Characterization of wideband time-varying channels with multipath-scale diversity

Author

Jiang, Ye ; Papandreou-Suppappola, Antonia

Author_Institution

Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA

fYear

2003

fDate

28 Sept.-1 Oct. 2003

Firstpage

50

Lastpage

53

Abstract

In this paper, we present a characterization of wideband time-varying wireless channels based on a discrete time-scale framework that can provide multipath-scale diversity. This is important for systems such as underwater or airborne acoustics for which the narrowband conditions no longer hold, and time-scalings cannot be approximated by constant frequency shifts. We design a spreading waveform for direct-sequence code division multiple-access systems based on wavelet functions to realize orthogonal signaling. Furthermore, we use the orthogonal wavelet decomposition for direct channel estimation and coherent detection.

Keywords

channel estimation; code division multiple access; diversity reception; signal detection; spread spectrum communication; telecommunication signalling; time-varying channels; wavelet transforms; airborne acoustics; coherent detection; direct channel estimation; direct-sequence code division multiple-access system; discrete time-scale framework; multipath-scale diversity; orthogonal signaling; orthogonal wavelet decomposition; spreading waveform; underwater system; wavelet function; wideband time-varying channels; wireless channels; Acoustic applications; Acoustic propagation; Channel estimation; Frequency; Multiaccess communication; Narrowband; Signal design; Time-varying channels; Underwater acoustics; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Statistical Signal Processing, 2003 IEEE Workshop on

Print_ISBN

0-7803-7997-7

Type

conf

DOI

10.1109/SSP.2003.1289337

Filename

1289337