| 摘要: |
| 针对RWR/ESM中瞬时测频(IFM)无法对相位编码信号脉内参数进行测量的问题，提出了一种对载频的估计方法和两种对码元的估计方法。通过采用高采样率ADC采样、解模糊、平滑和取均值的处理流程对信号载频进行估计；利用相位跳变和相干解调两种方法分别对码元进行估计。仿真结果证明了上述方法对载频和码元估计的有效性。在对码元的估计中：相位跳变法实时性好，但需要一定的先验知识；相干解调法不需要任何先验知识，但实时性不好。所得结论对工程应用研究具有一定参考价值。 |
| 关键词: RWR/ESM系统 瞬时测频 相位编码信号 信号参数估计 |
| DOI： |
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| Parameter estimation of BPSK and QPSK signals based on IFM |
| WANG Xing,CAO Jin-long,ZHAO Yu,WANG Shi-yan,LI Cheng-zhi |
| () |
| Abstract: |
| According to the problem that instantaneous frequency measurement(IFM) of RWR/ESM system is unable to measure parameters of phase coded signals, a method for estimating carrier frequency and two methods for estimating code element are proposed.Through sampling with high sampling rate ADC,resolving ambiguity, excluding phase jump punctuation and averaging,carrier frequency is obtained.By making use of two estimation methods based on phase jump and coherent demodulation,code element is estimated. Simulation results show that those methods are efficient to estimate carrier frequency and code element. Estimation method based on phase jump of code element is good in real time, but needs transcendental information. Coherent demodulation is opposite. The conclusions have reference value for the engineering and study. |
| Key words: RWR/ESM system IFM phase coded signal signal parameter estimation |
《电讯技术》编辑部 