• ANKITA YADAV

In this paper we have implemented CFO correction under the influence of the CFO on OFDM transmission over AWGN channels. OFDM is very much sensitive to carrier frequency offset, which attenuates the desired signal & causes inter carrier interference, thus reducing the SNR. In this paper we have analyzed the Adaptive modulation with CFO and compared the average spectral efficiency with non-adaptive modulation methods. proposed adaptive modulation algorithm with CFO=0.05 achieves average spectral efficiency of that the proposed adaptive modulation algorithm gives optimum average spectral efficiency up to 5-6 bps/Hz for the target BER of 10-3& up to 8-9 bps/Hz for the target BER of 10-6. The proposed modulation technique is tested by MATLAB computer simulations and the simulation results exhibits better performance than the conventional adaptive modulation techniques.

Orthogonal Frequency Division Multiplexing, Carrier Frequency Offset, Inter Carrier Interference, Channel State Information, Bit Error Rate.

"ESTIMATION OF CARRIER FREQUENCY OFFSET IN OFDM SYSTEM BY USING ADPATIVE MODULATION TECHNIQUES", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.4, Issue 10, page no.514-523, November-2017, Available :http://www.jetir.org/papers/JETIR1710087.pdf

"ESTIMATION OF CARRIER FREQUENCY OFFSET IN OFDM SYSTEM BY USING ADPATIVE MODULATION TECHNIQUES", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.4, Issue 10, page no. pp514-523, November-2017, Available at : http://www.jetir.org/papers/JETIR1710087.pdf