| 摘要 |
<p>Disclosed is a data modulator for transmitting a first sequence of data symbols at a symbol rate of 1/T, the modulator being characterized as having a carrier frequency of fc Hz and the data symbols being denoted as x(kT), where x(kT) is a real or complex number and k is the time index of the kth symbol. According to one aspect, a modulated signal generator receives the first sequence and generates, in response thereto and at the symbol rate, a second sequence of complex-valued signals y(kT), the signal y(kT) representing the complex number y(kT) = x(kT).exp (j2.pi.fCkT), where . A filter receives the second sequence and generates, in response thereto, a third sequence of real-valued signals, at a rate higher than the symbol rate, the third sequence representing linear combinations of the real and imaginary parts of the second sequence of complex-valued signals y(kT).</p> |
