| 摘要: |
| 针对遥测频谱资源紧张的问题，提出跳时脉冲位置键控系统与PCM-FM系统同频段共存的设想。PCM-FM连续波系统平均功率较低，对跳时脉冲位置键控系统可看作热噪声。跳时脉冲位置键控系统瞬时脉冲功率高，但脉冲持续时间短，在脉冲持续时间以外功率为零，PCM-FM接收机通过限幅处理可降低脉冲信号对接收解调性能的影响。分析了两种系统同频段共存条件下跳时脉冲位置键控系统的误比特性能，分别在不同信号功率比、不同脉冲重复次数条件下进行了仿真。分析与仿真结果表明，跳时脉冲位置键控系统与PCM-FM系统可以同频段共存，并给出了误比特性能与信号功率比、脉冲重复次数之间的关系。 |
| 关键词: 遥测系统 跳时脉冲位置键控 PCM-FM 同频段共存 |
| DOI： |
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| 基金项目: |
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| Performance analysis of time hopping pulse position keying system coexisting with PCM-FM system |
| SHI Xianhua,LIU Youjiang,XIE Nan,ZHANG Jian |
| (Institute of Electronic Engineering,China Academy of Engineering Physics,Mianyang 621999,China) |
| Abstract: |
| To deal with the lack of telemetry spectrum resource,this paper proposes an idea that a time hopping pulse position keying(TH-PPK)system coexists with a PCM-FM system on the same frequency band.The PCM-FM system is a continuous wave system and its average power is very small,it can be taken as thermal noise to the TH-PPK system.And the pulse power of TH-PPK system is very large,but the pulses last very short,the PCM-FM system can reduce the influence of the pulses by limiting the input power.The bit error rate of the TH-PPK system coexisting with the PCM-FM system is analyzed,and the simulation on different power ratio and different repetition times is given.The results show that TH-PPK system can coexist with PCM-FM system on the same frequency band,and the relationship between error performance,power ratio and repetition times is provided. |
| Key words: telemetry system time hopping pusle position keying PCM-FM coexist at the same frequency band |
