Title :
Multilevel differential polarization shift keying
Author :
Blaikie, Richard J. ; Taylor, Desmond P. ; Gough, Peter T.
Author_Institution :
Dept. of Electr. & Electron. Eng., Canterbury Univ., Christchurch, New Zealand
fDate :
1/1/1997 12:00:00 AM
Abstract :
We analyze the performance of coherent optical communication systems which employ polarization shift keying (PolSK) modulation, introducing for the first time the requirements for multilevel, differential PolSK. For M-ary signal constellations with M>2, the three-dimensional (3-D) nature of the signal constellations within Stokes space requires the use of double-differential modulation and detection (M-DDPolSK). Coding constraints on the signals place an additional restriction on such systems. We present detailed analysis and simulations for a 6-DDPolSK modulation scheme in which the signal points are located at the vertices of an octahedron in Stokes space
Keywords :
differential phase shift keying; encoding; light polarisation; optical communication; optical modulation; optical signal detection; 3D signal constellations; 6-DDPolSK modulation; M-ary signal constellations; Stokes space; coding constraints; coherent optical communication systems; double-differential detection; double-differential modulation; multilevel differential polarization shift keying; octahedron; signal points; simulations; system performance; vertices; Amplitude modulation; Bandwidth; Constellation diagram; Optical fiber communication; Optical fiber polarization; Optical polarization; Optical receivers; Performance analysis; Phase modulation; Polarization shift keying;
Journal_Title :
Communications, IEEE Transactions on
