An Alamouti-Eisenstein code over Z[w] delivers 0.79 dB asymptotic energy gain and improved finite-blocklength reliability compared to the classical Alamouti code over Z[i] due to A2+A2 hexagonal geometry.
Available: https://www.itu.int/dms pubrec/itu-r/rec/m/ R-REC-M.2160-0-202311-I-21-21PDF-E.pdf
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Finite-Blocklength Analysis of Alamouti Codes over Eisenstein Integers
An Alamouti-Eisenstein code over Z[w] delivers 0.79 dB asymptotic energy gain and improved finite-blocklength reliability compared to the classical Alamouti code over Z[i] due to A2+A2 hexagonal geometry.