Loading methods for wireline and wireless transmission systems are explained and reviewed to allow examination of fundamental equivalences between approaches to optimum transmission with linear cross-dimensional interference. Shannon’s famous water-filling method is then re-interpreted by examining the difference between mutual information and the constellation size used on each tone. Results reinforce that highest performance in all methods retains use of Shannon’s water-filling. However, results also find that a constant-size constellation on all energized water-filling dimensions, when used with a good code and an appropriate joint maximum-likelihood decoder, is sufficient to approximate this highest performance. This means that tone-dependent constellation variation is not necessary, which increases receiver complexity but reduces the need for channel-state feedback. This then leads to some adaptive MCS (modulation and coding scheme) equivalent loading methods that can be applied generally to wireline and wireless transmission.

中文翻译：

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多维传输中的最佳等效负载

解释并回顾了有线和无线传输系统的加载方法，以检查具有线性横截面干扰的最佳传输方法之间的基本等效性。然后，通过检查互信息和每个音调上使用的星座图大小之间的差异，重新诠释香农著名的注水方法。结果表明，所有方法中的最高性能都保留了香农的注水功能。但是，结果还发现，当与良好的代码和适当的联合最大似然解码器一起使用时，所有通电注水尺寸上的大小恒定的星座图足以近似此最高性能。这意味着不需要音调相关的星座变化，这增加了接收机的复杂性，但减少了对信道状态反馈的需求。然后，这导致了一些自适应的MCS（调制和编码方案）等效加载方法，这些方法通常可应用于有线和无线传输。