Two or more binary sequences are called as a set of odd-periodic complementary binary sequences (OPCS) if the sum of their respective odd-periodic autocorrelation function is a delta function.

• 如果两个以上二元序列的奇周期自相关函数之和是一个冲击函数,这些序列称为奇周期二元互补序列集(简记为OPCS)。