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信号处理:预加重(pre-emphasis)和去加重(De-emphasis)
随着信号速率的增加,信号在传输链路上的衰减越来越严重。传统意义上来讲,信号的衰减主要是由于频率的升高导致了介质损耗和导体损耗的增加。下图所示为一段传输线的损耗: 当信号的速率非常大的时候,信号在接收端就很可能发生畸变失真。为了在一定 ...
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