Title :
Performance Evaluation of Trellis Code Modulated oDQPSK Using the KLSE Method
Author :
Kumar, M. Sathish ; Yoon, Hosung ; Park, Namkyoo
Author_Institution :
Seoul Nat. Univ., Seoul
Abstract :
A direct detection optical differential quadrature phase-shift keying (oDQPSK) system with trellis coded modulation (TCM) is proposed and analyzed. From the results obtained for the symbol-error rate, it is observed that the proposed oDQPSK-TCM system can perform about 5 dB better than the uncoded oDQPSK system. Optical signal-to-noise ratio penalty due to first-order polarization-mode dispersion of the proposed oDQPSK-TCM system is evaluated and compared with that of unequalized as well as electrically equalized oDQPSK systems.
Keywords :
Karhunen-Loeve transforms; differential phase shift keying; optical dispersion; optical fibre communication; optical modulation; quadrature phase shift keying; series (mathematics); trellis coded modulation; KLSE method; Karhunen Loeve series expansion method; TCM; first-order polarization-mode dispersion; oDQPSK system; optical differential quadrature phase-shift keying system; optical signal-to-noise ratio; performance evaluation; symbol-error rate; trellis code modulation; Bandwidth; Constellation diagram; Convolutional codes; Modulation coding; Optical modulation; Optical noise; Performance analysis; Phase modulation; Phase shift keying; Signal to noise ratio; Optical fiber communication; optical differential phase-shift keying (oDPSK); optical differential quadrature phase-shift keying (oDQPSK); trellis coded modulation (TCM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.902243
