Description: Based pn sequence length Lc, for the input signal Lc times, input bandwidth for f, then after a spread-spectrum, the channel bandwidth for the transmission signal Lc* f,. Attenuation would have been impatient for the original 1/Lc. Demodulation client in the same pn sequence demodulator. This advantage is widening the band, and is conducive to the transmission of signals remain confidential and will only know that side of pn sequence modulation in order to correctly signal demodulation In addition, since the sound attenuation impatient to a large extent reduce the bit error rate
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