Digital Instantaneous Frequency Measurement of a Real Sinusoid Based on Three Sub-Nyquist Sampling Channels

Figure 3

Performance analysis for frequency deduction: (a) RMSE of versus input frequency with SNR = 20 dB; (b) RMSE of versus n with SNR = 20 dB and f_k = 50 MHz; (c) RMSE of versus sample SNR with f_k = 50 MHz; (d) RMS error of versus size of look-up-table with SNR = 20 dB, TLS L = 8, and f_k = 50 MHz.

(a)

(b)

(c)

(d)