TY - JOUR
T1 - LDPC-coded optical coherent state quantum communications
AU - Djordjevic, Ivan B.
N1 - Funding Information:
Manuscript received June 30, 2007; revised September 11, 2007. This work was supported in part by the National Science Foundation (NSF) under Grant IHCS 0725405. The author is with the Department of Electrical and Computer Engineering, University of Arizona, Tucson, AZ 85721 USA (e-mail: [email protected]). Color versions of one or more of the figures in this letter are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/LPT.2007.909688
PY - 2007/12/15
Y1 - 2007/12/15
N2 - The problem of communication using optical coherent quantum states, in the presence of background radiation, is considered. Two modulation formats are studied, ON-OFF keying (OOK) and M-ary pulse-position modulation (PPM). The bit-error-rate performance improvement due to low-density parity-check coding is reported. For OOK, it is assumed that the coherent state signal has a random phase. For an average number of noise photons N=0.1, the required number of signal photons per information bit is six in the case of coded quantum OOK. For the same level of noise (N=0.1) and assuming that signal phase is known, coded 16-ary PPM requires only 1.21 of signal photons per information bit.
AB - The problem of communication using optical coherent quantum states, in the presence of background radiation, is considered. Two modulation formats are studied, ON-OFF keying (OOK) and M-ary pulse-position modulation (PPM). The bit-error-rate performance improvement due to low-density parity-check coding is reported. For OOK, it is assumed that the coherent state signal has a random phase. For an average number of noise photons N=0.1, the required number of signal photons per information bit is six in the case of coded quantum OOK. For the same level of noise (N=0.1) and assuming that signal phase is known, coded 16-ary PPM requires only 1.21 of signal photons per information bit.
KW - Coherent states
KW - Low-density parity-check (LDPC) codes
KW - Optical communications
KW - Quantum receiver
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U2 - 10.1109/LPT.2007.909688
DO - 10.1109/LPT.2007.909688
M3 - Article
AN - SCOPUS:36849070810
SN - 1041-1135
VL - 19
SP - 2006
EP - 2008
JO - IEEE Photonics Technology Letters
JF - IEEE Photonics Technology Letters
IS - 24
ER -