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Radio communication apparatus, method for radio communication transmission power control and record for recording the same method

A transmit power and transmit power control technology, applied in wireless communication, power management, transmission control/equalization, etc., can solve the problems of inability to respond to sudden changes in receive power, small transmit power control range, and reduced transmit power control accuracy, etc. Achieve the effect of reducing errors, improving accuracy, and suppressing interference waves

Inactive Publication Date: 2004-06-02
PANASONIC CORP
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  • Claims
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AI Technical Summary

Problems solved by technology

However, there is a problem that the small transmission power control range cannot respond to a sudden change in reception power, thereby degrading the accuracy of transmission power control

Method used

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  • Radio communication apparatus, method for radio communication transmission power control and record for recording the same method
  • Radio communication apparatus, method for radio communication transmission power control and record for recording the same method
  • Radio communication apparatus, method for radio communication transmission power control and record for recording the same method

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Embodiment Construction

[0027] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] figure 1 is a block diagram of a main part of a radio communication device according to an embodiment of the present invention. Figure 2 and image 3 is a flow chart of the transmission power control method according to the present invention.

[0029]A radio communication device according to the present invention is provided, for example, in a mobile communication device, including a base station or a mobile station of a cellular communication system, and amplifies the power of a signal containing transmission information to transmit the resulting signal to a remote station. The transmission power control method described here is preferable in the case where high-precision transmission power control is required while maintaining high linearity, specifically, such as in the case of a mobile phone device in a CDMA mobile communication system , s...

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Abstract

In controlling transmission power of a local station by using a transmission power control bit transmitted from a distant station to the local station, a communication state is detected by using at least one of a transmitting station transmission power change detector, a control state detector, reception power change detector, a transmission power control bit change detector, and a receiving station transmission power change detector, based on an output from a baseband signal processor. The transmission power control range corresponding to the transmission power control bit is changed based on the detection results of the detectors by a transmission power control bit controller. A variable power amplifier controller controls a variable amplifier based on the transmission power control bit and the transmission power control range and variably controls the transmission power via an antenna.

Description

technical field [0001] The present invention relates to a radio communication device used in a mobile communication system, said system includes a portable telephone set for mobile communication, etc., and relates to a radio communication device used for controlling mobile stations and A method of transmitting power between base stations and the like, and a computer-readable recording medium for storing the transmission power control method. Background technique [0002] In a code division multiple access (CDMA) mobile communication system using spread spectrum technology, a frequency bandwidth is shared by a plurality of users. A problem of so-called strong-field channel / weak-field channel, in which a high-power signal masks a low-power signal, is thus prone to occur, resulting in a decrease in the line quality of the local station due to a signal from another station appearing as an interference wave. In this mobile communication system, a transmission power control techn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26H04B7/005
CPCH04W52/367H04W52/362H04W52/08H04W52/24
Inventor 市川泰史
Owner PANASONIC CORP
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