UWB real-time spectrum measurement based on microwave photonics

Abstract

Concerning future ultra wideband(UWB) real-time measurement of electromagnetic spectrum demand in electromagnetic battlefield, this paper proposes a frequency-time mapping measurement method based on microwave photonics. Frequency-time mapping, or real-time Fourier transform, maps the input ultra-wideband electromagnetic spectrum information to the output time-domain waveform. The electromagnetic spectrum signal is modulated to light by CS-SSB modulation, and frequency-time mapping is formed by using electrically modulated microring. Through simulation verification, the method can achieve frequency measurement of panoramic bandwidth signal from100MHz to 30GHz.The frequency resolution can reach 80 MHZ, whose scanning time is less than 20us.The method can achieve ultra-high speed, high-precision, broadband measurement of wideband complex electromagnetic spectrum situation, providing technical support for future electromagnetic spectrum operations.

Adaptive communication anti-jamming technology based on microwave photonic

“…It can recognize dot frequency, frequency hopping signal, linear frequency modulation signal and a combination of signals to get spectrum sensing results [5]. Microwave photonic hopping signal generation mainly includes dual optical frequency comb locking technology [6], femtosecond mode-locked laser phase locking technology [7], semiconductor laser injection locking technology [8] and photoelectric oscillator (OEO) based phase locking technology [9]. In this paper, a method of frequency conversion using coherent optical comb is proposed, which can achieve high frequency hopping speed of over 20000 hops/s and 2-18GHz frequency hopping bandwidth.…”