Moeness G. Amin

Publications (2)0 Total impact

• Source

  Available from: hindawi.com

  Article: Localization and Tracking of Passive RFID Tags Based on Direction Estimation

  Zhang Yimin, Moeness G. Amin, Kaushik Shashank
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  ABSTRACT: Radio frequency identification (RFID) is poised for growth as businesses and governments explore applications implementing RFID. The RFID technology will continue to evolve to meet new demands for human and target location and tracking. In particular, there are increasing needs to locate and track multiple RFID-tagged items that are closely spaced. As a result, localization and tracking techniques with higher accuracy yet low implementation complexity are required. This paper examines the applicability of direction-of-arrival (DOA) estimation methods to the localization and tracking problems of passive RFID tags. Different scenarios of stationary and moving targets are considered. It is shown through performance analysis and simulation results that simple DOA estimation methods can be used to provide satisfactory localization performance.
  International Journal of Antennas and Propagation. 01/2007;
• Source

  Available from: hindawi.com

  Article: Subband Array Implementations for Space-Time Adaptive Processing

  Zhang Yimin, Yang Kehu, Moeness G. Amin
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  ABSTRACT: Intersymbol interference (ISI) and cochannel interference (CCI) are two primary sources of signal impairment in mobile communications. In order to suppress both ISI and CCI, space-time adaptive processing (STAP) has been shown to be effective in performing spatio-temporal equalization, leading to increased communication capacity as well as improved quality of service. The high complexity and slow convergence, however, often impede practical STAP implementations. Several subband array structures have been proposed as alternatives to STAP. These structures provide optimal or suboptimal steady-state performance with reduced implementation complexity and improved convergence performance. The purpose of this paper is to investigate the steady-state performance of subband arrays with centralized and localized feedback schemes, using different decimation rates. Analytical expressions of the minimum mean-square error (MMSE) performance are derived. The analysis assumes discrete Fourier transform (DFT)-based subband arrays and considers both unconstrained and constrained weight adaptations.
  EURASIP Journal on Advances in Signal Processing. 01/2005;