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DSSS系统中用于软限幅转发器的相关互调分量抵消技术 被引量:1

Counteraction Technology for Correlative Intermodulation Products Based on Soft Iimited Transparent Transponder in DSSS
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摘要 首先研究了传统 QPSK( Quadri Phase Shift Keying)扩频调制解调技术及其改进方案在干扰条件下的相关互调分量 ;然后针对软限幅透明转发器 ,建立了系统仿真模型 ,并给出性能仿真结果和分析结论。研究结果表明 ,改进方案能够显著改善存在干扰时软限幅条件下 DSSS( DS Spreading Spectrum)系统的误比特率性能 ,从而改善了系统的抗干扰能力 ,对于应用 DSSS技术的透明转发器卫星通信系统具有重要意义。 Firstly the correlative intermodulation products of traditional QPSK system and modified algorithms are analyzed. Then in view of soft limited transparent transponder, the simulation model is built. The simulation results and the conclusion are presented. The results show that the modified scheme could improve the system performance and the anti-jamming capability notably.
出处 《解放军理工大学学报(自然科学版)》 EI 2003年第5期26-29,共4页 Journal of PLA University of Science and Technology(Natural Science Edition)
关键词 软限幅 透明转发器 上行干扰 DS扩频技术 相关互调分号 soft limiting transparent transponder uplink interference DS spreading spectrum correlative intermodulation products
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参考文献6

  • 1[1]BAER H P. Interference effects of hard limiting in PN spread spectrum system[J]. IEEE Transactions on Communications,1982, 30(5):220-227.
  • 2[2]SEVY J L. The effect of hard limiting a biphase or quadriphase signal plus interference[J]. IEEE Transactions on Aerospace and Electronic Systems, 1969, 5(5):387-395.
  • 3[3]JONES J J. Hard limiting of two signals in random noise[J]. IEEE Transactions on Information Theory, 1963(1):34-42.
  • 4[4]ABRAMS B S. Making nonlinear interference rejection work in QPSK-SS receivers [C]. New York:IEEE Military Communications Conference, MILCOM 95, 1995.
  • 5[5]SALEH A. Frequency-independent and frequency-dependent nonlinear models of TWT amplifiers[J]. IEEE Trans Comm 1981,29(11):1715-1720.
  • 6[6]ARNSTEIN D S, VUONG X T, COTNER CB. The IM microscope:a new approach to nonlinear analysis of signals in satellite communication systems[J].Comsat Technical Review, 1992,22(1):93-121.

同被引文献7

  • 1CARLEMALM C,POOR H V,LOGOTHETIS A.Suppression of multiple narrowband interferers in a spread-spectrum communication system [J]. IEEE Journal on Selected Areas in Communications ,2000,18(8):1365-1374.
  • 2KRISHNAMURTHY V, LOGOTHIETIS A. Iterative and recursive estimators for hidden Markov errors-invariables models[J]. IEEE Trans Signal Processing,1996,44(3): 629-639.
  • 3COLLINGS I B, KRISHNAMURTHY V, MOORE J B. On-line identification of hidden Markov models via recursive prediction error techniques[J]. IEEE Trans Signal Processing, 1994, 42(12) :3535-3539.
  • 4DAVIDOVICI S,KANTERAKIS E G. Narrow-band inter-ference rejection using real-time Fourier transforms [J]. IEEE Trans Commun, 1989, 37 (7) : 713-722.
  • 5JEFFEREY A Y, JAMES S L. Analysis of DFT-based frequency excision algorithms for direct sequence spread spectrum communications [ J ]. IEEE Trans Commun 1998, 46(8): 1076-1087.
  • 6FREDRIC J H. On the use of windows for harmonic analysis with the discrete Fourier transform [J].Proceedings of the IEEE, 1978, 66(1):51-83.
  • 7郭道省,沈忠良,张邦宁,甘仲民.上行干扰条件下软限幅转发器中滤波器带宽的影响[J].解放军理工大学学报(自然科学版),2002,3(3):22-24. 被引量:3

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