– Although many space-time codes sacrifice their rate in order to achieve a high diversity order, such a sacrifice is not necessary. Recent work has reported two instances of a linear space-time code that achieves both a full rate of min(t, r) and a full diversity order of tr over a t-input r-output Rayleigh-fading channel [1][2]. We show that such full-rate full-diversity codes are plentiful a...

Introduction: There is increasing interest [1], [2], [3], [4] in space-time coding for multiple input multiple output (MIMO) frequency selective wireless channels. This paper addresses space-time code design for such channels from a single carrier perspective. We derive code construction criterion for exploiting full spatio-temporal diversity in the channel. We analyze the delay diversity code ...

SufJicient conditions to ensure QAM space-time codes achieve full space diversity in quasi-static fading channel are presented. The conditions are on code words or generator matrices instead of on every code word pair. This simpl@es the check of full space diversity of a code. Based on these conditions, full space diversity parallel concatenated turbo codes are proposed to use in a multiple ele...

It has been shown that a complex orthogonal design that provides full diversity and full transmission rate for a space–time block code is not possible for more than two antennas. Previous attempts have been concentrated in generalizing orthogonal designs which provide space–time block codes with full diversity and a high transmission rate. In this work, we design rate one codes which are quasi-...

biodiversity/biological diversity Species, genetic, and ecosystem diversity in an area, sometimes including associated abiotic components such as landscape features, drainage systems, and climate. diversity indices Measures that describe the different components of biodiversity, such as species richness (alpha diversity), beta and gamma diversity, endemicity, and higher taxon richness. ecosyste...

In a multi-user communication system, cooperative diversity allows single-antenna mobile sets to achieve transmit diversity. Cooperative diversity improves the communication capacity and enhances the robustness of a wireless link when a single channel alone is not reliable. In this paper, a novel cooperative diversity scheme is introduced that enables simultaneous transmission of non-redundant ...