摘要
针对调制解调方式的高效性,提出低自相关值的16-QAM序列,使用完美的二元序列构造完美的4-QAM序列,基于完美的4-QAM序列构造完美的16-QAM序列,对所构造的完美16-QAM序列的能量效率进行分析,提出用完美的4-QAM序列和交织结构构造几乎完美的16-QAM序列,并给出了相应条件。
In view of enhancing the modulation efficiency of communication system, the 16-QAM sequences having low auto-correlation values are proposed, and the perfect 4-QAM sequences are constructed by the perfect binary sequences, and the perfect 16-QAM sequences based on the perfect 4-QAM sequences are constructed. In addition, the energy effi-ciency of the constructed perfect 16-QAM sequences is analyzed. A new construction of almost perfect 16-QAM sequences by using the perfect 4-QAM sequences and interleaved structures is provided, and the corresponding condition is presented.
出处
《计算机工程与应用》
CSCD
2014年第14期100-102,218,共4页
Computer Engineering and Applications
基金
国家自然科学基金青年基金资助项目(No.1008GBA13001)
关键词
正交幅度调制(QAM)
完美序列
几乎完美序列
自相关值
能量效率
Quadrature Amplitude Modulation（QAM）
perfect sequences
almost perfect sequences
autocorrelation val-ues
energy efficiency
