A high performance fast-Fourier-transform spectrum analyzer for measuring spin noise spectrums
收藏中国科学院中国科学技术大学科学数据中心2026-01-10 收录
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资源简介：
A high performance fast-Fourier-transform (FFT) spectrum analyzer, which is developed for measure spin noise
spectrums, is presented in this paper. The analyzer is implemented with a field-programmable-gate-arrays (FPGA) chip for
data and command management. An analog-to-digital-convertor chip is integrated for analog signal acquisition. In order to
meet the various requirements of measuring different types of spin noise spectrums, multiple operating modes are designed
and realized using the reprogrammable FPGA logic resources. The FFT function is fully managed by the programmable
resource inside the FPGA chip. A 1 GSa/s sampling rate and a 100 percent data coverage ratio with non-dead-time are
obtained. 30534 FFT spectrums can be acquired per second, and the spectrums can be on-board accumulated and averaged.
Digital filters, multi-stage reconfigurable data reconstruction modules, and frequency down conversion modules are also
implemented in the FPGA to provide flexible real-time data processing capacity, thus the noise floor and signals aliasing can
be suppressed effectively. An efficiency comparison between the FPGA-based FFT spectrum analyzer and the softwarebased FFT is demonstrated, and the high performance FFT spectrum analyzer has a significant advantage in obtaining high
resolution spin noise spectrums with enhanced efficiency
提供机构：
中国科学技术大学物理学院
创建时间：
2023-05-22
