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Title: Method and apparatus for recognizing modulation format of quadrature modulation signal
Other Titles: 一种识别正交调制信号的调制格式的方法及装置
Authors: Liu, J 
Luo, YZ
Lau, PT 
Lu, C 
Lu, YZ
Issue Date: 16-Mar-2018
Publisher: 中华人民共和国国家知识产权局
Source: 中国专利 ZL 201380001432.8 How to cite?
Abstract: Disclosed are a method and apparatus for recognizing the modulation format of a quadrature modulation signal, aiming to solve the problem in the prior art that there is a lower accuracy in recognizing the modulation format of signals. The normalized powers of a plurality of symbols in a symbol sequence of a received quadrature modulation signal are determined, the probabilities that the normalized powers of the symbols fall within each preset power range are determined to thereby determine a power distribution characteristic value of the quadrature modulation signal, and the modulation format of the quadrature modulation signal is determined according to the result of comparison between the determined power distribution characteristic value and a plurality of preset threshold values. The method described above can avoid the influence of frequency offset and phase noise on the result of recognition, and can effectively improve the accuracy in recognizing the modulation format of signals when applied to those systems with relatively larger frequency offset and phase noise, such as EON (Elastic Optical Network).
Rights: Assignee: 华为技术有限公司
Assignee: 香港理工大学
Appears in Collections:Patent

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