Information Rate loss from radiation decoherence

Alfonso Martinez
2009 2009 IEEE International Symposium on Information Theory  
The information rates achievable by using electromagnetic radiation affected by thermal noise and signal decoherence are studied. The classical coherent-state Gaussian model is compared with an alternative photon gas model which represents lack of a shared phase reference between transmitter and receiver. At any frequency, the information rates in the presence of decoherence essentially coincide with those over a Gaussian model when the signal-to-noise ratio is below a threshold. Only above the
more » ... old. Only above the threshold does decoherence cause a significant loss in information rates; the loss can amount to half of the capacity. The threshold exceeds 40 dB for radio frequencies and vanishes at optical frequencies.
doi:10.1109/isit.2009.5205474 dblp:conf/isit/Martinez09 fatcat:qdranrtqtfhzjk72a7wh52kb24