DocumentCode :
3007069
Title :
High-resolution spectral estimation: Rethinking the Fourier transform
Author :
Griffiths, L.
Author_Institution :
University of Southern California, Los Angeles, CA
Volume :
11
fYear :
1986
fDate :
31503
Firstpage :
169
Lastpage :
172
Abstract :
This paper describes a novel data multiplication window for use with the Fourier Transform. The window is complex and consists of a linear FM chirp which spans the range 0 to 2π. The range of applications described is restricted to data sequences consisting of complex values, such as are observed at the outputs of in-phase and quadrature demodulation receivers used in antenna array applications and in communication systems. For the case of an input consisting of a single complex sinusoid, the new window produces an extremely sharp null located exactly at the frequency of the input sinusoid. As such, it has resolution properties far superior to those available via more conventional windowing techniques such as the raised cosine. Applications of the method to inputs containing multiple sinusoids and single, frequency modulated sinusoids are discussed.
Keywords :
Antenna arrays; Chirp; Contracts; Data mining; Demodulation; Fourier transforms; Frequency modulation; Noise shaping; Receiving antennas; Shape;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '86.
Type :
conf
DOI :
10.1109/ICASSP.1986.1169102
Filename :
1169102
Link To Document :
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