| 摘要 |
<p>A method of synchronizing wireless communication between computer (16) having a transmitter (24) and a peripheral device (50) having an amplitude modulated (AM) receiver (54) and at least one frequency modulated (FM) receiver (56) which communicates via radio frequency signals. The computer (16) partitions the data (28) into a plurality of data blocks (30), spreads the data blocks (30) over a plurality of frequency channels (38) within a predetermined range (70), and selects one of the channels (32) for transmitting the signal (40). The resulting signal (40) has increased and decreased frequency corresponding to the data block (30). The periferal device (50) detects the signal (40) as being present and beings measuring a time period (64) with the AM receiver (54). The method is characterized by scanning the plurality of frequency channels (38) with the FM receiver (56) during the measured time period (64). Additionally, the FM receiver (56) produces an output voltage (66) indicative of the radio frequency channel (32) in response to detecting the signal (40). The periferal device (50) utilizes the output voltage (66) to select a narrow range of frequency channels (74) during the time period (64) to detect the signal (40) from the computer (16).</p> |
