EFFECT OF DOUBLY SELECTIVE CHANNELS ABOUT BIT ERROR PROBABILITY IN OFDM AND FBMC

Öz

Filter bank multi carrier (FBMC) shows better spectral properties compared orthogonal frequency division multiplexing (OFDM). Double selective channels are described time selectivity and frequency selectivity which explore their performance variance in this paper. Closed form bit error probability (BEP) derives one top equalizers linear modulation techniques with OFDM and FBMC structures. When interference is closed to Gaussian noise, BEP error researching and Monte Carlo simulations are validated our analytically calculations. This paper presents us three scenarios that are OFDM without cyclic prefix (CP), CP-OFDM and FBMC applications about BEP over signal to noise ratio (SNR) for different channel models and different velocities. Applications are realized for theoretical, Gaussian approach, simulations and variations are shown with figures. The obtained BEP expressions utilize to define time variant propagation for OFDM and FBMC.

Anahtar Kelimeler

• OFDM,FBMC,Channel models,BEP,CP,Signal to noise ratio,time varying channels

Kaynakça

1. [1] Farhang-Boroujeny, B., OFDM versus filter bank multicarrier, IEEE Signal Process. Mag., 28 (2011), 3, pp. 92–112.
2. [2] Nissel, R., Rupp, M., Enabling low complexity MIMO in FBMC OQAM, IEEE Globecom Workshops (GC Wkshps), 2016, pp. 1–6.
3. [3] Rugini, L., Banelli, P., BER of OFDM systems impaired by carrier frequency offset in multipath fading channels, IEEE Trans. WirelessCommun., 4(2005), 5, pp. 2279–2288.
4. [4] Nissel, R., Lerch, M., Simko, M., Rupp, M., Bit error probability for pilot symbol aided OFDM channel estimation in double selective channels, WSA, 2014.
5. [5] Dong, X., Lu, W.-S., Soong, A., Linear interpolation in pilot symbol assisted channel estimation for OFDM, IEEE Transactions on Wireless Communications, 6(2007), 5, pp. 1910–1920.
6. [6] Hsieh M.-H., Wei, C.H., Channel estimation for OFDM systems based on comb-type pilot arrangement in frequency selective fading channels, IEEE Transactions on Consumer Electronics, 44(1998),1, pp. 217–225.
7. [7] Coleri, S., Ergen, M., Puri, A., Bahai, A., Channel estimation techniques based on pilot arrangement in OFDM systems, IEEE Trans. Broadcasting, 48(2002), pp. 223–229.
8. [8] Nissel, R., Caban, S., Rupp, M., Closed form capacity expression for low complexity BICM with uniform inputs, IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC), Hong Kong, China, 2015.

9. [9] Nissel, R., Rupp, M., OFDM and FBMC-OQAM in doubly-selective channels: calculating the bit error probability, IEEE Communications Letters, 21(6), 2017.
10. [10] Asplund, H., Larsson, K., and Okvist P., How typical is the ‘typical urban’ channel model? Proc. IEEE VTC, 2008, pp. 340–343.