Passive Fetal Movement Signal Detection System Based on Intelligent Sensing Technology

Algorithm 1

Preprocessing of FM signals.

	Input: a raw FM signal xi, , state error covariance moment Q, and observation error covariance moment R.
	Output: optimal filtrated output , .
	Initialise ; .
	Perform the Kalman filtering algorithm used to calculate the optimal filtered output sequence S.
	for
	for
	;
	;
	;
	end for
	end for
	Get the optimal filtered output , .