CAJ | 학술논문

该文用一种级联码模型描述了LDPC编码高阶调制系统.该级联码模型以LDPC码为外码,二-十进制转换码为内码,再加一个删余模块构成.基于这种级联码模型,该文给出了其联合校验方程和二分图,并提出了级联码置信度传播算法,实现了LDPC编码高阶调制系统的联合解调解码.仿真表明,该文提出的联合解调解码算法有效地改进了LDPC编码高阶调制系统的性能.
해문용일충급련마모형묘술료LDPC편마고계조제계통.해급련마모형이LDPC마위외마,이-십진제전환마위내마,재가일개산여모괴구성.기우저충급련마모형,해문급출료기연합교험방정화이분도,병제출료급련마치신도전파산법,실현료LDPC편마고계조제계통적연합해조해마.방진표명,해문제출적연합해조해마산법유효지개진료LDPC편마고계조제계통적성능.
A concatenated code model is proposed for high-order Low-Density Parity-Check (LDPC) coded- modulation scheme. This model is comprised of a serial concatenation of an outer LDPC encoder, an inner Binary-Decimal Conversion (BDC) encoder and a puncture device. A joint parity-check matrix is derived for the concatenated code, and the corresponding joint demodulation and decoding algorithm, named Concatenated-Code Belief Propagation (CCBP), is presented. Simulation results show that this LDPC coded modulation scheme with the CCBP algorithm provides effective improvements relative to the Bit Interleaved Coded Modulation (BICM) scheme for high-order modulations.