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高速突发模式下π/4-DQPSK的相位捕获与跟踪 被引量：1

Phase Acquisition and Carrier Tracking Scheme for π/4-DQPSK High Rate Burst Communication Systems
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摘要 高速突发通信系统要求同步时间尽可能短,通过对一种数据辅助式快速相位捕获算法的分析,提出一种π/4-DQPSK调制信号的载波同步方案。仿真表明,当信噪比不小于8 dB时,该相位捕获算法仅需10个左右码元符号就能快速捕获载波相位。通过-π/4相位旋转运算,将π/4-DQPSK变换成DQPSK信号解调判决,能带来4 dB左右的解调增益,并可以将常用的QPSK载波跟踪环应用于π/4-DQPSK通信系统,硬件实现简单,便于系统的数字化。 A data aid carrier synchronization scheme for high rate burst mode communication systems is given. Computer simulation results show that the scheme just spends 10 symbols for initial phase acquisition when SNR = 10dB. In addi- tion, by - π/4 phase rotator, the normal QPSK phase tracking loo Pis suitable for π/4 - DQPSK. The proposed carrier synchronization scheme is suitable for digital implementation in burst communication systems.
作者 杨永齐 朱长根 冯文江
机构地区 重庆大学通信工程学院
出处 《重庆大学学报（自然科学版）》 EI CAS CSCD 北大核心 2007年第5期54-57,共4页 Journal of Chongqing University
基金 重庆市自然科学基金资助项目(CSTC 2005BB2193)
关键词 高速突发通信 Π/4-DQPSK 相位捕获 相位跟踪 high rate burst communication π/4 -DQPSK phase acquisition carrier tracking
分类号 TN914.3 [电子电信—通信与信息系统]
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参考文献9

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同被引文献9

  • 1胡云,赵林靖,李建东.软件无线电中π/4-DQPSK突发信号位定时算法[J].电子科技,2005,18(6):2-4. 被引量：2
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  • 4GOODE S H, KAZECKI H L, DENNIS D W. A comparison of a limiter-discriminator, delay and coherent detection for π/4-DQPSK[J]. IEEE Vehicular Technology Conf. , 1990 (5): 687-694.
  • 5LIU C L,FEHER K. π/4-DQPSK modems for satellite sound/data broadcat systems[J]. IEEE Transactions on Broadcasting, 1991,37 (1) : 1-8.
  • 6SIMON M K, WANG C C. Differential detection of gaussian MSK in a mobile radio environment[J]. IEEE Transactions, 1984,33 (4) : 34-36.
  • 7WEBB W T. Modulation methods for PCNS[J]. IEEE Communication Magazine, 1992(12) :28-32.
  • 8CHIA LIANG LIU, FEHER K. π/4-QPSK modems for satellite sound/data broadcast systems[J]. IEEE Transactions on Broadcasting, 1991,37(1) :23-25.
  • 9赵杭生,甘仲民,屈德新.π/4-DQPSK调制的快速位同步捕获和位同步跟踪[J].电子学报,1999,27(4):24-27. 被引量：11

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重庆大学学报（自然科学版）
2007年 第5期

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