Abstract:

A novel multi-subset complementary set with large set size and good correlation properties suitable for multicellular code division multiple access (CDMA) systems is constructed. Based on cyclic shifted perfect code sets and traditional mutually orthogonal complementary sets, the designed set can obtain multiple subsets, and the number of complementary codes in each subset comes up to theoretical bounds. The intra-subset  complementary codes have ideal correlation properties and the inter-subset complementary codes have approximately ideal correlation properties. When different subsets are assigned to different cells of multicellular CDMA systems, the requirements to accommodate more users can be satisfied and the intra-cell and inter-cell interference can be efficiently resisted.