Walsh-chirp sequences for wireless applications
Beata Joanna Wysocki, Tadeusz Antoni Wysocki, Hans‐Jürgen Zepernick · Journal of Telecommunications and Information Technology · 2001
This paper deals with a new method to design polyphase spreading sequences for DS CDMA wireless applications. The method is based on weighting symbols of the orthogonal Walsh sequences by the complex factors being symbols of baseband chirp sequences. The resulting sequences possess good aperiodic correlation properties, while maintaining the orthogonality. Because of the parametric design, the sequences can be optimized to achieve desired characteristics.