| 摘要: |
| 为提高机载选呼系统解码正确率，提出了基于能量重心法的机载选呼解码算法。通过能量重心法校正选呼信号频率及幅值的估值，降低频谱泄露及栅栏效应的影响，并设计解码状态机完成解码过程。通过对高噪声环境下的仿真和某型飞机实验室试验验证算法有效性和实用性，结果表明所提出算法连续长时间试验均成功解码，且频率估计值与理论值基本无误差，幅度值误差低于10%，因此基于能量重心的解码算法适用于机载选择呼叫系统。 |
| 关键词: 机载选择呼叫系统 能量重心法 离散频谱校正 解码算法 快速傅里叶变换 |
| DOI： |
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| 基金项目: |
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| Application of energy centrobaric method in decoder of airborne SELCALL system |
| LYU Yi |
| () |
| Abstract: |
| For improving the correctness of SELCALL decoder,a decoding algorithm based on the energy centrobaric method is proposed.The estimated values of signal frequency and amplitude are regulated by the energy centrobaric method,and the state machine is designed for the decoding flow.The simulation in strong-noisy environment and the lab test on a certain type airplane are done to verity the effectiveness of the proposed algorithm.The results show that the decoder is useful for a long time test when the proposed algorithm is used.The estimated frequency value is almost unbiased and the estimated amplitude error is less than 10%.So the decoding algorithm based on the energy centrobaric method is applicable in airborne SELCALL system. |
| Key words: airborne SELCALL system energy centrobaric method discrete spectrum correction decoding algorithm fast Fourier transform |
