EURASIP Journal on Advances in Signal Processing

Table 2 Complexity comparison of the suggested DFT-based cell ID estimator with [12–14], in a number of complex multiplications

From: DFT-based low-complexity optimal cell ID estimation in NB-IoT

	Cell ID	Channel
Exhaustive ML [12]	266112	N/A
[13]	66528	N/A
[14]	16632	N/A
Suggested ML	<73856⁽¹⁾	4032

Notes: (1) This value is a loose upper bound of the achievable complexity. Such as aforementioned, this could be reduced by 8, namely 9232

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