An adaptive direct-sequence spread-spectrum receiver for operation in fading channels with narrowband interference

Author

Iltis, R.A.

Author_Institution

Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA

fYear

1988

fDate

28 Nov-1 Dec 1988

Firstpage

535

Abstract

An adaptive version of the GLRT (general likelihood-ratio test) receiver is presented, where the recursive least-squares (RLS) algorithm provides the desired joint estimates. Bit-error rate results are presented for a direct-sequence receiver with differential detection as a function of the number of iterations of the RLS algorithm. It is shown that convergence is achieved within a time period of 3 to 10 bit durations, depending on the particular combination of multipath and interference present. The GLRT receiver considered uses differential phase-shift keying (DPSK)

Keywords

fading; least squares approximations; phase shift keying; radio receivers; radiofrequency interference; spread spectrum communication; telecommunication channels; BER; DPSK; RLS algorithm; adaptive direct-sequence spread-spectrum receiver; bit error rate; convergence; differential detection; differential phase-shift keying; fading channels; general likelihood-ratio test; iterations; joint estimates; narrowband interference; recursive least-squares; Bit error rate; Differential quadrature phase shift keying; Fading; Frequency; Interference; Narrowband; RAKE receivers; Resonance light scattering; Spread spectrum communication; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 1988, and Exhibition. 'Communications for the Information Age.' Conference Record, GLOBECOM '88., IEEE

Conference_Location

Hollywood, FL

Type

conf

DOI

10.1109/GLOCOM.1988.25898

Filename

25898