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

Table 2

Implementation results for FFT and frequency deduction algorithms.

SNR (dB)	L	Comparison between FFT and frequency deduction
		FFT			Frequency deduction
		N_FFT	RMSE (MHz)	Latency (ns)	X	RMSE (MHz)	Latency (ns)
10	8	1024	15.773	10790	4	10.239	105
		2048	15.735	21080	8	8.477	125
	16	1024	5.269	10795	4	6.831	110
		2048	5.181	21085	8	6.237	130
20	8	1024	9.500	10790	4	2.262	105
		2048	9.522	21080	8	1.670	125
	16	1024	3.161	10795	4	1.219	110
		2048	3.039	21085	8	0.967	130
30	8	1024	8.665	10790	4	0.676	105
		2048	8.689	21080	8	0.487	125
	16	1024	2.847	10795	4	0.339	110
		2048	2.739	21085	8	0.251	130