信号
频道（广播）
简单（哲学）
信号（编程语言）
二进制数
信道容量
计算机科学
拓扑（电路）
算法
数学
电信
算术
组合数学
哲学
数理经济学
认识论
程序设计语言
标识
DOI：10.1002/j.1538-7305.1952.tb01393.x
摘要
Two channels are considered; a discrete channel which can transmit sequences of binary digits, and a continuous channel which can transmit band limited signals. The performance of a large number of simple signalling alphabets is computed and it is concluded that one cannot signal at rates near the channel capacity without using very complicated, alphabets.
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