| 摘要 |
A method of controlling operation of a wireless device configured in a zero intermediate frequency architecture (200) including a DC loop (347) and a gain loop (345). The method includes processing energy in a wireless medium to generate a corresponding receive signal R, monitoring the receive signal via a predetermined measurement window (RD), detecting a changed condition in the channel, holding the gain feedback control loop at a constant gain level, and operating the DC loop (347) in an attempt to search a stable DC value for the receive signal RD while the gain loop is held constant. A first case is DC saturation (901), where the gain is held constant until DC is controlled. A second case is clear channel assessment, where a prior stored gain setting is applied to the gain loop after detecting the end of the packet (1101). A third case is preparation for receiving an expected acknowledgement packet (1005) after transmitting a packet (1001), where again a prior stored gain setting is applied to the gain loop and DC is searched. |
