| 摘要: |
| 根据采样数据恢复信号频谱后，采用频域估计法检测卫星信号中心频率，再利用延
迟相乘法估计卫星信号调制速率。通过内插恢复得到信号星座图，根据星座图特征对无先验
信息的卫星信号调制方式进行识别。利用实测的8PSK和QPSK卫星信号检测了识别的效果，
在信号信噪比低于5 dB时无法得到信号星座图。 |
| 关键词: 卫星信号；调制识别；调制速率；星座图 频域估计 |
| DOI： |
|
| 基金项目: |
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| A new modulation mode recognition method for satellite signals |
| YANG Jian,XU Hong-fei,CHEN Xi |
| () |
| Abstract: |
| The signal spectrum is reconstructed from the sample data and the center frequen
cy
is detected by using the frequency-domain estimation method,then
the signal modulation rate is estimated by adopting the delay-multipl
y method. Finally, the signal constellation can be obtained by interpolating and
sequence recovering. According to the constellation characteristic,
the modulation mode of satellite signal is recognized without knowing any a pri
ori i
nformation. The recognition effect is tested by taking the practical 8PSK and QP
SK satellite signals as example. Further more, the method can not resolve conste
l
lation when Signal-to-Noise Ratio(SNR) of signal is below 5 dB. |
| Key words: satellite signal modulation mode recognition modulation rate constellation f
requency-domain estimation |
《电讯技术》编辑部 