PS-CDMA: spreading signals for CDMA designed in the frequency domain using perfect sequences

Author

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

Author_Institution

Dept. of Electr. Eng., Florence Univ., Italy

Volume

6

fYear

1998

fDate

1998

Firstpage

3420

Abstract

In this paper are described some new approaches to the definition of CDMA spreading functions. The simplest method increases the code space up to 50%. The most sophisticated one performs a very strong rejection to the delayed replicas of the interfering signals. Several advantages have also been found in the FFT implementation of PS-CDMA transmitters and receivers, the elimination of the analog matched filter being the most attractive one. Theoretical results have been supported by computer simulations, and comparisons with the traditional DS-CDMA design of spreading functions are also included

Keywords

cellular radio; code division multiple access; fast Fourier transforms; frequency-domain synthesis; interference suppression; radio receivers; radio transmitters; radiofrequency interference; spread spectrum communication; CDMA; FFT implementation; PS-CDMA; code space; delayed replicas; frequency domain; interfering signals; perfect sequences; receivers; rejection; spreading functions; spreading signals; transmitters; Autocorrelation; Delay; Frequency domain analysis; Information retrieval; Laboratories; Matched filters; Multiaccess communication; Shape; Signal design; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 1998. GLOBECOM 1998. The Bridge to Global Integration. IEEE

Conference_Location

Sydney,NSW

Print_ISBN

0-7803-4984-9

Type

conf

DOI

10.1109/GLOCOM.1998.775837

Filename

775837