esting model and resource allocation for SWIPT systems. IEEE Commun. Lett. 19(12), 2082-2085 (2015) 27. M.K. Ozdemir, H. Arslan, Channel estimation for wireless ofdm systems. IEEE Commun. Surv. Tut. 9(2), 18-48 (2007) 28. M. Seyfi, S. Muhaidat, J. Liang, Amplify-and-forward selection cooperation over Rayleigh fading channels with imperfect CSI. IEEE Trans. Wirel. Commun. 11(1), 199-209 (2011) 29. K.K. Garg, P.K. Singya, V. Bhatia, Performance analysis of NLOS ultraviolet communications with correlated branches over turbulent channels. IEEE/OSA J. Opt. Commun. Net. 11(11), 525-535 (2019) 30. K. Garg, P. Shaik, V. Bhatia, O. Krejcar, On the performance of relay assisted hybrid RF-NLOS UVC system with imperfect channel estimation. J. Optical Commun. Netw. (2021). [Online]. Available: https://doi.org/10.1364%2Fjocn.440819 31. Y. Liu, L. Wang, M. Elkashlan, T.Q. Duong, A. Nallanathan, Two-way relay networks with wireless power transfer: design and performance analysis. IET Commun. 10(14), 1810-1819 (2016) 32. P. Shaik, P.K. Singya, V. Bhatia, Performance analysis of QAM schemes for non-regenerative cooperative MIMO network with transmit antenna selection. AEU-Int. J. Electron. Commun. 107, 298-306 (2019) 33. J. Jose, P. Shaik, V. Bhatia, VFD-NOMA under imperfect SIC and residual inter-relay interference over generalized Nakagami-m fading channels. IEEE Commun. Lett. 25, 646-650 (2020) 34. K.K. Garg, P. Shaik, V. Bhatia, Performance analysis of cooperative relaying technique for non-line-of-sight UV communication system in the presence of turbulence. Opt. Eng. 59(5), 055101 (2020) 35. I.S. Gradshteyn, I.M. Ryzhik, Table of Integrals, Series, and Products (Academic, New York, 2014) 36. N. Yang, M. Elkashlan, P.L. Yeoh, J. Yuan, Multiuser MIMO relay networks in Nakagami-m fading channels. IEEE Trans. Commun. 60(11), 3298-3310 (2012) 37. S. Parvez, D. Kumar, V. Bhatia, On performance of SWIPT enabled two-way relay system with non-linear power amplifier, in NCC (IEEE, Piscataway, 2020), pp. 1-6 38. V. Bhatia, B. Mulgrew, N