Carl N. Kelly, Someshwar C. Gupta. Discrete-time demodulation of continuous-time signals. IEEE Transactions on Information Theory, 18(4):488-493, 1972. [doi]
@article{KellyG72,
title = {Discrete-time demodulation of continuous-time signals},
author = {Carl N. Kelly and Someshwar C. Gupta},
year = {1972},
doi = {10.1109/TIT.1972.1054858},
url = {http://dx.doi.org/10.1109/TIT.1972.1054858},
researchr = {https://researchr.org/publication/KellyG72},
cites = {0},
citedby = {0},
journal = {IEEE Transactions on Information Theory},
volume = {18},
number = {4},
pages = {488-493},
}