| 摘要 |
<p>Constant-amplitude and continuous-phase method of modulating digital data and of demodulating said modulated signal, said data taking the form of symbols a(n) that can take a number M of states at least equal to 2, characterized in that it comprises at the sending end a voltage-controlled oscillator (VCO) the control of which is the sum of pulses he(a(n), t - n T) whose shape and amplitude depend on the value of a(n) and that it comprises at the receiving end a single filter of impulse response Co(t) regardless of the value of M at the sending end, said functions h? and Co being characterized by several parameters that are optimized during the design of the system so as to obtain at output of the filter Co a constellation that is as close as possible to the theoretical constellation.</p> |
