Sixth-order statistics-based non-data-aided SNR estimation
Sixth-order statistics-based non-data-aided SNR estimation
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DOI：
10.1109/lcom.2007.348298
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发表时间：
2007-04-01
期刊：
影响因子：
--
通讯作者：
Mosquera, Carlos
中科院分区：
文献类型：
--
作者：
Lopez-Valcarce, Roberto;Mosquera, Carlos
信噪比估计是数字通信系统中的一项重要工作。对于非恒定模星座，经典二阶和四阶矩估计的性能随着信噪比的增加而下降。提出了一种新的非数据辅助估计方法，该方法利用接收数据的六阶矩，并可以针对特定星座进行调整，以扩大信噪比值的可用范围。对于具有两个不同幅度级的星座，例如16-幅相移键控（16-APSK），新方法的优势尤为显著。
Signal-to-noise ratio (SNR) estimation is an important task in many digital communication systems. With nonconstant modulus constellations, the performance of the classical second- and fourth-order moments estimate is known to degrade with increasing SNR. A new non-data-aided estimate is proposed, which makes use of the sixth-order moment of the received data, and which can be tuned for a particular constellation in order to extend the usable range of SNR values. The advantage of the new method is especially significant for constellations with two different amplitude levels, e.g. 16-Amplitude-and-Phase-Shift Keying (16-APSK).