Radio communication apparatus, transmission power control method and transmission power control program

Abstract

Provided are a radio communication device, a transmitter power control method and a program thereof, capable of performing transmitter power control with high precision. The TPC bit generating section generates TPC by variably controlling a transmitter power control width based on a difference between M-DIR measured based on a received signal and a target value T-SIR. The TPC_slope control section variably controls a factor used when the TPC bit generation section variably controls the transmitter power control width according to the difference between the M-BLER of the received signal and its target value T-BLER.

Description

technical field [0001] The present invention relates to a radio communication device, a method of controlling transmitter power, and a program, and in particular, to a radio communication device for generating transmitter control information based on a received signal from another station and It is sent to this other station. Background technique [0002] A mobile communication system using a code division multiple access method (CDMA method) is a multiple communication method that utilizes the space between the spreading codes assigned to the mobile stations by assigning spreading codes to each mobile station. The cross-correlation value of is zero. In practice, however, the cross-correlation value between the spreading codes cannot be practically zero, whereby the transmission signal of a particular mobile station becomes interference to the transmission signal of another mobile station. Thus, there is a problem commonly referred to as the near-far problem, wherein signa...

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Problems solved by technology

Therefore, when a sudden change occurs in the propagation environment of the downlink, the transmitter power control of the base station cannot follow the change of the propagation environment, thereby suddenly deteriorating the communication quality of the downlink so that the preset desired quality cannot be satisfied.

The transmitter power adjustment width of the base station can be set to a large value in advance to meet the sudden change in the propagation environment, but when the change in the propagation environment is relatively gentle, the transmitter power of the base station can be controlled to exceed the limit of the propagation environment. change, causing the problem of causing interference between mobile stations as described above, and degrading the communication capability because the problem of interference between mobile stations causes excessive downlink transmitter power to be requested

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