基于独特码检测的载波相位模糊纠正方法  

Carrier Phase-ambiguity Correction Based on Unique-word Detection

作　　者：王岳[1,2] 熊蔚明[1] 

机构地区：[1]中国科学院空间科学与应用研究中心,北京100080 [2]中国科学院研究生院,北京100080

出　　处：《现代电子技术》2009年第3期62-64,68,共4页Modern Electronics Technique

摘　　要：在数字相位调制系统的相干解调过程中,普遍存在着载波相位模糊问题。指出了差分相干解调与非相干解调方法的不足,进而针对QPSK,16QAM,16APSK调制方式,分析其相位模糊导致数据变化的情况,并给出了各自基于独特码检测的相位模糊纠正方法。QPSK系统的仿真结果说明了独特码检测方法在抗误码方面比DQPSK系统具有优越性。In digital phase modulation system, there always exists carrier phase- ambiguity in the process of coherent demodulation. This paper shows the disadvantages of differential coherent demodulation and non- coherent demodulation, then analyses the ambiguity of phase which causes the change of data in QPSK, 16QAM, 16APSK modulation methods when phase -ambiguity occurred. One method based on unique - word detection is given to achieve phase - ambiguity correction. The simulation of QPSK system shows the advantage of unique - word detection method in error resilience compared with DQPSK system.

关 键 词：数字相位调制 相干解调 相位模糊 独特码检测 

分 类 号：TN911.3[电子电信—通信与信息系统]