2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/134278In this paper, we introduce the notion of perfect space-time block codes (STBC). These codes have full rate, full diversity, non-vanishing constant minimum determinant for increasing spectral efficiency, uniform average transmitted energy per antenna and good shaping. We present algebraic constructions of perfect STBCs for 2, 3, 4 and 6 antennas.39 pages, 7 figures, submitted to IEEE Trans. on Inform. Theory Sep. 2004, revised versionInformation TheoryH.1.1text