采用数字锁相合成器的77 ghz FMCW雷达

C. Wagner, R. Feger, A. Haderer, A. Fischer, A. Stelzer, H. Jager
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引用次数: 4

摘要

介绍了一种适用于77 ghz调频连续波雷达的数字锁相合成器。它由数字鉴相器、数字环路滤波器、高通调制和VCO调谐特性的预失真组成。另一个特性是能够存储以前的相位误差,以便迭代适应环路滤波器系数和高通调制参数。建立了一个雷达系统,将所提出的数字合成器与实际雷达测量中基于偏移环路的合成器进行比较。
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A 77-GHz FMCW radar using a digital phase-locked synthesizer
A digital phase-locked synthesizer for application in a 77-GHz frequency modulated continuous wave (FMCW) radar is presented. It consists of a digital phase discriminator, a digital loop filter, highpass modulation, and predistortion of the VCO tuning characteristic. An additional feature is the ability to store the previous phase errors for iterative adaptation of the loop filter coefficients and the highpass modulation parameter. A radar system has been built to compare the proposed digital synthesizer to an offset-loop based one in actual radar measurements.
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