Table 1.

The calculation burden between different algorithms.

Method Name	Multiplication/Times	Addition/Times
Proposed method	$10N{\log }_{2}N+10$	$7N{\log }_{2}N+7$
Unit correlation	$10N{\log }_{2}N+10$	$7N{\log }_{2}N+7$
ASPeCT/SCPC	$16N{\log }_{2}N+18$	$24N{\log }_{2}N+8$
BPSK-like	$12N{\log }_{2}N+6$	$18N{\log }_{2}N+2$