用于超宽带通信的高阶n音σ - δ调制器分析

2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512) Pub Date : 2004-05-23 DOI:10.1109/ISCAS.2004.1328953

K. Chang, G. Sobelman, E. Saberinia, A. Tewfik

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引用次数: 2

摘要

我们考虑了在UWB-OFDM通信系统设计中应用的一类非过采样n音σ - δ调制器的性质。这种系统中存在的频谱间隙与这些调制器的噪声整形特性很好地匹配，并且它们的非过采样特性使它们适用于这些超宽带信号。给出了一阶、二阶和L/sup /-阶调制器的性能结果，并给出了这类系统可获得的超分辨率的一般表达式。

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Analysis of higher-order N-tone sigma-delta modulators for ultra wideband communications

We consider the properties of a class of non-oversampling N-tone sigma-delta modulators which have applications in the design of UWB-OFDM communications systems. The spectrum gaps that exist in such systems are well-matched to the noise shaping properties of these modulators and their non-oversampling nature makes them practical for use with these ultra wideband signals. Performance results for first-order, second-order and L/sup th/-order modulators are presented, and a general expression for the excess resolution that can be gained in such systems is obtained.

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来源期刊

2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512)

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