New sets of even-length binary Z-complementary pairs with asymptotic ZCZ ratio of 3/4

• Main Authors: Adhikary, Avik Ranjan, Majhi, Sudhan, Liu, Zilong, Guan, Yong Liang
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2020
• Subjects: Engineering::Electrical and electronic engineering; Even-length Binary Aperiodic Z-Complementary Pairs (EB-ZCPs); Golay Complementary Pair (GCP)
• Online Access: https://hdl.handle.net/10356/140241
• Institution: Nanyang Technological University

This letter is focused on increasing the zero correlation zone (ZCZ) of even-length binary Z-complementary pairs (EB-ZCPs). Till date, the maximum ZCZ ratio (i.e., ZCZ width over the sequence length) for systematically constructed EB-ZCPs is 2/3. In this letter, we give a construction of EB-ZCPs with lengths 2α +2 10β 26γ +2 (where α, β, and γ are nonnegative integers) and ZCZ widths 3 × 2α 10β 26γ +1, thus achieving asymptotic ZCZ ratio of 3/4. The proposed EB-ZCPs are constructed via proper insertion of concatenated odd-length binary ZCPs. The ZCZ width is proved by exploiting several newly identified intrinsic structure properties of binary Golay complementary pairs, obtained from Turyn's method. The proposed EB-ZCPs have aperiodic autocorrelation sums (AACS) magnitude of 4 outside the ZCZ region (except for the last time-shift taking AACS value of zero).