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发明授权
CN101047688B 一种估计信噪比的方法及装置 失效 - 权利终止

一种估计信噪比的方法及装置
摘要：
本发明公开了一种估计信噪比的方法，该方法包括：在解调信号星座点中选择信号分量绝对值大于调制信号边缘星座点信号分量绝对值最大值的解调信号星座点，利用所选择的解调信号星座点计算噪声功率；计算发射信号功率；计算发射信号功率与噪声功率之比，得到信噪比的估计值。本发明还公开了一种估计信噪比的装置，该装置包括：星座图解映射单元、星座点选择单元、噪声功率计算单元、发射信号功率计算单元以及信噪比计算单元根据本发明公开的方法与装置，减少SNR的估计值和实际值之间的误差。
摘要（英）：

This invention discloses a method for estimating S/N ratio including: selecting demodulation signal constellation points with the absolute value of the signal component greater than that of the edge constellation point of the modulation signal to compute noise power utilizing the selected demodulated signal constellation points, computing emission power and the ratio with noise power to get an estimated value of the S/N ratio. This invention also discloses a device estimating S/N ratio including: a constellation scheme mapping unit, a constellation point selection unit, a noise power computation unit, an emission signal power computation unit and S/N ratio computation unit.

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