The Line Spectral Frequency Model of a Finite-Length Sequence
Data(s) |
01/06/2010
|
---|---|
Resumo |
The line spectral frequency (LSF) of a causal finite length sequence is a frequency at which the spectrum of the sequence annihilates or the magnitude spectrum has a spectral null. A causal finite-length sequencewith (L + 1) samples having exactly L-LSFs, is referred as an Annihilating (AH) sequence. Using some spectral properties of finite-length sequences, and some model parameters, we develop spectral decomposition structures, which are used to translate any finite-length sequence to an equivalent set of AH-sequences defined by LSFs and some complex constants. This alternate representation format of any finite-length sequence is referred as its LSF-Model. For a finite-length sequence, one can obtain multiple LSF-Models by varying the model parameters. The LSF-Model, in time domain can be used to synthesize any arbitrary causal finite-length sequence in terms of its characteristic AH-sequences. In the frequency domain, the LSF-Model can be used to obtain the spectral samples of the sequence as a linear combination of spectra of its characteristic AH-sequences. We also summarize the utility of the LSF-Model in practical discrete signal processing systems. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/28294/1/line.pdf Yedlapalli, Satya Sudhakar and Hari, KVS (2010) The Line Spectral Frequency Model of a Finite-Length Sequence. In: Selected Topics in Signal Processing, IEEE Journal of, 4 (3). pp. 646-658. |
Publicador |
IEEE |
Relação |
http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5447678&sourceID=ISI&tag=1 http://eprints.iisc.ernet.in/28294/ |
Palavras-Chave | #Electrical Communication Engineering |
Tipo |
Journal Article PeerReviewed |