DocumentCode :
431872
Title :
Time-scale canonical model for wideband system characterization
Author :
Jiang, Ye ; Papandreou-Suppappola, Antonia
Author_Institution :
Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA
Volume :
4
fYear :
2005
fDate :
18-23 March 2005
Abstract :
In this paper, we propose a time-scale canonical model as a discrete characterization of wideband linear time-varying systems. This representation decomposes a system output into discrete time shifts and Doppler scalings on the input, weighted by a smoothed discrete version of the wideband spreading function. We base this formulation on the Mellin transform that is matched to scalings. We also demonstrate that our proposed model inherently affords a joint multipath-scale diversity in wideband communication channels. By properly designing the signaling and reception schemes using wavelet techniques, we can achieve this diversity over a dyadic time-scale framework.
Keywords :
Fourier transforms; broadband networks; diversity reception; multipath channels; radio receivers; time-varying channels; Fourier transform; discrete Doppler scalings; discrete time shifts; dyadic time-scale canonical model; joint multipath-scale diversity; scaling matched Mellin transform; time-scale RAKE receiver; wideband communication channels; wideband linear time-varying systems; wideband spreading function; wideband system characterization; wireless wideband systems; Communication channels; Fading; Fourier transforms; Frequency diversity; Linear systems; Narrowband; Scattering; Signal design; Time varying systems; Wideband;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2005. Proceedings. (ICASSP '05). IEEE International Conference on
ISSN :
1520-6149
Print_ISBN :
0-7803-8874-7
Type :
conf
DOI :
10.1109/ICASSP.2005.1416000
Filename :
1416000
Link To Document :
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