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Structured dispersion matrices from division algebra codes for space-time shift keying

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3 Author(s)
Rajashekar, R. ; Dept. of Electr. Commun. Eng., Indian Inst. of Sci., Bangalore, India ; Hari, K.V.S. ; Hanzo, L.

We propose a novel method of constructing Dispersion Matrices (DM) for Coherent Space-Time Shift Keying (CSTSK) relying on arbitrary PSK signal sets by exploiting codes from division algebras. We show that classic codes from Cyclic Division Algebras (CDA) may be interpreted as DMs conceived for PSK signal sets. Hence various benefits of CDA codes such as their ability to achieve full diversity are inherited by CSTSK. We demonstrate that the proposed CDA based DMs are capable of achieving a lower symbol error ratio than the existing DMs generated using the capacity as their optimization objective function for both perfect and imperfect channel estimation.

Published in:

Signal Processing Letters, IEEE  (Volume:20 ,  Issue: 4 )