Title :
Performance evaluation of two-dimensional interpolations on OFDM channel estimation
Author :
Khanshan, Amir H. ; Amindavar, Hamidreza
Author_Institution :
Sci. & Res. Branch, Islamic Azad Univ. (IAU), Tehran
Abstract :
Two-dimensional (2D) interpolation techniques for pilot-symbol-aided (PSA) OFDM channel estimation are investigated. The best linear interpolator/filter in terms of minimizing mean square error (MSE) is 2D Wiener filter. However, there are other (non-linear) 2D interpolation techniques such as nearest neighborhood (NN), bilinear, bicubic and 2D cubic spline which are frequently used in other applications such as in image processing. We apply these interpolation techniques for OFDM channel estimation in fast fading wireless channels and compare their performances with two-dimensional Wiener filtering. The suitable distance of pilot points are considered. We have also compared the performance of system for different Doppler frequencies.
Keywords :
OFDM modulation; channel estimation; fading channels; interpolation; 2D interpolation technique; Wiener filter; fading wireless channel; mean square error; pilot-symbol-aided OFDM channel estimation; Channel estimation; Fading; Image processing; Interpolation; Mean square error methods; Neural networks; Nonlinear filters; OFDM; Spline; Wiener filter; OFDM channel estimation; Two-dimensional interpolation; fast fading channels;
Conference_Titel :
Internet, 2007. ICI 2007. 3rd IEEE/IFIP International Conference in Central Asia on
Conference_Location :
Tashkent
Print_ISBN :
978-1-4244-1007-1
DOI :
10.1109/CANET.2007.4401714
