• A.VANI
• Pranali Shankar Bargade

OFDM is a multicarrier modulation technique which provides high spectral efficiency. There is inter carrier interference (ICI) and inter symbol interference (ISI) in OFDM because of loss of orthogonality between the subcarrier. This problem is overcome by using cyclic prefixing (CP), which uses 20% of available bandwidth. Comparison between the FFT based OFDM systems with DWT based OFDM system have been made according to QAM modulation technique over AWGN. The wavelet families are compared with FFT based OFDM system. The results confirm that the DWT based OFDM system is better in terms of bit error rate (BER) performance.

OFDM; FFT; DWT Families [Haar; DB; Biorthogonal]; BER; SNR; LTE

"Comparison of BER Performance with DFT and DWT for MIMO-OFDM System ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.438-444, May-2019, Available :http://www.jetir.org/papers/JETIR1905M70.pdf

"Comparison of BER Performance with DFT and DWT for MIMO-OFDM System ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp438-444, May-2019, Available at : http://www.jetir.org/papers/JETIR1905M70.pdf