求翻译：研究了多径信道条件下基于最大化最小准则的 佳中继选择的分集阶数。首先将 佳中继的接收信噪比的PDF和CDF以及端到端瞬时信噪比相结合得到误码率的上界，然后推导出分集阶数的理论上界。理论分析与结果表明：分集阶数与可用中继数目和多径信道路径数目成正比，与所选中继的序号成反比。是什么意思？

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The multi-path to channel conditions based on maximizing the minimum norms of better trunk Select set order of The first will be the better trunk receive signal-to-noise ratio of the PDF and CDF as well as end-to-end transient signal-to-noise ratio combined with error rate, and then the upper bounda

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Research of multi-path channel conditions based on relay selection diversity for maximum minimum order. First relay receives the signal to noise ratio of the PDF and CDF, and end-to-end combination upper bounds and error code of instantaneous signal to noise ratio and diversity level upper bound is

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