Armario Sampalo, José AndrésFlannery, D. L.2019-06-132019-06-132019Armario Sampalo, J.A. y Flannery, D.L. (2019). Generalized binary arrays from quasi-orthogonal cocycles. Designs, Codes and Cryptography, 87 (march 2019)0925-1022https://hdl.handle.net/11441/87410Generalized perfect binary arrays (GPBAs) were used by Jedwab to construct perfect binary arrays. A non-trivial GPBA can exist only if its energy is 2 or a multiple of 4. This paper introduces generalized optimal binary arrays (GOBAs) with even energy not divisible by 4, as analogs of GPBAs. We give a procedure to construct GOBAs based on a characterization of the arrays in terms of 2-cocycles. As a further application, we determine negaperiodic Golay pairs arising from generalized optimal binary sequences of small length.application/pdfengAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/articleinfo:eu-repo/semantics/embargoedAccesshttps://doi.org/10.1007/s10623-019-00626-9