4 problems

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Real quasi-orthogonality conjecture for nth-order GABBA reduced channel matrices
Nth-order real quasi-orthogonality conjecture. The permuted matrix satisfies
Conjectureopenorthogonal-designs space-time-block-codesarXiv posted 3 days ago
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Real quasi-orthogonality conjecture for second-order GABBA reduced channel matrices
Second-order real quasi-orthogonality conjecture. The matrix $\mathbf{H}^2_{K/4}$ is real quasi-orthogonal. After permuting its columns according to the index sets…
Conjectureopenorthogonal-designs space-time-block-codesarXiv posted 3 days ago
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Real quasi-orthogonality pattern conjecture for GABBA reduced channel matrices
Real quasi-orthogonality conjecture. The permutation above is real quasi-orthogonal: the $\boldsymbol{p}_{0:N}$ -indexed columns and rows of the $N$ -by- $N$ GABBA reduced encoded cha…
Conjectureopenorthogonal-designs space-time-block-codesarXiv posted 3 days ago
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Tirkkonen's iterative ABBA construction conjecture
The ABBA scheme is a construction for quasi-orthogonal space-time block codes. Tirkkonen's conjecture. Larger ABBA space-time block codes could probably be constructed by repeatedl…
Conjectureopencoding-theory space-time-block-codesarXiv posted 3 days ago

Real quasi-orthogonality conjecture for nth-order GABBA reduced channel matrices