| 摘要 |
<p>RECEIVER FOR PHASE SHIFT MODULATED CARRIER SIGNALS A receiver for recovering digital data from phase-shift modulated carrier in a data communications system, wherein the length of the message preamble is insufficient to permit synchronous detection, divides the received signal into two channels . The channels having the larger and smaller signals are selected as the data and the servo channel, respectively The output of the servo channel is utilized to control the local oscillator frequency in order to provide for synchronous detection during at least a part of the message data.</p> |
