Memory optimization techniques for UMTS code generation

This paper presents a novel architecture for pseudo-noise (PN) sequences generation. We briefly review some theoretic aspects of the finite field arithmetic applied to the PN sequences generation, showing the most commonly used generator structures, and developing some techniques aimed at reducing the generators´ memory requirements. The proposed architecture, developed for the downlink UMTS-FDD mode, exhibits a considerable memory reduction as well as a limited hardware complexity if compared with a conventional generator, and hence is well fit for the Mobile Station (MS) integration.