| GMSK+PN信号信噪比估计 |
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| 引用本文： | 石立国,王竹刚,熊蔚明.GMSK+PN信号信噪比估计[J].系统工程与电子技术,2016,38(1):26-30. |
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| 作者姓名： | 石立国 王竹刚 熊蔚明 |
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| 作者单位： | 1. 中国科学院空间科学与应用研究中心, 北京 100190;
2. 中国科学院大学, 北京 100190 |
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| 摘 要： | 针对数传、测距一体化的调制方式高斯最小频移键控复合伪码测距(Gaussian minimum shift keying+pseudo-noise, GMSK+PN)信号的信噪比估计,提出了一种精度较高、复杂度较低的快速算法。该算法采用层状结构分解的方式,将信号分解为若干信号单元,对每一个分解的信号单元进行功率分配计算或信噪比估计,最后快速准确地计算出整个信号的信噪比。信噪比在 1~13 dB之间时,估计误差小于0.5 dB。利用Simulink仿真工具,验证了该算法的有效性。
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SNR estimation algorithm for GMSK+PN signal |
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| SHI Li-guo,WANG Zhu-gang,XIONG Wei-ming.SNR estimation algorithm for GMSK+PN signal[J].System Engineering and Electronics,2016,38(1):26-30. |
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| Authors: | SHI Li-guo WANG Zhu-gang XIONG Wei-ming |
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| Institution: | 1. Center for Space Science and Applied Research,Chinese Academy of Sciences, Beijing 100190, China;;
2. University of Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | Gaussian minimum shift keying+pseudo-noise (GMSK+PN) is a modulation method which achieves simultaneously transmission of GMSK data and PN. For the signal to noise ratio (SNR) estimation of GMSK+PN modulation, a fast algorithm with high accuracy and low complexity is proposed. This algorithm applies layered structure decomposition to decompose signals into a number of units. Each decomposed signal’s power is calculated or SNR is estimated. Then, signal power distribution calculation or SNR estimation is conducted successively for according units. Finally, SNR of the entire signal is calculated quickly and accurately. Estimation error is less than 0.5 dB when SNR is between 1~13 dB. Simulink simulation results verify the effectiveness of the proposed algorithm. |
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