Inter symbol interference cancellation for a mobile cellular receiver using lower and higher order statistics

Author

Morns, Ian ; Sali, Sadettin

Author_Institution

Dept. of Electr. & Electron. Eng., Newcastle upon Tyne Univ., UK

fYear

1999

fDate

1999

Firstpage

8

Lastpage

11

Abstract

A code division multiple access (CDMA) signal which is subjected to multipath and other causes of intersymbol interference (ISI) must function in a low SNR environment by virtue of being a spread spectrum signal. In such an environment conventional ISI cancellation techniques, such as least mean square (LMS) equalisation, will not operate satisfactorily. Therefore an equalisation scheme which is insensitive to extremely high levels of Gaussian noise must be developed. In this paper such a scheme which employs both second-order and higher order statistics and exploits the characteristics of CDMA channels has been developed. The algorithm is effective against both mean square error (MSE) and ISI as it employs a cost function which includes both second-order and 4th-order cumulant terms

Keywords

Gaussian noise; cellular radio; code division multiple access; equalisers; higher order statistics; interference suppression; intersymbol interference; multipath channels; radio receivers; spread spectrum communication; 4th-order cumulant; CDMA channels; CDMA signal; Gaussian noise; ISI; MSE; SNR; code division multiple access; cost function; equalisation scheme; higher order statistics; interference cancellation; intersymbol interference; mean square error; mobile cellular receiver; multipath interference; second-order statistics; spread spectrum signal; Cost function; Gaussian noise; Higher order statistics; Interference cancellation; Intersymbol interference; Least squares approximation; Mean square error methods; Multiaccess communication; Signal to noise ratio; Spread spectrum communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Higher-Order Statistics, 1999. Proceedings of the IEEE Signal Processing Workshop on

Conference_Location

Caesarea

Print_ISBN

0-7695-0140-0

Type

conf

DOI

10.1109/HOST.1999.778681

Filename

778681