摘要:
An amplification output control device includes: a determination unit that determines whether or not a gain of a power amplifier varies based on a monitor value of input power from a driver amplifier to the power amplifier, and, when determining that the gain varies, outputs a monitor value of output power of the power amplifier to a driver control unit to cause the driver control unit to execute control of a bias voltage of the driver amplifier; and a control unit that determines whether or not the gain varies based on the monitor value of the output power of the power amplifier when determining that the gain does not vary based on the monitor value of the input power to the power amplifier, and, when determining that the gain varies, controls the bias voltage of the power amplifier.
摘要:
A transmission power adjustment value acquisition unit outputs a transmission power adjustment value corresponding to transmission power with reference to a transmission power/adjustment value table. A transmission frequency correction value acquisition unit outputs a transmission power correction value from a center frequency of a position of an actually used RB received from a used transmission frequency calculation unit with reference to a transmission frequency/correction value table. An adjustment value addition unit adds the obtained adjustment value corresponding to the transmission power and the obtained transmission power correction value corresponding to a center value of the position of the actually used RB, thereby calculating a transmission power setting value. Since the transmission power correction value is obtained from the center frequency of the position of the RB that actually performs transmission, a difference between the transmission power setting value and the actual transmission power is reduced.
摘要:
A power control method of a base station in a wireless communication system based on Orthogonal Frequency Division Multiple Access (OFDMA) is provided for reducing power consumption by turning off the bias of the power amplifier for the duration of a symbol carrying no user data. The method includes checking scheduling information of radio resources, detecting a symbol carrying no user data, based on the scheduling information, and turning off a bias of the power amplifier for a symbol duration of the symbol carrying no user data. The transmission power control method is capable of reducing power consumption of the base station by turning off the bias of the power amplifier of the base station for the symbol duration in which no user data is transmitted.
摘要:
A method and apparatus for controlling uplink signal power in a distributed antenna system 10 having a master unit 22 and a plurality of remote units 14 and coupled with a base station 12 includes monitoring a noise condition of the distributed antenna system. The invention dynamically adjusts an uplink gain within the distributed antenna system 10 that is applied to uplink signals to a base station 12, based on the monitored noise condition. Monitoring the noise condition in the distributed antenna system 10 includes monitoring one or more remote units 14 of the plurality of remote units and determining if the remote unit is active status or mute status and then. The uplink gain is increased in response to a decrease in the number of remote units that are active status and decreased in response to an increase in the number of remote units that are active status.
摘要:
A method includes generating an indicator of interference introduced by a transmitter into a spectrum of an output transmit signal outside a target channel of the transmitter. The indicator is generated based on the output transmit signal. The method includes adjusting a power level of the output transmit signal based on the indicator and a predeterminedinterference indicator level. The indicator may indicate a carrier-to-interference (C/I) ratio of the output transmit signal, and the adjusting comprises setting the power level of the output transmit signal to a maximum power level that maintains the C/I ratio of the output transmit signal above the predetermined interference indicator level. The output transmit signal may be based on a radiofrequency output of a power amplifier of the transmitter prior to transmission over a channel and the generating comprises generating a baseband version of the output transmit signal.
摘要:
The invention discloses a base station (110, 300) for a cell (105) in a cellular communications system (100). The base station comprises a scheduler (310) for scheduling transmissions to users (115, 120) in the cell (105) and a transmitter with a power amplifier (325). The scheduler (310) is also arranged to set the output power level of the power amplifier (325) for an upcoming transmission period.