Almost Perfect Sequences and Periodic Complementary Sequence Pairs over the 16-QAM Constellation

作者：Zeng Fanxin^*; Zeng Xiaoping; Zhang Zhenyu; Xuan Guixin

来源：IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences, 2012, E95A(1): 400-405.

DOI：10.1587/transfun.E95.A.400

• 16-QAM sequence
• almost perfect sequence
• periodic complementary sequence pair
• quadriphase perfect sequence
• autocorrelation

Based on quadriphase perfect sequences and their cyclical shift versions, three families of almost perfect 16-QAM sequences are presented. When one of two time shifts chosen equals half a period of quadriphase sequence employed and another is zero, two of the proposed three sequence families possess the property that their out-of-phase autocorrelation function values vanish except one. At the same time, to the other time shifts, the nontrivial autocorrelation function values in three families are zero except two or four. In addition, two classes of periodic complementary sequence (PCS) pairs over the 16-QAM constellation, whose autocorrelation is similar to the one of conventional PCS pairs, are constructed as well.

• 出版日期2012-1
• 单位重庆大学; 中国人民解放军重庆通信学院