文件名称:modulateddirectsequence
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- 2012-11-26
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- 353kb
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- ren****
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sequence spread spectrum transmissions
(DS-SS) are now widely used for secure
communications, as well as for multiple access.
They have many interesting properties, including
low probability of interception. Indeed, DS-SS
transmitters use a periodical pseudo-random
sequence to modulate the baseband signal before
transmission. A receiver which does not know the
sequence cannot demodulate the signal
(DS-SS) are now widely used for secure
communications, as well as for multiple access.
They have many interesting properties, including
low probability of interception. Indeed, DS-SS
transmitters use a periodical pseudo-random
sequence to modulate the baseband signal before
transmission. A receiver which does not know the
sequence cannot demodulate the signal
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Blind estimation of pseudo-random sequences of the carrier modulated direct sequence spread spect.pdf