| 摘要 |
<p>A method of demodulating a quadrature modulated signal includes first receiving the signal (Fig. 1). The rf signal is then quadrature demodulated (26, 27) to produce in-phase and quadrature signals (IBB, QBB). One of these signals is filtered (42, 45) to produce a correction signal (PIB, PQB) which is used for phase and amplitude correction (Fig. 2). Both of the demodulated signals are again quadrature demodulated (Figs. 3, 4) to produce the output signals. The second demodulation can be accomplished utilizing a correlation decoder (86, 87, 88, 89). The applied correlation pulse includes a subcarrier component.</p> |
