Fig. 1. Typical structure of a parallel microwave photonic de-chirp receiver, in which components circled by dashed lines can be shared with a signal generation module in a microwave photonic radar

Fig. 2. Typical structure of a serial microwave photonic de-chirp receiver, in which components circled by dashed lines can be shared with signal generation module in a microwave photonic radar

Fig. 3. Schematic diagram of microwave photonic de-chirp receiver for analysis^[9]

Fig. 4. Results of Monte-Carlo simulations of difference between gain for noise and gain for signal in microwave photonic de-chirp receiver (Power spectrum of receiver output signal is illustrated as inset, in which bandwidth of radar echo is 2 GHz)

Fig. 5. Performance of microwave photonic de-chirp receiver with different half wave voltages. (a) Gain and output 1-dB compression point; (b) noise figure

Fig. 6. Performance of microwave photonic de-chirp receiver with different optical powers. (a) Gain and output 1-dB compression point; (b) noise figure

Fig. 7. Performance of microwave photonic de-chirp receiver with electrical pre-amplification, in which multiple values of optical power $P_{\mathrm{O}}$ and amplifier gain $G_{\mathrm{E}}$ are taken (Noise bandwidth is 10 kHz which corresponds to a time duration of 100 μs). (a), (b), (c) Noise figure and sensitivity; (d), (e), (f) dynamic range. Values of $V_{\mathrm{\pi }}$ are (a), (d) 1.5 V, (b), (e) 3 V, and (c), (f) 6 V,respectively

Fig. 8. Performance of microwave photonic de-chirp receiver with electrical pre-amplification, in which multiple values of half wave voltage $V_{\mathrm{\pi }}$ and amplifier gain $G_{\mathrm{E}}$ are taken (Noise bandwidth is 10 kHz which corresponds to a time duration of 100 μs, and optical power $P_{\mathrm{O}}$ is 10 dBm). (a) Noise figure and sensitivity; (b) dynamic range

Fig. 9. Relationship between input linear processing region and gain of electrical amplifier in microwave photonic de-chirp receiver with electrical pre-amplification

Table 1. Commonly used modulation formats in microwave photonic de-chirp receivers and corresponding coefficients