CAJ | 학술논문

针对IEEE 802.16e标准QC-LDPC码的码长和码率有限，及其采用的准双对角线结构包含大量度为2的变量节点导致较高错误平层的缺陷，提出一种基于滑动矩形窗和准三对角线结构的QC-LDPC码的快速编码算法，可以灵活地扩展码长和码率的范围，改善纠错性能，降低编码复杂度，适合于变速率的自适应传输系统。
침대IEEE 802.16e표준QC-LDPC마적마장화마솔유한，급기채용적준쌍대각선결구포함대량도위2적변량절점도치교고착오평층적결함，제출일충기우활동구형창화준삼대각선결구적QC-LDPC마적쾌속편마산법，가이령활지확전마장화마솔적범위，개선규착성능，강저편마복잡도，괄합우변속솔적자괄응전수계통。
QC-LDPC codes with slide rectangular window and quasi tri-diagonal structure are proposed, the more flexible code lengths and code rates of QC-LDPC codes are expanded by using slide rectangular window in the base check matrix, the degree distribution is optimized by the optimal diagonal method. The error floors of QC-LDPC codes are lower by using quasi tri-diagonal structure which appropriately selects the location of the third diagonal in the base check matrix to partly eliminate variable nodes of degree-2. Simulation results show the proposed QC-LDPC codes can not only flexibly expand the code lengths and code rates but also reduce the encoding complexity and improve the BER performance compared to quasi dual-diagonal structure in IEEE 802. 16e QC-LDPC codes, they are available and suitable for the adaptive transmis-sion systems and hardware implementation.