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多值数据的自适应脉冲宽度调制预加重方法?
A metho d of adaptive pulse width mo dulation for multiple-valued data transmission
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摘要: 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。Abstract: 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 di?cult 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.
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