Title :
A new class of spreading sequences
Author :
Tirke, Z. ; Hall, T.E. ; Osborne, C.F.
Author_Institution :
Scientific Technol., E. Brighton, Australia
Abstract :
This paper is concerned with the construction and analysis of a new class of spreading sequences. A known pseudonoise sequence and a selection of its cyclic shifts is folded into a new type of array and unfolded along its diagonal. The resulting sequence is equivalent to a decimation of a shuffled ensemble of cyclic shifts of the original pseudonoise sequence. The new sequences form a family comparable in size and figure of merit to that of Gold codes, but available in many different (composite) lengths. They possess enhanced immunity against cryptographic attack, owing to their large linear and nonlinear span. These sequences are well suited to CDMA, especially for microcell applications
Keywords :
binary sequences; cellular radio; code division multiple access; correlation methods; cryptography; pseudonoise codes; spread spectrum communication; CDMA; Gold codes; array; autocorrelation properties; binary sequences; cryptographic attack immunity; cyclic shifts; decimation; diagonal; figure of merit; linear span; microcell applications; nonlinear span; pseudonoise sequence; sequence folding; sequence lengths; sequence size; sequence unfolding; spreading sequences; Australia; Autocorrelation; Cryptography; Digital signal processing; Gold; Mathematics; Microcell networks; Multiaccess communication; Phased arrays; Physics;
Conference_Titel :
Spread Spectrum Techniques and Applications, 1998. Proceedings., 1998 IEEE 5th International Symposium on
Conference_Location :
Sun City
Print_ISBN :
0-7803-4281-X
DOI :
10.1109/ISSSTA.1998.726193
