Negative SNR (Signal to Noise Ratio)
Desgining UMTS 3G RF transceiver, for receving chain, Base Band require trasnceiver to deliver signal with -6.5 dB SNR.
The reason to have negative SNR is that Code Spreading will provide gain for signal after demodulation.
However testing Negative SNR will be a real issue for RF engineers.
Please input your opinion!![转自52RD.com]
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发表于 2006-1-20 10:04:00
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