Direction-of-arrival, time delay and Doppler shift estimation in radar and communications array systems

bil.jpgThe problem of estimating the delays and doppler shifts from multiple reflections of moving targets is studied. Here, the transmitted signal waveform and the number of multipath reflections are assumed to be known.

This situation occurs, for instance, in radar applications when a known transmitted signal is reflected by moving targets as depicted in the figure above. By estimating the reflected signals time-delay and frequency offset, it is possible to estimate the position and velocity of the reflecting objects. In communication applications, the situation occurs when the transmitter is rapidly moving or has an unknown frequency offset. Here, the estimation of the delays and frequency offsets is necessary in establishing a clean, inter-symbol and interference-free communication link.

  1. Subspace-based estimation of time delays and Doppler shifts. Andreas Jakobsson, A. Lee Swindlehurst, and Peter Stoica. In volume 46, issue 9 of IEEE TRANSACTIONS ON SIGNAL PROCESSING, pp 2472-2483, 1998.
  2. Wideband relax and wideband clean for aeroacoustic imaging. Y. Wang, J. Li, Peter Stoica, M. Sheplak, and T. Nishida. In volume 115, issues 757-767 of J Acoust. Soc. of America, 2004.
  3. Array processing for signals with non-zero means in colored noise fields. Peter Stoica, M. Agrawal, and P. Åhgren. In volume 14 of Digital Signal Processing, pp 296-311, 2004.
  4. Constant-beamwidth and constant-powerwidth wideband robust capon beamformers for acoustic imaging. Z. Wang, J. li, Peter Stoica, T. Nishida, and M. Sheplak. In volume 116 of J Accoust. Soc. of America, pp 1621-1631, 2004.
  5. Extended derivations of MUSIC in the presence of steering vector errors. Peter Stoica, Z. Wang, and J. Li. In volume 53 of IEEE Trans Signal Process, pp 1209-1211, 2005.
  6. Adaptive imaging for forward-looking ground penetrating radar. Y. Wang, X. Li, J. Li, and Peter Stoica. In volume 41 of IEEE Transactions on Aerospace and Electronic Systems, pp 922-936, 2005.
  7. Novel multistatic adaptive microwave imaging methods for early breast cancer detection. Yao Xie, Bin Guo, Jian Li, and Peter Stoica. In Eurasip Journal on Applied Signal Processing, pp 1-13, 2006.
  8. Multistatic adaptive microwave imaging for early breast cancer detection. Yao Xie, Bin Guo, Luzhou Xu, Jian Li, and Peter Stoica. In volume 53, issue 8 of IEEE Trans Biomedical Eng, pp 1647-1657, 2006.
  9. Microwave imaging via adaptive beamforming methods for breast cancer detection. Bin Guo, Yanwei Wang, Jian Li, Peter Stoica, and Renbiao Wu. In volume 20 of J Electromagnetic Waves and Applications, pp 53-63, 2006.