| 摘要 |
<p>An RF/ID interrogator (10) is provided for recovering a data signal from an RF/ID tag (15). The interrogator (10) includes a radio (40) having a receiver portion (40b) to receive in-phase (I) and quadrature-phase (Q) signals from the RF/ID transponder (15) transmitted at a predetermined bit-rate, and a processor (30) coupled to the radio for controlling operation of the radio in accordance with stored program instructions. In one embodiment, the interrogator (10) performs over-sampling of the data signal received from the RF/ID tag (15) in order to provide a high data recovery rate. In another embodiment, the interrogator (10) performs a selection between the I and Q signals in order to achieve optimum data recovery.</p> |
