| 摘要 |
<p>The invention relates to a transceiver, to a power control system and method for controlling the transmission signal power of the transceiver. According to the invention, the power control system is destined to a cellular mobile telephone system, wherein the users communicate information signals between one another via at least one cell-site (12 and 14), by using code division multiple access spread spectrum communication signals (CDMA). The power control system controls the transmission signal power for each mobile unit (16 and 18) in the cellular mobile telephone has an antenna (70), a transmitter (84) and a receiver (72 and 74), and each cell-site (12 and 14) also has an antenna (52), a transmitter (62) and a receiver (54, 56). The power of the signals transmitted from the cell-sites (12 and 14) is measured as received at the mobile units (16 and 18). The power of the transmitter (84) is adjusted at the mobile units (16, 18) in an opposite manner with respect to increases and decreases in the received signal power. A feedback circuit may also be used for controlling the power. At the cell-sites (12, 14) in communication with the mobile unit (16, 18), the power of signals transmitted by the mobile unit (16, 18) is measured as received at the cell-sites (12, 14). A command signal is generated at the cell-site (12, 14) and transmitted to the mobile unit (16, 18) for a further adjustment of the transmitter power (84) of the mobile unit (16, 18), corresponding to power deviations in the cell-site (12 and 14). The feedback circuit is used to further adjust the power of the transmitter (84) of the mobile unit (16 and 18) so that the signals transmitted by the mobile station (16 and 18) arrive at the cell-site (12, 14) at a desired power level.</p> |
