| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compact, low cost and low power radio frequency transceiver having an efficient conflict resolution capability that fits into a housing sized within a compact form factor. <P>SOLUTION: A direct conversion receiver together with a voltage controlled oscillator, phase lock loop circuits, digitally controlled frequency divider circuits and a patch antenna providing wireless communication between a computer and another device are packaged into a compact enclosure in the radio frequency transceiver. The transceiver enters a sleep mode whenever it is idle in order to save power. A signature detector enables the transceiver to distinguish between noise and valid messages by recognizing a signature word embedded in a data packet. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
