Opportunistic space-time block codes
Rate and diversity impose a fundamental tradeoff in space-time coding. High-rate space-time codes come at a cost of lower diversity, and high reliability (diversity) implies a lower rate. In , , we 1 proposed a different point of view where we designed high-rate space-time codes that have a high-diversity code embedded within them. This allows a form of wireless communications where the highrate code opportunistically takes advantage of good channel realizations while the embedded high-diversity code ensures that at least part of the information is decoded reliably. In , , we presented the code design strategy, criteria, and several constructions. In this paper, our focus is on decoding algorithms, quantifying the performance of the code examples in ,  and presenting new examples.
Das, S; Al-Dhahir, N; Diggavi, S; Calderbank, R
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