signal to noise and distrotion ratio

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1.	讯号对杂讯与失真比 communica... ... 讯号强度 signal stregth 讯号对杂讯与失真比 signal to noise and distrotion ratio 讯号波形 signal waveform ... www.docstoc.com
2.	讯号对噪声与失真比通讯工程... ... 讯号强度 signal stregth 讯号对噪声与失真比 signal to noise and distrotion ratio 讯号波形 signal waveform ... www.scientrans.com