Suppression of non-Gaussian narrowband interference in CDMA systems via an interior point based method

Author

Logothetis, Andrew ; Carlemalm, Catharina

Author_Institution

Div. of Autom. Control, R. Inst. of Technol., Stockholm, Sweden

fYear

1998

fDate

14-16 Sep 1998

Firstpage

108

Lastpage

111

Abstract

In this paper, we consider the problem of narrowband interference suppression in CDMA systems. The unknown narrowband interference is modeled as a non-Gaussian autoregressive process and the received spread spectrum signal is modeled as a finite-state Markov chain. We propose an iterative, off-line scheme based on the coordinate descent method. We estimate the spread spectrum sequence using the Viterbi algorithm, and then estimate the unknown narrowband interference using an interior point based scheme that minimizes the l₁ norm of the residuals. The procedure is repeated until convergence

Keywords

Markov processes; Viterbi decoding; autoregressive processes; code division multiple access; dynamic programming; interference suppression; spread spectrum communication; CDMA systems; Viterbi algorithm; coordinate descent method; dynamic programming; finite-state Markov chain; interior point based method; iterative off-line scheme; narrowband interference suppression; non-Gaussian autoregressive process; non-Gaussian narrowband interference; spread spectrum signal; unknown narrowband interference; Automatic control; Autoregressive processes; Interference suppression; Iterative methods; Multiaccess communication; Narrowband; Signal processing; Spread spectrum communication; Viterbi algorithm; White noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Statistical Signal and Array Processing, 1998. Proceedings., Ninth IEEE SP Workshop on

Conference_Location

Portland, OR

Print_ISBN

0-7803-5010-3

Type

conf

DOI

10.1109/SSAP.1998.739346

Filename

739346