光学 精密工程, 2007, 15 (4): 604, 网络出版: 2008-02-18   

调制频率抖动对相干检测的影响及消除算法

Effect of modulation frequency Jitter on coherent detection and its elimination algorithm
作者单位
北京航空航天大学,光电技术研究所,北京,100083
摘要
介绍了调制频率偏移抖动的起因,并分析了相干检测过程中由于调制频率偏移抖动所引起的误差,对模拟和数字相干调制和解调过程建立了数学模型.基于文中所建立的数学模型,确定了调制频率偏移抖动对模拟和数字相干调制和解调过程的影响,特别是其对离散采样过程的影响关系.最后,提出了一种基于模糊逻辑的隶属函数加权采样算法,并进行了实验.实验结果表明,使用隶属函数加权采样算法后,当调制频率偏移范围小于±9.2%时,相干检测的精度未受影响;而未使用隶属函数加权采样算法时,当调制频率偏移范围大于±3%时,相干检测的精度便会受到影响.结果还表明,调制频率偏移抖动对模拟和数字相干检测过程影响的数学模型在相干检测应用领域很有价值,提出的隶属函数加权采样算法能够有效地消除调制频率偏移对相干检测的影响,其效果已经在应用中得到了验证.
Abstract
The causation of MFJE (Modulation Frequency Jitter and Excursion) is generally introduced,and the error of MFJE in coherent detection is analyzed at the same time, the mathematic models of MFJE error in analog and digital coherent detection process are built. Based on the mathematic models, the effects of MFJE on analog and digital coherent modulation-demodulation process are identified, especially the effect of MFJE on discrete sampling. Finally, a Membership Weighted Function Sampling (MWFS) algorithm is proposed. The experimental result shows that the precision of coherent detection has not been affected in a modulation frequency excursion range of ± 9.2 % with MWFS,compared with the range of ±3% without MWFS. The result also shows that the mathematic models of MFJE error in analog and digital coherent detection process are valuable in coherent detection application field and MWFS proposed in the paper can eliminate the effect of modulation frequency excursion on coherent detection efficiently, which has been certified in practice.
参考文献

[1] ZEFEVRE H.The Fiber-Optic Gyroscope[M].U S:Artech House,1993.

[2] 郭喜庆,武克用.新型陀螺经纬仪的研究与应用[J].光学精密工程,2001,9(2):182-185.GUO X Q,WU K Y.New type gyro-theodolite and its applications[J].Opt.Precision Eng.,2001,9(2):182-185.(in Chinese)

[3] 张尧禹,张明慧,周德俭.光纤陀螺的初步探讨[J].光学精密工程,2001,9(3):266-268.ZHANG Y Y,ZHANG M H,ZHOU D J.Research on optical fibre gyroes[J].Opt.Precision Eng.,2001,9(3):266-268.(in Chinese)

[4] BURR A G.Comparison of coherent and noncoherent modulation in the presence of phase noise[C].Communications,Speech and Vision,IEE Proceedings I,1992,139(2):147-155.

[5] 张卫国,曹永刚,陈涛.用数字滤波器改善光电经纬仪机械谐振频率的方法[J].光学精密工程,1999,7(2):77-82.ZHANG W G,CAO Y G,CHEN T.Digital filter approach to improving the resonance frequency of photoelectric theodolite[J].Opt.Precision Eng.,1999,7(2):77-82.(in Chinese)

[6] 王连明,葛文奇,谢慕君.采样频率、系统延迟对跟踪系统稳定性能的影响[J].光学精密工程,2000,8(4):369-372.WANG L M,GE W Q,XIE M J.Influences of sample frequency and delays on tracking system[J].Opt.Precision Eng.,2000,8(4):369-372.(in Chinese)

[7] LEESON D B.A simple model of feedback oscillator noise spectrum[J].Proc.IEEE,1966,54(2):329-330.

[8] 张智永,范大鹏,范世珣.光电稳定跟踪装置的控制系统设计[J].光学精密工程,2006,14(4):681-688.ZHANG ZH Y,FAN D P,FAN SH X.Servo system design for E-O stabilization and tracking devices[J].Opt.Precision Eng.,2006,14(4):681-688.(in Chinese)

[9] 郑晓虎,朱荻.模糊神经网络在UV-LIGA工艺优化中的应用[J].光学精密工程,2006,14(1):139-144.ZHENG X H,ZHU D.Application of fuzzy neural network to optimizing UV-LIGA process[J].Opt.Precision Eng.,2006,14(1):139-144.(in Chinese)

[10] 李鸣鸣,龚振邦,欧阳航空,等.实验数据RBF神经网络模型中噪声的处理方法[J].光学精密工程,2005,13(增):227-231.LI M M,GONG Z B,OU-YANG H K,etal.Strategies to the noise contained in experimental data in RBF neural network model[J].Opt.Precision Eng.,2005,13(supp):227-231.(in Chinese)

田海亭, 张春熹, 金靖, 宋凝芳, 潘雄. 调制频率抖动对相干检测的影响及消除算法[J]. 光学 精密工程, 2007, 15(4): 604. 田海亭, 张春熹, 金靖, 宋凝芳, 潘雄. Effect of modulation frequency Jitter on coherent detection and its elimination algorithm[J]. Optics and Precision Engineering, 2007, 15(4): 604.

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