A class of zero-padded spreading sequences for MAI cancellation in DS-CDMA systems
Jaesang Cha, Shulin Song, S.Y. Lee, Mun Geon Kyeong, Ken Tsubouchi · 2002
We introduce the generation method of the 2- and 4-phase preferred pairs (PPs) with ZCD (zero correlation duration) of (0.5N+1) for a period N. Then, the novel 3- and 5-phase PP that have enlarged ZCD of (0.75N+1) are constructed by using the selected zero padding method to the 2-and 4-phase PP. Using the chip-shift operation, the 3- and 5-phase ZCD sequences that have superior family size to the 2-and 4-phase ZCD sequences are derived.