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Description: Abstract：The scheme of IF digital receiver is now often adopted in software radio．The input of the receiver is analogical band—
pass signal，and beforeit’s demodulation，digital orthogonal decompositionmustbe done，thatistO conre_,1 a real sign al tO a coupleof
orthogo~N digital sequ~lces．According tO that two sequences，the instantaneous characters can be extracted easily and also the de—
modulated sign al can get over the~ign al distortion caused by signal path fading and Doppler shift．In this paper，the algorithms of or—
thogonal decomposition through traditional an alogical down-eonverting frequency，Hilbert tran sform ，digital mixing an d polyphase fil—
tering are studied in term of A／D converter’S position and the way to c}K)0Se sampling frequency．
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数字正交分解算法的研究.pdf
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