With emerging technologies like 6G, many new applications like autonomous systems evolve which have strict demands on the reliability of data communications. In this work, we consider a system with multiple slowly fading channels that constitute a diversity system. We show that the joint distribution of the fading coefficients has a tremendous impact on the outage performance of a communication system. In particular, we investigate the zero-outage capacity (ZOC) and characterize the joint fading distributions with a strictly positive ZOC. Interestingly, the set of joint distributions, that lead to positive ZOCs, is larger than a singleton in general. We also derive expressions for the maximum ZOC with respect to all possible joint distributions for selection combining (SC) as diversity combining technique at the receiver. For maximum ratio combining (MRC), we characterize the maximum ZOC within a finite number of bits. Finally, the results are evaluated explicitly for the special cases of Rayleigh fading and Nakagami-$m$ fading in order to quantify the ZOCs for common fading models.
翻译:随着6G等新兴技术的出现,许多新的应用,如自主系统等,都对数据通信的可靠性提出了严格的要求。在这项工作中,我们考虑到一个具有多重缓慢淡化渠道的系统,它构成了多样性系统。我们表明,衰减系数的联合分布对通信系统的流出性能产生了巨大影响。我们特别调查零耗尽能力(ZOC),并以严格正的ZOC来描述联合淡化分布。有趣的是,一系列联合分布,导致正的 ZOC,比一般的单吨还要大。我们还从所有可能的联合分布中得出ZOC的表达方式,将(SC)合并为接收方的混合技术。对于最大比例(MRC),我们将最大ZOC定在一定的位数内。最后,对Raylei Fading和Nakagami-m$$的特例进行了明确评价,以便量化常见的淡化模型的ZOC。