| 摘要: |
| 指挥控制系统的无线通信设备数量多、工作频率范围窄，相互之间存在严重的邻道干扰。针对近距离电台间邻道干扰问题，提出了基于功率谱解析的分析方法。首先理论推导了信号原功率谱密度函数与展宽延拓后功率谱密度的严格数学关系，在此基础上研究邻道干扰产生机制，进而分析不同邻道的干扰强度，得到了邻道功率与频率之间的关系式，推导了进入接收机的信干噪比（SINR）；最后，通过仿真验证了所提出的分析方法的可行性。理论计算与仿真结果相差在0.5 dB以内，为进一步有效规划指控系统频谱和提高利用效率提供了重要依据。 |
| 关键词: 指挥控制系统 无线电台 邻道干扰 功率谱解析 |
| DOI： |
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| 基金项目: |
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| Power spectrum resolution of adjacent channel interference for collocated wireless radios |
| LIU Jiancheng,QUAN Houde,SUN Huixian,LIU Guangkai |
| () |
| Abstract: |
| There are a large number of wireless communication radios in a command and control system. The radios operate at a narrow frequency band,therefore strong adjacent channel interference exists between them. To analyze this problem,a method is proposed based on resolution of power spectral density in this paper. Firstly,the mathematical closed-relation between the power spectral density function of original signal and power spectral density function of distortion signal is derived theoretically. Furthermore,the generation mechanism of adjacent channel interference is analyzed,and the interference strengths of different adjacent channels are investigated. The adjacent channel powers of different frequency bands are achieved to derive the signal-to-interference-plus-noise ratio(SINR) of receiver input. Finally,the simulation results show the validity of proposed analysis method,and the difference between theoretical and simulation results is less than 0.5 dB,which has the fundamental significance for arranging frequency spectrum and improving service efficiency in command and control systems. |
| Key words: command and control system wireless communication radio adjacent channel interference resolution of power spectral density |
《电讯技术》编辑部 