Unverified50% confidenceFactExact time
FWHT与FFT都属于广义快速正交变换家族，但FFT处理复数域DFT矩阵需要复数乘法，而FWHT处理仅含±1的实数哈达玛矩阵不需要乘法
1
Sources
50%
Confidence
Long-term
Relevance
8/5/2026
First Seen
Sources
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