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

Table 4

Computation complexity comparison of the CRT and frequency-band division.

Method	MULT.	DIV.	Mod.	Round.	ADD.	ABS.	Search numbers
Robust CRT [16]	205	205	0	0	236	0	63
Closed-form CRT [21]	8	6	4	2	5	0	0
Frequency-band division	0	0	0	0	108	54	18

Mod. represents a modular operation, Round. represents rounding integer operation, and ABS. represents absolute value operation.