Ajay Kumar Maurya, Ravi Prakash, Rakesh Kumar Maurya, B. B.Tiwari, R. K. Singh. “Contrastive Performance Analysis of US-OIDMA Using Different Code Rate and Constraint Length”. International Journal of Advanced Science and Technology, Vol. 29, no. 08, June 2020, pp. 4842 -52, http://sersc.org/journals/index.php/IJAST/article/view/26763.