Abstract
Multilevel photon combined with binary pulse position modulation (BPPM) (Manchester pulsed
signals), is introduced in this letter. Initially, error probability derivation and explanation for four-level
photon communications with that BPPM is presented. Next, the 2-level photon communications matching with BPPM
is proposed. For performance comparison, it is done with that the conventional scheme by fixing the background
noise and also increasing number of photon per slot. Successfully with applying convolutional coding for
system improving, the proposed multilevel photon on BPPM with this coding scheme achieves higher gain.
Finally, this work also benefits to improving for further performance when considering with multilevel error
control coding as well.
© 2013 Chinese Optics Letters
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