中圖分類號： TN47
文獻標識碼： A
DOI：10.16157/j.issn.0258-7998.212124
中文引用格式： 郭靜，何鵬. 一種實時頻譜儀中幀檢波器的FPGA實現[J].電子技術應用，2021，47(12)：35-38.
英文引用格式： Guo Jing，He Peng. A realization of frame detector in real-time spectrum analyzer based on FPGA[J]. Application of Electronic Technique，2021，47(12)：35-38.

A realization of frame detector in real-time spectrum analyzer based on FPGA

Abstract： For coping with transmission and display problem caused by the huge amount of seamless spectrum data in real-time spectrum analyzer, this article designed a FIFO-based frame detector of real-time spectrum analyzer in FPGA. It combines multiple frames of spectrum data into one frame for transmission and refresh while retaining signal characteristics. By simulation and actual testing，results show that the detector has four types of detection: peak value, negative value, mean value and real-time sample value. It also can cut off the spectrum data outside the analysis bandwidth while detecting. Compared with the traditional RAM-based frame detector, the detector does not need to control RAM read and write addresses, is easy to implement, occupies less logic resources, and has been applied in real-time spectrum analyzers.

Key words : real-time spectrum analyzer；detector；frame detect；FPGA