Generation of arbitrary quadrature signals using one dual-drive modulator

被引：71
作者：
Ho, KP [1 ]
Cuei, HW
机构：
[1] Natl Taiwan Univ, Inst Commun Engn, Taipei 106, Taiwan
[2] Natl Taiwan Univ, Dept Elect Engn, Taipei 106, Taiwan
来源：
JOURNAL OF LIGHTWAVE TECHNOLOGY | 2005年 / 23卷 / 02期
关键词：
differential quadrature phase-shift keying (DQPSK); external modulator; quadrature amplitude modulation; spectral efficiency;
D O I：
10.1109/JLT.2004.838855
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Regardless of the number of constellation points, all quadrature-amplitude modulation (QAM) signals can be generated using a single dual-drive Mach-Zehnder modulator. When the general method is applied to quadrature-phase-shift-keying (QPSK) signals, three different QPSK transmitters are shown with drive signals having four, three, or two levels. The usage of only one dual-drive modulator greatly simplifies the design of QAM and QPSK transmitters.
引用
收藏
页码：764 / 770
页数：7
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