Fig. 1. Principle of MSK modulation

Fig. 2. Principle of OFDM-MSK-LFM modulation and demodulation

Fig. 3. Principle of PTS algorithm

Fig. 4. Block diagram of optically THz integrated system

Fig. 5. Principle of 2D-FFT sensing algorithm

Fig. 6. Partial simulation results. (a) Integrated signal time-domain waveform; (b) integrated signal spectrum; (c) I/Q modulator output spectrum; (d) coupler output spectrum

Fig. 7. Fuzzy function diagrams of OFDM-LFM. (a) Three-dimensional fuzzy function diagram; (b) contour map of fuzzy function; (c) delay section; (d) frequency shift section

Fig. 8. Fuzzy function diagrams of OFDM-MSK-LFM signal. (a) Three-dimensional fuzzy function diagram; (b) contour map of fuzzy function; (c) delay section; (d) frequency shift section

Fig. 9. Comparison of PSLR for different LFM bandwidths. (a) 1 GHz LFM; (b) 2 GHz LFM; (c) 3 GHz LFM; (d) 4 GHz LFM

Fig. 10. Results of short-range static dual-target ranging. (a) Target spacing is 5 cm; (b) target spacing is 2 cm

Fig. 11. Results of dynamic dual-target ranging and velocity measurement. (a) Range section; (b) velocity section

Fig. 12. Comparison of sensing performance. (a) Comparison of maximum detectable range and velocity resolution for different NFFT; (b) velocity sensing results of different signals when NFFT is 1024

Fig. 13. Bit error rate (BER) curves of integrated signal. (a) Signal-to-noise ratio (SNR) and BER curves in AWGN superimposed multipath channels; (b) BER varying with PD input power at different baud rates; (c) BER varying with PD input power at different LFM bandwidths; (d) BER varying with PD input power at different values of rising cosine roll down coefficient (α)

Fig. 14. PAPR-CCDF curves. (a) PAPR-CCDF curves for different NFFTs; (b) PAPR-CCDF curves of PTS algorithm for different number (V) of carrier segmentation blocks

Fig. 15. Comparison of PAPR suppression algorithms. (a) PAPR-CCDF curves of different algorithms; (b) BER curves of different algorithms

Fig. 16. Doppler interference coefficient curves

Fig. 17. Boundary analysis of communication and sensing performance. (a) Relationship between ratio of communication and sensing widths and communication and sensing resolutions in TDM/FDM scheme; (b) relationship among maximum measurement error, CCDF, and NFFT