New Carrier Recovery Method for 16-QAM Based on Full Constellation Points
-
摘要: 为提高16-QAM载波恢复的性能,探讨了16-QAM信号的相位与其传送信息之间的关系,并提出了一种基于全星座信号点的16-QAM载波恢复方法.该方法通过对信号的处理,使所有信号都能被载波恢复环利用.分析和仿真结果表明,与传统方法相比,基于全星座信号点的载波恢复方法的捕获带宽更大,而相位跟踪误差更小.Abstract: To improve the carrier recovery performance of 16-ary quadrature amplitude modulation(16-QAM),the relationship between the transmitted data symbol and the signal phase in the constellation was investigated.Based on the relationship,a new carrier recovery method was proposed.In this method,both the diagonal and non-diagonal signal points are used for carrier recovery.The analysis and simulation results show that compared with the traditional carrier recovery methods, the proposed method can provide a wider acquisition bandwidth and smaller phase errors.
-
ANTHNY J,RUSTAKO LARRY J.Using times-four cartier recovery in M-QAM digital radio receivers[J].IEEE Journal on Selected Areas in Communications,1987,SAC-5 (3):524-533.[2] 朱兵,张国庭.4倍频载波恢复在16QAM中的应用[J].通信技术及应用,2004(22):50-53.[3] SARI H,MORIDI S.New phase and frequency detectors for carrier recovery in PSK and QAM'systems[J].IEEE Trans.on Communications,1988,36(9):1 035-1 043.[4] BENANI A M,GAGNON F.Comparison of carrier recovery techniques in M-QAM digital communication systems[C]//2000 Canadian Conference on Electrical and Computer Engineering,World Trade and Convention Centre,Halifax,Nova Scotia,May 7-10,2000.Piseataway:IEEE Press,2000:73-77.[5] PARK Y,AHN J.A new carrier recovery method for 16-QAM signal[C]//IEEE International Conference on Personal Wireless Communications.Mumbai,India,December 17-19,1997.Piseataway:IEEE Press,1997:194-197.[6] KIM M,SEONG J,OH D.A phase lock detector for 16-QAM system for high-speed wireless communications[J].IEICE Trans.Communications,2002,E85-B(3):658-662.[7] 沈丽丽,米亮,葛建华.适合高阶QAM的载波恢复算法[J].数字电视与数字视频,2003(12):13-20. -
点击查看大图
计量
- 文章访问数: 1051
- HTML全文浏览量: 60
- PDF下载量: 537
- 被引次数: 0
下载: