1-5GHz直接数字射频调制器与嵌入式时间逼近滤波器实现-43dB EVM在1024 QAM

2019 Symposium on VLSI Circuits Pub Date : 2019-06-09 DOI:10.23919/VLSIC.2019.8778115

Shiyu Su, M. Chen

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引用次数: 4

摘要

本文提出了一种1-5GHz直接数字射频调制器，该调制器采用嵌入式时间逼近滤波器(TAF)来抑制带外底噪声。提出的TAF技术通过调制的LO波形在时域上近似FIR脉冲响应，从而在频率上转换过程中产生等效的RF带通滤波。在2.4GHz的10MHz 1024 QAM信号中，硅原型实现了- 43dB EVM，峰值阻带噪声抑制> 50 dB。

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A 1–5GHz Direct-Digital RF Modulator with an Embedded Time-Approximation Filter Achieving -43dB EVM at 1024 QAM

This paper presents a 1–5GHz direct-digital RF modulator with an embedded time-approximation filter (TAF) to suppress out-of-band noise floor. The proposed TAF technique approximates a FIR impulse response in time domain via a modulated LO waveform, leading to an equivalent RF bandpass filtering during the frequency up-conversion process. The silicon prototype achieves - 43dB EVM for a 10MHz 1024 QAM signal at 2.4GHz with peak stopband noise rejection of > 50 dB.

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2019 Symposium on VLSI Circuits

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