| 摘要 |
This device for sending binary data (c<SUB>i</SUB>) at radio frequency in a transmission channel comprises: a signal generator designed to generate, for each binary data item (c<SUB>i</SUB>), a pulsed signal (p<SUB>i</SUB>) of duration shorter than the duration of said binary data item (c<SUB>i</SUB>); means of multiplication of said pulsed signal (p<SUB>i</SUB>) by at least one periodic signal of variable frequency (f<SUB>j</SUB>) specific to said sending device, said variable frequency (f<SUB>j</SUB>) being greater than the frequency of said pulsed signal (p<SUB>i</SUB>); and means of sending the pulsed signal (p<SUB>i</SUB>.f<SUB>j</SUB>) resulting from said multiplication.
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