A new class of spreading sequences

Author

Tirke, Z. ; Hall, T.E. ; Osborne, C.F.

Author_Institution

Scientific Technol., E. Brighton, Australia

Volume

1

fYear

1998

fDate

2-4 Sep 1998

Firstpage

46

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ISSSTA.1998.726193

Filename

726193