以下为句子列表：
英文: Based on invariability of the quality factor of wavelet transform, combined with proper wavelet group, this paper discusses the application of wavelet transform in the detection of backscatter signal.
中文: 摘要基于小波变换品质因数不变性的特点，结合适当的小波基，探讨小波变换在回波信号检测中的算法。
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