TY - GEN
T1 - On capacity of optical channels with coherent detection
AU - Chung, Hye Won
AU - Guha, Saikat
AU - Zheng, Lizhong
PY - 2011
Y1 - 2011
N2 - Optical channel with direct detections, also known as Poisson channel, is well studied. With direction detections, only the intensity of the optical signal is measured and used as the carrier of information. In coherent detection, the phase of optical signal is also utilized. Constrained by optical devices, it is hard to directly measure this phase. However, it is possible to mix the input signal with a local reference signal to create output that is phase dependent. Generating such local signals can be based on the instantaneous receiver knowledge, and updated from time to time. We study the channel capacity of such channel, and make connection to the recent development in feedback channels. We are particularly interested in the low SNR regime, and present a capacity result based on a new scaling law.
AB - Optical channel with direct detections, also known as Poisson channel, is well studied. With direction detections, only the intensity of the optical signal is measured and used as the carrier of information. In coherent detection, the phase of optical signal is also utilized. Constrained by optical devices, it is hard to directly measure this phase. However, it is possible to mix the input signal with a local reference signal to create output that is phase dependent. Generating such local signals can be based on the instantaneous receiver knowledge, and updated from time to time. We study the channel capacity of such channel, and make connection to the recent development in feedback channels. We are particularly interested in the low SNR regime, and present a capacity result based on a new scaling law.
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U2 - 10.1109/Allerton.2011.6120259
DO - 10.1109/Allerton.2011.6120259
M3 - Conference contribution
AN - SCOPUS:84856102337
SN - 9781457718168
T3 - 2011 49th Annual Allerton Conference on Communication, Control, and Computing, Allerton 2011
SP - 879
EP - 885
BT - 2011 49th Annual Allerton Conference on Communication, Control, and Computing, Allerton 2011
T2 - 2011 49th Annual Allerton Conference on Communication, Control, and Computing, Allerton 2011
Y2 - 28 September 2011 through 30 September 2011
ER -