DOI: 10.1109/TMTT.2025.3606886   IEEEXplore: https://ieeexplore.ieee.org/document/11165472

Joint radar and spectrum-sensing system enabled by an advanced microwave photonic waveform editing method.

MM-wave with >20 GHz ultrawide bandwidths

An accumulation function of an arbitrary waveform, after passing through a specific dispersive medium, is defined and calculated. This accumulation function is used to design a corresponding binary sequence to edit the arbitrary radar waveform. After editing, the accumulation function of the edited waveform approximates that of a linearly frequency-modulated (LFM) waveform. The edited waveform can be compressed into a narrow pulse after passing through the dispersive medium, providing the frequency-to-time mapping (FTTM) to achieve frequency measurement or time–frequency analysis. The binary sequence can be generated by a signal generator equipped with a 1-bit digital-to-analog converter (DAC), which is much less costly compared to directly generating a linear frequency-modulated signal for spectrum sensing.

Future radar application platforms from single radar functionality to integrated multifunctional systems with self-adaptive capabilities, with the capacity to understand their surrounding spectrum environment to enhance antijamming ability and survivability.

36.8 GHz ultra-wide bandwidth with 2 ns temporal resolution and 0.86 GHz frequency resolution with a variety of arbitrary waveforms.