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Mobile station having emitting power control system and method for compensating emitting power

A power control, mobile station technology, used in transmission systems, gain control, amplification control, etc.

Inactive Publication Date: 2004-01-07
LENOVO INNOVATIONS LTD HONG KONG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, no transmit power control system can meet the above requirements for compensation techniques

Method used

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  • Mobile station having emitting power control system and method for compensating emitting power
  • Mobile station having emitting power control system and method for compensating emitting power
  • Mobile station having emitting power control system and method for compensating emitting power

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Embodiment Construction

[0032] In order to understand the present invention, an early mobile station having a transmission power control system known to the present inventors is first explained here.

[0033] Referring to FIG. 1, an early mobile station includes a CDMA (or W-CDMA) transmission system and a transmission power control system. The CDMA transmission system includes a variable gain amplifier 1, a first bandpass filter 2, a mixer 3, a local oscillator 4, a second bandpass filter 5, a power amplifier 6, and an antenna 8, and the CDMA transmission system will output The transmission signal is sent to the base station. The transmission power control system includes a digital-to-analog (D / A) converter 12, a ROM table 16, and a level data register 13, and it controls the power of an output transmission signal by adjusting the gain of the variable gain amplifier 1. The signal processing procedure of this transmission system will be described below, and then the control method of the transmissio...

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PUM

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Abstract

The mobile station has a variable gain amplifier and adjusts a gain of the variable gain amplifier in accordance with a level data signal. The mobile station further has a compensation system for the transmission power control with respect to variance of environment surrounding to the mobile station. The compensation system partially extracts the output transmission signal over each slot and carries out a logarithmic wave detection of the extracted transmission signal to produce a resultant signal of the wave detection. Then the compensation system calculates for each slot an average error of the resultant signal of the level data signal and corrects the level data signal. When the gain of the variable gain amplifier is adjusted according to this newly level data signal, transmission power control is compensated and the mobile station produces a gain compensated transmission signal as the output transmission signal.

Description

technical field [0001] The invention relates to a mobile station with transmission power control and a method of compensating the transmission power control of the mobile station. Background technique [0002] In the field of cellular communications, the state of the art has been towards Code Division Multiple Access (CDMA) systems, especially Wideband Code Division Multiple Access (W-CDMA) systems. In a CDMA system, a base station provides a cell address (or short range cell address) and communicates with multiple subscriber mobile stations present on the cell address. Within a cell address, each mobile station uses a channel identified by a uniquely assigned numerical code. Therefore, communications between a base station and multiple mobile stations can be performed synchronously while sharing the same broadband spectrum. [0003] In a CDMA cellular system, the transmit power level of the mobile station becomes important. A base station receives signals from many diffe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/20H03G3/30H04B1/04H04J13/00
CPCH03G3/3036
Inventor 市原正贵
Owner LENOVO INNOVATIONS LTD HONG KONG