Improving the Quantization Precision by Repeated Observation

王飞雪; 郁文贤; 郭桂蓉

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Improving the Quantization Precision by Repeated Observation

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- Improving the Quantization Precision by Repeated Observation
- Acta Electronica Sinica Issue 3, Pages: 116-118(1999)
- 作者机构：
  
  1. 国防科技大学自动目标识别重点实验室!长沙
  2. 410073
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN79
- Published：1999
- 稿件说明：
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[1]王飞雪,郁文贤,郭桂蓉.重复观测提高量化精度方法的研究[J].电子学报,1999(03):116-118.

王飞雪, 郁文贤, 郭桂蓉. Improving the Quantization Precision by Repeated Observation[J]. Acta Electronica Sinica, 1999, (3): 116-118.
[1]王飞雪,郁文贤,郭桂蓉.重复观测提高量化精度方法的研究[J].电子学报,1999(03):116-118. DOI：

王飞雪, 郁文贤, 郭桂蓉. Improving the Quantization Precision by Repeated Observation[J]. Acta Electronica Sinica, 1999, (3): 116-118. DOI：

摘要

模数转换的精度在很大程度上取决于模数转换器的位数通过在量化前使被量化信号叠加上适当分布的噪声并对量化值作多次取样平均，有可能提高量化精度．本文通过严格的数学分析，给出了估计无偏的条件以及为满足给定量化精度所需的最少积累次数最后对采用正态分布和均匀分布噪声作为叠加噪声的情形进行了具体的分析和比较.

Abstract

The quantization precision is determined by the word-length of analog-to-digital converters. But by adding noise to the signal before quantization and averaging a set of quantization results

the quantization error can be reduced. A strictly mathematical analysis is given in this paper. The conditions for unbiased estimation and the minimum sampling number needed in averaging in order to reach a given quantization precision are given. Particularly

the performances using Gaussian noise and uniform distribution noise as the additional noise are analyzed and compared in detail.

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