| 摘要 |
<p>The invention discloses a modulator (100, 300, 500) for an electrical signal which comprises a data input port (110, 310) and a clock frequency input port (120, 320) which is connected to the modulator via a first phase shifter (130, 330). The modulator (100, 300, 500) also comprises a first XOR gate (140, 340) with an output port (150, 370), to which XOR gate said input ports (110, 310; 120, 320) are connected, so that a BPSK signal is created at the output port (150, 370) when a first data stream (D1, D2) is connected to the data input port and a first clock frequency signal (fc) is connected to the clock frequency input port (120, 320). Suitably, the phase shifter (130, 330) is adapted to shift the phase of an input clock frequency signal ninety degrees.</p> |
