Digital Cancellation of Harmonic and Intermodulation Distortion in Wideband SAW-Less Receivers
Digital Cancellation of Harmonic and Intermodulation Distortion in Wideband SAW-Less Receivers
复制标题
宽带无 SAW 接收机中谐波和互调失真的数字消除
DOI：
10.1109/tcsii.2017.2761887
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
W. Namgoong
中科院分区：
文献类型：
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作者：
Esmail Babakrpur;W. Namgoong
本文介绍了一种数字失真均衡器，它可以补偿宽带声表面波（SAW）接收机中谐波混频和互调产物的影响。一个数学框架推导出用于分析信号失真的谐波和带外干扰的存在。该框架对$<inline-formula><tex-math notation="LaTeX">{K}</tex-math></inline-formula>$路径无SAW<inline-formula><tex-math notation="LaTeX">${M}$</tex-math></inline-formula>相位接收机进行建模，该接收机提供足够的前端观测以消除失真产物。一个自适应最小均方误差（MMSE）数字均衡器被用来估计失真产品的存在下的期望信号。MMSE均衡器共同考虑两个路径的失真产物以及相关噪声。采用130 nm CMOS工艺制作的双路四相接收机验证了失真补偿方案的有效性。
This brief presents a digital distortion equalizer that compensates for the effects of both the harmonic mixing and intermodulation products in wideband surface acoustic wave (SAW)-less receivers. A mathematical framework is derived for analyzing signal distortion in the presence of harmonic and out-of-band interferers. This framework models a <inline-formula> <tex-math notation="LaTeX">${K}$ </tex-math></inline-formula>-path SAW-less <inline-formula> <tex-math notation="LaTeX">${M}$ </tex-math></inline-formula>-phase receiver, which provides sufficient front-end observations to cancel the distortion products. An adaptive minimum mean-squared error (MMSE) digital equalizer is employed to estimate the desired signal in the presence of distortion products. The MMSE equalizer jointly accounts for distortion products as well as correlated noise of the two paths. A dual-path 4-phase receiver fabricated in 130 nm CMOS process has been used to validate the distortion compensation scheme.