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Radio communication device and transmitted power control method

A transmission power control and power technology, applied in wireless communication, power management, gain control and other directions, can solve the problems of increased circuit scale and power loss, reduced portability, etc., to achieve the effect of improving control accuracy

Inactive Publication Date: 2005-10-19
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using a high-precision variable power amplifier for variable power amplification control results in an increase in circuit scale and power loss and a decrease in portability

Method used

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  • Radio communication device and transmitted power control method
  • Radio communication device and transmitted power control method
  • Radio communication device and transmitted power control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] figure 1 is a flow chart showing the process of transmission power control according to the first embodiment of the present invention. Such as figure 1 As shown, in the case where a base station communicates with a mobile station, the base station determines transmission power bits based on radio waves received from the mobile station (S101), inserts transmission power control bits into a transmission signal, and transmits the resulting signal to the mobile station. The mobile station receives the signal transmitted from the base station, extracts the transmission power bit (S203), and controls its variable power amplifying unit (S205) according to the transmission power control bit and the states of the local station and the remote station detected in step 202.

[0047] In step S205, the mobile station may modify the control ratio of the variable power amplifying unit according to the states of the local station and the remote station. For example, the mobile stati...

Embodiment 2

[0075] figure 1 is a flowchart showing the procedure of the transmission power control method according to the second embodiment of the present invention. Such as figure 1 As shown, in the case where a base station communicates with a mobile station, the base station determines transmission power bits based on radio waves received from the mobile station (S101), inserts transmission power control bits into a transmission signal, and transmits the resulting signal to the mobile station. The mobile station receives the signal transmitted from the base station, extracts the transmission power bit (S203), and controls its variable power amplifying unit (S204) according to the transmission power control bit and the states of the local station and the remote station detected in step 202.

[0076] In step S204, the mobile station may modify the control ratio of the voltage control unit according to the status of the local station and the remote station. For example, the mobile st...

Embodiment 3

[0100] Figure 11 is a block diagram showing an embodiment of a radio communication device according to the present invention. exist Figure 11 Among them, reference numeral 11 represents an antenna, 12 represents a transmit / receive splitter, 13 represents a power amplifier, 14 represents a first variable power amplifier, 15 represents a second variable power amplifier, 16 represents a modulator, and 17 represents a digital / analog converter (DAC), 18 represents the variable power amplification control unit, 19 represents the first voltage controller, 20 represents the second voltage controller, 21 represents the control unit for controlling the voltage controller, 22 represents the baseband signal processor, 23 represents State detection unit, 24 represents a demodulator, 25 represents a radio transmitter, and 26 represents a radio receiver.

[0101] exist Figure 11 In the case of the radio communication device shown, the baseband signal processor 22 determines the transmiss...

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PUM

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Abstract

Radio communications apparatus according to the invention comprises a DAC, a variable power amplification unit including at least two variable power amplifiers, and variable power amplification control unit for controlling the variable power amplifiers. The variable power amplification control unit controls the variable power amplifiers in order to upgrade the accuracy of the apparatus and assures a smaller apparatus design.

Description

technical field [0001] The invention relates to a transmission power control method and a wireless communication device for effectively controlling transmission power in a cellular CDMA (Code Division Multiple Access) system. Background technique [0002] In a CDMA system, multiple users share a frequency band. This makes signals from other users become interference waves and causes degradation of the circuit quality of the local station. In order to solve this problem, a technique of transmitting power control is adopted. The transmission power control method by a closed loop is a transmission power control method for tracking an interfering signal that changes instantaneously. [0003] Figure 12 An example of a conventional transmission power control method by a closed loop is shown. Such as Figure 12 As shown, in the case where the base station and the mobile station communicate with each other, the base station determines transmission power bits based on radio waves...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03G3/20H04B1/04H04B7/005H04B7/26
CPCH04W52/52H04W52/36
Inventor 市川泰史
Owner PANASONIC CORP