Reproduced results for the papers [1] and [2].

[1] G. Wang, F. Gao, R. Fan and C. Tellambura, "Ambient Backscatter Communication Systems: Detection and Performance Analysis," in IEEE Transactions on Communications, vol. 64, no. 11, pp. 4836-4846, Nov. 2016

[2] G. Yang, Y. Liang, R. Zhang and Y. Pei, "Modulation in the Air: Backscatter Communication Over Ambient OFDM Carrier," in IEEE Transactions on Communications, vol. 66, no. 3, pp. 1219-1233, March 2018.