Abstract
A 3-phase Golay complementary triad (GCT) is a set of three sequences over the 3-phase alphabet {1, ω, ω2}, where \(\omega =e^{\frac {2\pi \sqrt {-1}}{3}}\) is a 3rd root of unity, whose aperiodic autocorrelations sum up to zero for each out-of-phase non-zero time-shifts. Recent results by Avis and Jedwab proved the non-existence of 3-phase GCTs of length N ≡ 4 (mod 6). In this paper, we introduce 3-phase Z-complementary triads (ZCTs) and almost-complementary triads (ACTs). We present systematic constructions of 3-phase ZCTs for various lengths including the case when N ≡ 4 (mod 6). We also analyse the peak-to-mean envelope power ratio (PMEPR) upper-bounds of the proposed ZCTs and ACTs.
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Liu, C., Liu, S., Lei, X. et al. Three-phase Z-complementary triads and almost complementary triads. Cryptogr. Commun. 13, 763–773 (2021). https://doi.org/10.1007/s12095-021-00509-8
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DOI: https://doi.org/10.1007/s12095-021-00509-8
Keywords
- Almost-complementary triads (ACTs)
- Aperiodic correlation
- Z-complementary triads (ZCTs)
- Golay complementary triads (GCTs)
- Zero correlation zone (ZCZ)