MIDO space-time codes from associative and nonassociative cyclic algebras

Nonassociative division algebras have been recently proposed as an alternative way to design fully-diverse space-time codes. In particular, nonassociative cyclic algebras provide division algebras more easily than their associative counter-part. In this paper, we propose a few space-time code constructions coming from both associative and nonassociative cyclic algebras of degree 4, suitable for 4 transmit and 2 receive antennas, which furthermore exhibit good fast-decodability.