Impact of Electrical Band-Limitation on Transmission Performance of CSRZ and CSRZ-DPSK Modulation Formats for High Spectral Efficiency DWDM Systems. - Dong-Soo Lee; Yang Jing Wen; Je Soo Ko; Man Seop Lee; Ampalavanapillai Nirmalathas (IEICE Trans. Commun., 2005)