Direction-of-arrival estimation for constant modulus signals
- 1 January 1999
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Signal Processing
- Vol. 47 (11) , 3125-3129
- https://doi.org/10.1109/78.796446
Abstract
In many cases where direction finding is of interest, the signals impinging on an antenna array are known to be phase modulated and, hence, to have a constant modulus (CM). This is a strong property; by itself, it is already sufficient for source separation and can be used to construct improved direction finding algorithms. We first derive the relevant Cramer-Rao bounds (CRBs) for arbitrary array configurations and specialize to uniform linear arrays. We then propose a simple suboptimal direction estimation algorithm in which the signals are separated using the CM property followed by direction finding on the decoupled signals. Compared with the ESPRIT algorithm and the CRB for arbitrary signals, the algorithm shows good resultsKeywords
This publication has 13 references indexed in Scilit:
- An analytical constant modulus algorithmIEEE Transactions on Signal Processing, 1996
- The constant modulus array for cochannel signal copy and direction findingIEEE Transactions on Signal Processing, 1996
- Cochannel signal recovery using the MUSIC algorithm and the constant modulus arrayIEEE Signal Processing Letters, 1995
- Computationally efficient angle estimation for signals with known waveformsIEEE Transactions on Signal Processing, 1995
- Direction-of-arrival estimation via exploitation of cyclostationary-a combination of temporal and spatial processingIEEE Transactions on Signal Processing, 1992
- Sensor array processing based on subspace fittingIEEE Transactions on Signal Processing, 1991
- Maximum likelihood methods for direction-of-arrival estimationIEEE Transactions on Acoustics, Speech, and Signal Processing, 1990
- On unique localization of multiple sources by passive sensor arraysIEEE Transactions on Acoustics, Speech, and Signal Processing, 1989
- MUSIC, maximum likelihood, and Cramer-Rao boundIEEE Transactions on Acoustics, Speech, and Signal Processing, 1989
- Maximum likelihood localization of multiple sources by alternating projectionIEEE Transactions on Acoustics, Speech, and Signal Processing, 1988