Effects of phase-locked loop bandwidth on error vector magnitude in transmitter

M.-H. Chen Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Shanghai, 200050, China; Graduate University of the Chinese Academy of Sciences, Beijing, 100049, ChinaCorrespondence[email protected]

K.-W. Han Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Shanghai, 200050, China; Graduate University of the Chinese Academy of Sciences, Beijing, 100049, China

M.-H. Yang Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Shanghai, 200050, China

X.-W. Sun Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Shanghai, 200050, China

Abstract

The error vector magnitude (EVM) is extensively applied as a measure of transmitters’ performance. In this paper, the effect of phase-locked loop (PLL) bandwidth on EVM is examined. The relationship between EVM and PLL based local oscillator phase noise is analyzed, and a simplified expression is used to evaluate the EVM. Dependence of EVM on loop bandwidth is investigated. Analytical and experimental results show that choosing the optimal loop bandwidth of PLL would minimize the EVM of transmitter.

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Effects of phase-locked loop bandwidth on error vector magnitude in transmitter

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Effects of phase-locked loop bandwidth on error vector magnitude in transmitter

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