso are proposed . design of capacity - approaching of ldpc codes and efficient encoding of them as well as several kinds of its decoding algorithms are investigated 具體的講,就是討論了基于比特交織的編碼調制技術,并給出了映射方式的設計準則以及核心模塊siso的一種簡單的f - map算法;研究了編碼最小漢明距隨碼長線性增加的ldpc碼的幾個方面的問題,包括接近香農限碼子集的度分布對的設計、有效編碼器的實現和各種譯碼算法的優缺點,并對基于ldpc碼的bicm應用于ofdm傳輸系統中的性能進行了仿真。