多值数据的自适应脉冲宽度调制预加重方法

A method of adaptive pulse width modulation for multiple-valued data transmission

信号受长距离同轴电缆的趋肤效应、介电损耗等因素的影响,高频衰减严重,产生码间干扰,使接收端很难恢复信号,限制信号传输速度.脉冲宽度调制(PWM)预加重技术,是通过时域信息处理来增加信号的传输速度,在二进制信号中已经得到很好运用.自适应PWM预加重方法则是进一步针对数据相关性抖动,对不同数据序列进行或强或弱的预加重,动态补偿多进制数据的传输损耗,提高信号完整性,眼图结果表明该方法改善了信号传输质量.

The non-ideal characteristics such as dielectric loss and skin effect of coaxial cables etc can cause attenuation of the high-frequency component of the signals, making it difficult for the receiver to interpret the signal, thereby greatly reducing the data rate. Pulse width modulation （PWM） pre-emphasis technique, which has been very good to use in the binary signal, utilizes time-domain information processing to increase the data rate. We introduce the new adaptive PWM pre-emphasis method to further eliminate the data-dependent jitter, which can dynamically compensate for the transmission loss of multiple-valued data with strong or weak pre-emphasis. The results of eye diagrams show that this method can improve the quality of signal transmission.