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## Channel estimation for OFDM-IM systems

#### YUSUF ACAR [1] , SULTAN ALDIRMAZ ÇOLAK [2] , ERTUĞRUL BAŞAR [3]

Orthogonal frequency division multiplexing with index modulation (OFDM-IM) has been recently proposed to increase the spectral efficiency and improve the error performance of multicarrier communication systems. However, all the OFDM-IM systems assume that the perfect channel state information is available at the receiver. Nevertheless, channel estimation is a challenging problem in practical wireless communication systems for coherent detection at the receiver. In this paper, a novel method based on the pilot symbol-aided channel estimation technique is proposed and evaluated for OFDM-IM systems. Pilot symbols, which are placed equidistantly, allow the regeneration of the response of the channel so that pilot symbol spacing can fulfill the sampling theorem criterion. Our results shows that the low-pass interpolation and SPLINE techniques perform the best among all the channel estimation algorithms in terms of bit error rate and mean square error performance.
Channel estimation, orthogonal frequency division multiplexing, indices modulation, frequency selective fading channel, interpolation
Journal Section Articles Author: YUSUF ACAR Author: SULTAN ALDIRMAZ ÇOLAK Author: ERTUĞRUL BAŞAR Publication Date : June 1, 2019
 Bibtex @ { tbtkelektrik577548, journal = {Turkish Journal of Electrical Engineering and Computer Science}, issn = {1300-0632}, eissn = {1303-6203}, address = {}, publisher = {TUBITAK}, year = {2019}, volume = {27}, pages = {1908 - 1921}, doi = {}, title = {Channel estimation for OFDM-IM systems}, key = {cite}, author = {ACAR, YUSUF and ÇOLAK, SULTAN ALDIRMAZ and BAŞAR, ERTUĞRUL} } APA ACAR, Y , ÇOLAK, S , BAŞAR, E . (2019). Channel estimation for OFDM-IM systems. Turkish Journal of Electrical Engineering and Computer Science , 27 (3) , 1908-1921 . Retrieved from https://dergipark.org.tr/en/pub/tbtkelektrik/issue/45742/577548 MLA ACAR, Y , ÇOLAK, S , BAŞAR, E . "Channel estimation for OFDM-IM systems". Turkish Journal of Electrical Engineering and Computer Science 27 (2019 ): 1908-1921 Chicago ACAR, Y , ÇOLAK, S , BAŞAR, E . "Channel estimation for OFDM-IM systems". Turkish Journal of Electrical Engineering and Computer Science 27 (2019 ): 1908-1921 RIS TY - JOUR T1 - Channel estimation for OFDM-IM systems AU - YUSUF ACAR , SULTAN ALDIRMAZ ÇOLAK , ERTUĞRUL BAŞAR Y1 - 2019 PY - 2019 N1 - DO - T2 - Turkish Journal of Electrical Engineering and Computer Science JF - Journal JO - JOR SP - 1908 EP - 1921 VL - 27 IS - 3 SN - 1300-0632-1303-6203 M3 - UR - Y2 - 2020 ER - EndNote %0 Turkish Journal of Electrical Engineering and Computer Science Channel estimation for OFDM-IM systems %A YUSUF ACAR , SULTAN ALDIRMAZ ÇOLAK , ERTUĞRUL BAŞAR %T Channel estimation for OFDM-IM systems %D 2019 %J Turkish Journal of Electrical Engineering and Computer Science %P 1300-0632-1303-6203 %V 27 %N 3 %R %U ISNAD ACAR, YUSUF , ÇOLAK, SULTAN ALDIRMAZ , BAŞAR, ERTUĞRUL . "Channel estimation for OFDM-IM systems". Turkish Journal of Electrical Engineering and Computer Science 27 / 3 (June 2019): 1908-1921 . AMA ACAR Y , ÇOLAK S , BAŞAR E . Channel estimation for OFDM-IM systems. Turkish Journal of Electrical Engineering and Computer Science. 2019; 27(3): 1908-1921. Vancouver ACAR Y , ÇOLAK S , BAŞAR E . Channel estimation for OFDM-IM systems. Turkish Journal of Electrical Engineering and Computer Science. 2019; 27(3): 1921-1908.