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., 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 will 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; Wiener filters; channel estimation; fading channels; interpolation; mean square error methods; 2D Wiener filter; MSE; fading wireless channel; linear filter; linear interpolator; mean square error method; orthogonal frequency division multiplexing; pilot-symbol-aided OFDM channel estimation; two-dimensional interpolation technique; 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 :
Telecommunication Networks and Applications Conference, 2007. ATNAC 2007. Australasian
Conference_Location :
Christchurch
Print_ISBN :
978-1-4244-1557-1
Electronic_ISBN :
978-1-4244-1558-8
DOI :
10.1109/ATNAC.2007.4665293
