TY - GEN
T1 - Optical intensity modulation direct detection versus heterodyne detection: A high-SNR capacity comparison
AU - Chaaban, Anas
AU - Alouini, Mohamed-Slim
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work is supported in part by King Abdulaziz City of Science and Technology (KACST) under grant AT-34-145
PY - 2016/9/15
Y1 - 2016/9/15
N2 - An optical wireless communications system which employs either intensity-modulation and direct-detection (IM-DD) or heterodyne detection (HD) is considered. IM-DD has lower complexity and cost than HD, but on the other hand, has lower capacity. It is therefore interesting to investigate the capacity gap between the two systems. The main focus of this paper is to investigate this gap at high SNR. Bounds on this gap are established for two cases: between IM-DD and HD, and between IM-DD and an HD-PAM which is an HD system employing pulse-amplitude modulation (PAM). While the gap between IM-DD and HD increases as the signal-to-noise ratio (SNR) increases, the gap between IM-DD and an HD-PAM is upper bounded by a constant at high SNR. © 2015 IEEE.
AB - An optical wireless communications system which employs either intensity-modulation and direct-detection (IM-DD) or heterodyne detection (HD) is considered. IM-DD has lower complexity and cost than HD, but on the other hand, has lower capacity. It is therefore interesting to investigate the capacity gap between the two systems. The main focus of this paper is to investigate this gap at high SNR. Bounds on this gap are established for two cases: between IM-DD and HD, and between IM-DD and an HD-PAM which is an HD system employing pulse-amplitude modulation (PAM). While the gap between IM-DD and HD increases as the signal-to-noise ratio (SNR) increases, the gap between IM-DD and an HD-PAM is upper bounded by a constant at high SNR. © 2015 IEEE.
UR - http://hdl.handle.net/10754/622441
UR - http://ieeexplore.ieee.org/document/7566632/
UR - http://www.scopus.com/inward/record.url?scp=84991777399&partnerID=8YFLogxK
U2 - 10.1109/COMNET.2015.7566632
DO - 10.1109/COMNET.2015.7566632
M3 - Conference contribution
SN - 9781509001965
BT - 2015 5th International Conference on Communications and Networking (COMNET)
PB - Institute of Electrical and Electronics Engineers (IEEE)
ER -