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Analysis and Research of Dithering Effects on ADC Quantization Noise
Author(s): 
Pages: 121-125
Year: Issue:  13
Journal: Video Engineering

Keyword:  ADCnonlinear characteristicsditheringquantization noiseuniform distribution;
Abstract: 针对模数转换器ADC中抖动Dithering对量化噪声的影响问题,对3种典型分布的抖动信号进行了理论分析研究,并通过系统模型直接验证输出波形.理论分析及实验结果表明只要加入的Dithering信号能够降低量化噪声对输入信号的依赖关系,并且Dithering信号的特征函数在一定条件下能够为零,则Dithering信号就能有效地改善ADC的非线性特性,在一定程度上减少量化噪声对系统性能的影响,其中均匀分布的Dithering信号可以明显改善ADC的性能,从而也印证了上述分析和结论.
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