A class of bandlimited complex spreading sequences with analytic properties
M.P. Lötter, Louis P. Linde · 2002
This paper describes the construction and correlation properties of a new class of analytic, bandlimited complex (ABC) spreading sequences. The sequences are loosely based on the well known Frank-Zadoff-Chu (FZC) sequences and are constructed by placing some constraints on the phases of the FZC sequences. The new class of spreading sequences are shown to have analytical properties, while retaining reasonable correlation properties. In particular, the analytic properties of the sequences facilitate the use of spreading sequences with double the length in CDMA systems. Furthermore, the sequences have a constant signal envelope making them ideal for applications were a peak-to-mean signal power ratio of one is desirable.