Abstract
A new method for the direction of arrival (DOA) estimation of wideband linear frequency modulated (LFM) sources in sensor arrays based on fractional Fourier transform and fractional Fourier domain signal subspace decomposition is presented. The proposed approach first separates LFM sources in fractional Fourier domain using the energy-concentrated property of LFM signal in the fractional Fourier domain, and constructs the fractional Fourier domain correlation matrix of the sensor array sources. Through estimating the signal and noise subspaces with the eigen-decomposition of the correlation matrix, the MUSIC algorithm is used to estimate the DOAs of LFM sources. Computer simulation verified the effectiveness of the new method.
| Original language | English |
|---|---|
| Pages (from-to) | 895-899 |
| Number of pages | 5 |
| Journal | Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology |
| Volume | 25 |
| Issue number | 10 |
| Publication status | Published - Oct 2005 |
Keywords
- DOA estimation
- Fractional Fourier transform
- LFM signal
- MUSIC algorithm