35results about How to "Transmit power control" patented technology

The averaging circuit 106 averages the desired wave power measured by the desired wave power measuring circuit 105 within a plurality of time slots to reduce the power error of the desired wave power in each time slot. The SIR measurement circuit 108 calculates the SIR(n) of each time slot based on the average value of the desired wave power of a plurality of time slots and the measured value of the interference wave power of each time slot. The TPC generation circuit 109 calculates the SIR(n) of each time slot. ) and the threshold to generate transmit power control information. This enables highly accurate control of the transmission power for each time slot in asymmetric communication.

Embodiments of the present invention disclose a method for controlling power of an uplink multiple-input multiple-output channel, and a user equipment that are used to support an uplink MIMO application scenario and implement control of transmit power of a UE. The method in the embodiments of the present invention includes: when total transmit power of a user equipment UE is greater than maximum allowed transmit power, performing, by the UE, power reduction for an uplink multiple-input multiple-output MIMO channel on which a main data transmission block and a secondary data transmission block are sent, so that the total transmit power of the UE after the reduction is less than or equal to the maximum allowed transmit power.

A kind of power control method in the high speed shared control channel, includes the following steps: A. determines the demodulation performance of the high speed shared control channel HS-SCCH at the base station (s101); B. adjusts the transmission power offset parameter of the high speed shared control channel HS-SCCH at the base station according to said demodulation performance of the high speed shared control channel HS-SCCH (s 102); C. adjusts the transmission power of the high speed shared control channel HS-SCCH according to the adjusted power offset parameter of the high speed shared control channel HS-SCCH (s103). The invention adaptively increases or reduces the transmission power according to the case that the down channel transmission power is on the low side or on the high side. It can be validly guaranty the demodulation performance requirement and the user data transmission rate, and also can make the most of the Node B downlink transmission power.

Disclosed is a radio terminal capable of providing flexible transmission power control of SRS without being restricted by transmission power control of PUSCH in order to realize utilization of SRS for various purposes in a HetNet CoMP environment. The wireless terminal receives a control signal including a transmission power control command (TPC command) applicable to an aperiodic sounding reference signal (A-SRS) through the physical downlink control channel (PDCCH), and uses the TPC command to update the A-SRS transmit the power value, and transmit the A-SRS with the updated transmit power value according to the transmission request contained in the control signal notifying the allocation of the physical downlink data channel (PDSCH) or the allocation of the physical uplink data channel (PUSCH).

Provided is a transmission power control method capable of accurately controlling a transmission power even when the transmission power control time is limited. The method includes: a first measurement step for measuring an output power of a power amplifier before mode switching during a symbol section preceding a symbol section for switching the power amplifier mode; a first setting step for setting a target power of the power amplifier after the mode switching according to the measurement result obtained in the first measurement step and a transmission power control signal; a second measurement step for measuring an output power of the power amplifier after the mode switching which is controlled by using the target power set by the first setting step, during the symbol section for switching the power amplifier mode; and a second setting step for setting a target power corrected according to the measurement result obtained by the second measurement step.

An improved power control method and device for a mobile terminal are provided to facilitate a random access procedure in a mobile communication system based on a distributed antenna system. The method includes: receiving, by a terminal, system information from a base station, the system information including transmission power information for transmitting a random access preamble; calculating transmission power using the transmission power information; and transmitting the random access preamble using the calculated transmission power .

The invention discloses a transmission channel power adaptive method, an adaptive device, and a sending device. The method includes adjusting the transmission channel power when the sending device is in the first working state, so that the E of the receiving device s / N 0 Satisfy the theoretical demodulation threshold; when the sending device switches to the second working state, according to the adjusted transmission channel power in the first working state, the working parameters of the sending device in the first working state, and the parameters of the sending device in the second working state Working parameters, and the theoretical demodulation threshold E of the receiving device in the first working state s / N 0 and the theoretical demodulation threshold E of the receiving device in the second working state s / N 0 , calculating actual transmit channel power when the sending device is in the second working state, and configuring the actual transmit channel power for the sending device in the second working state. When guaranteeing the link quality, the transmission power should be reduced as much as possible to reduce the interference of adjacent channels and the burden of satellite transponders and power amplifiers.