Nonparametric mobile speed estimation in fading channels: Performance analysis and experimental results

Hong Zhang, Ali Abdi

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


In this paper we propose a new speed estimation technique, applicable to both mobile and base stations, based on the characteristics in the power spectrum of mobile fading channels. Our analytic performance analysis, verified by Monte Carlo simulations, shows that our low-complexity estimator is not only robust to both Gaussian and non-Gaussian noises, but also insensitive to nonisotropic scattering observed at the mobile. The estimator performs very well in both two- and three-dimensional propagation environments. The robustness against both nonisotropic scattering and line of sight can be further increased, by taking advantage of resolvable paths in wideband fading channels, due to the differences among the Doppler spectra observed at different paths. We also extend this technique to base stations with antenna arrays. By exploiting the spatial information, the proposed space-time estimator exhibits excellent performance over a wide range of noise power, nonisotropic scattering, and line-of-sight component, verified by simulation. The utility of the new method is further demonstrated by applying it to the measured data.

Original languageEnglish (US)
Article number4907441
Pages (from-to)1683-1692
Number of pages10
JournalIEEE Transactions on Wireless Communications
Issue number4
StatePublished - Apr 2009

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


  • Correlation
  • Doppler estimation
  • Doppler spectrum
  • Fading channels
  • Macrocell
  • Multipath channels
  • Multiple antennas
  • Velocity estimation


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