论文部分内容阅读
本文介绍一种数字数据传输系统,在频带受限制的传输信道上,大大的增加二进制数据信号传输速率,为把二进制输入信号转换成被传输的多电平非二进制相关信号,采用了新奇的预编码相关技术。为了使传输速率改进因子达到8倍,被传输电平数目要求为7,其每个电平代表原来二进制数字的一种特殊的组合,同时由于在发射端引入相关特性便可以在接收端无须参考过去的波形而用标准的逻辑电路即可恢复出原始的二进制数据。被传输信号的相关特性也使得无须在发射端增加多余的数字便可检出错误。这个概念的比特速率的能力并不限制为二进制系统的八倍,而通常在载波应用中它等于每赫2log_2Q,其中Q等于一个非相关非二进制信号的电平数,并且是大于二的整数。
This article describes a digital data transmission system that greatly increases the binary data signal transmission rate over a limited frequency transmission channel and uses a novel, pre-existing system for converting a binary input signal into a multi-level non-binary related signal to be transmitted Coding related technologies. In order to make the transmission rate improvement factor up to 8 times, the number of transmission levels required for the 7, each level represents the original binary number of a special combination, at the same time as the launch of the relevant characteristics of the receiver can be without reference Past the waveform and use the standard logic circuit to restore the original binary data. The characteristics of the transmitted signal also make it possible to detect errors without adding extra digits to the transmitter. The bit rate capability of this concept is not limited to eight times that of a binary system, but it is typically equal to 2log_2Q per Hertz in a carrier application, where Q is equal to the number of levels of an uncorrelated non-binary signal and is an integer greater than two.