短語(yǔ)詞組短語(yǔ)if signal quadrature sampling 中頻正交採(cǎi)樣digital quadrature sampling 數(shù)字正交採(cǎi)樣IF quadrature sampling 中頻正交採(cǎi)樣direct if signal quadrature sampling 中頻正交採(cǎi)樣 返回 quadrature sampling