Fast phase sequences spreading codes for CDMA using FFT

Author

Del Re, E. ; Fantacci, R. ; Ronga, L.S.

Author_Institution

Dept. of Electron. Eng., Univ. di Firenze, Florence, Italy

fYear

1998

fDate

8-11 Sept. 1998

Firstpage

1

Lastpage

5

Abstract

In multi-path environments, Spread Spectrum multiple access techniques offer attractive properties of rejection of undesired signals and an high spectral efficiency. In this paper is presented a design method for spreading codes which employs Perfect Sequences, a class of complex sequences with singular correlation properties. The main advantage from the use of Perfect Sequences is the oppportunity of a fast DSP implementation with FFT blocks, where the analog section is extremely contained. Simulations in a multipath enviroment confirm the useful caracteristics of the proposed receiver for asyncronous trasmissions.

Keywords

code division multiple access; codes; fast Fourier transforms; radio receivers; spread spectrum communication; CDMA; FFT blocks; asyncronous trasmissions; design method; fast DSP implementation; fast phase sequences spreading codes; multipath environments; perfect sequences; receivers; spread spectrum multiple access techniques; Clocks; Correlation; Decorrelation; Multiaccess communication; Noise measurement; Receivers; Silicon;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Conference (EUSIPCO 1998), 9th European

Conference_Location

Rhodes

Print_ISBN

978-960-7620-06-4

Type

conf

Filename

7089942