摘要
现代数字载波通信广泛使用差分四相移相键控调制(DQPSK)方式。在DQPSK系统中,双比特四进制格雷码差分编码器和QPSK调制器是设计关键。在分析DQPSK相位跳变原理和信号编码规则的基础上,设计出了双比特格雷码差分编码器和QPSK调制器的电路图,并用Multisim做了仿真,给出了仿真波形。
Differential Quadrant Phase Shift Keying （DQPSK） is widely used in modem digital microwave communication. In DQPSK system, the key problem of design is double-bit gray differential coder and QPSK modulator. On the basis of analysis of phase variation and code rule, the circuits of double-bit gray differential coder and QPSK modulator are designed, and their input and output waves are got by using multisim software.
出处
《苏州市职业大学学报》
2008年第1期78-80,87,共4页
Journal of Suzhou Vocational University
基金
苏州市职业大学科研课题资助(SZDL0620)
