摘要
在比特交织编码调制及迭代译码(BICM-ID)系统基础上,设计一种8PSK调制星座映射方法。该方法以映射符号之间的平均近邻汉明距离为设计准则,将8PSK调制的符号分为2组半径和相位不同的QPSK调制的映射符号,通过调整半径减小星座映射符号之间的平均近邻汉明距离。性能分析和仿真结果表明,与其他BICM-ID中的8PSK星座映射相比,在低信噪比下,该方法的误比特率更低。
A new signal constellation mapping scheme of 8PSK modulation is proposed for Bit Interleaved Coded Modulation with Iteratively Decoding（BICM-ID）.The scheme which is based on the signal labeling designs criterion of the average near neighbor hamming distance in low SNR,the symbol is divided into two QPSK with different radius and phases.It reduces the average near neighbor hamming distance by way of adjusting radius.Performance analysis and simulation results show that the proposed scheme achieves better performance than the convectional signal mapping for BICM-ID in low SNR.
出处
《计算机工程》
CAS
CSCD
2012年第23期263-265,共3页
Computer Engineering
基金
国家自然科学基金资助项目"基于非线性度量的复杂工业过程多模型分解及一体化控制方法研究"(61104079)
关键词
比特交织编码调制
迭代译码
平均近邻汉明距离
低信噪比
星座映射
误比特率
Bit Interleaved Coded Modulation（BICM）
Iteratively Decoding（ID）
average near neighbor hamming distance
low SNR
constellation mapping
bit error rate
