Complex Orthogonal Spreading Sequences using Mutually Orthogonal Complementary Sets
Ying Zhao, Jennifer Seberry, Beata Joanna Wysocki, Tadeusz Antoni Wysocki · 2006
This paper presents a new family of complex spreading sequences designed using mutually orthogonal(MO) complementary sets. Based on the technique described in this paper, the correlation properties of sets of sequences are compared to well-known Walsh-Hadamard sequence sets. Further improvement of correlation qualities can be achieved by employing a diagonal modification method. We also present simulation results of an asynchronous multiuser CDMA system using the modified sequences.