A Method For Fine Resolution Frequency Estimation From Three DFT Samples
IEEE SIGNAL PROCESSING LETTERS, cilt.18, sa.6, ss.351-354, 2011 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 18 Sayı: 6
- Basım Tarihi: 2011
- Doi Numarası: 10.1109/lsp.2011.2136378
- Dergi Adı: IEEE SIGNAL PROCESSING LETTERS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.351-354
- Anahtar Kelimeler: Frequency estimation, fine doppler estimation, radar signal processing, DFT, PARAMETERS
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
The parameter estimation of a complex exponential waveform observed under white noise is typically tackled in two stages. In the first stage, a coarse frequency estimate is found by the application of an N-point DFT to the input of length N. In the second stage, a fine search around the peak determined in the first stage is conducted. The method proposed in this paper presents a simpler alternative. The method suggests a nonlinear relation involving three DFT samples already calculated in the first stage to produce a real valued, fine resolution frequency estimate. The estimator approaches Jacobsen's estimator for large N and presents a bias correction which is especially important for small and medium values of N.