差分直扩程序，直扩的基础上加了差分编码。(The difference direct spread program is based on direct expansion with differential encoding.)

差分能量检测直扩程序，直扩的基础上加了差分编码和能量检测，而不是相关检测。(Differential energy detection DSSS, based on DSSS, adds differential encoding and energy detection instead of correlation detection.)