Abstract:

A new class of loose synchronous（LS）spreading codes with zero correlation window (ZCW) was presented. It was constructed by making Kronecker product of orthogonal matrix and ZCW complementary codes. This new LS code increases the number of perfect complementary pair, and extends ZCW within the same group. Moreover, both auto-correlation and cross-correlation of ZCW in the same group remain identical. The minimum ZCW among different groups is the same as that of basic LS codes. The method for constructing these new codes is presented and the ZCW properties are also verified. The number of these new codes is only smaller than theoretical upper bound by one.

Key words: loose synchronous spreading code, Kronecker product, zero correlation window