KR20040031928A - Receive power compensation method for frequencies of mobile communication device - Google Patents
Receive power compensation method for frequencies of mobile communication device Download PDFInfo
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- KR20040031928A KR20040031928A KR1020020061068A KR20020061068A KR20040031928A KR 20040031928 A KR20040031928 A KR 20040031928A KR 1020020061068 A KR1020020061068 A KR 1020020061068A KR 20020061068 A KR20020061068 A KR 20020061068A KR 20040031928 A KR20040031928 A KR 20040031928A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000010295 mobile communication Methods 0.000 title claims abstract description 14
- 238000013507 mapping Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/294—Indexing scheme relating to amplifiers the amplifier being a low noise amplifier [LNA]
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Abstract
Description
본 발명은 이동 통신 단말기의 주파수별 수신파워 보상 방법에 관한 것으로, 특히 이동 통신 단말기에서 각 채널간 수신부의 성능 편차를 줄일 수 있도록 하는 이동 통신 단말기의 주파수별 수신파워 보상 방법에 관한 것이다.The present invention relates to a method for compensating reception power for each frequency of a mobile communication terminal, and more particularly, to a method for compensating reception power for each frequency of a mobile communication terminal to reduce the performance deviation of a receiver between channels in the mobile communication terminal.
일반적으로, 기지국에서 송출된 송신 파워는 단말기에 수신될 때 채널(1011CH ~ 779CH)별로 수신 파워(Rx Power)가 일정하지 않은데, 이러한 수신 파워(Rx Power)가 수신 복조단(BBA)에 채널 별로 일정하게 입력되도록 이득(AGC)을 조절하기 위해 주파수별 수신파워 보상(CDMA Rx COMP Vs FREQ.)이라는 조정(Calibration)을 실행한다.In general, when the transmission power transmitted from the base station is received by the terminal, the reception power (Rx Power) is not constant for each channel (1011CH to 779CH), and the reception power (Rx Power) is for each channel to the reception demodulator (BBA). In order to adjust the gain (AGC) to be input constantly, a calibration called frequency-dependent receive power compensation (CDMA Rx COMP Vs FREQ.) Is performed.
그러나, 기존에는 이러한 조정(Calibration)을 모든 단말기에 대해서 실제로 조정(Calibration)을 하지 않고, 개발자가 여러 대의 단말기에 대한 측정치의 평균치(AGC)를 적용함으로써, 실제로 수신 복조단에 입력되는 파워가 채널별로 편차가 심했다.However, in the past, such a calibration is not actually performed for all terminals, and the developer applies an average value (AGC) of the measured values for several terminals, so that the power actually input to the receiving demodulation stage is channeled. There was not much variation.
즉, 종래의 기술은 기지국에서 송출된 송신 파워가 단말기에 수신될 때, 채널(1011CH ~ 779CH) 별로 수신 파워(Rx Power)가 일정하지 않는 것을 보상하기 위해 개발자가 여러 대의 단말기에 대한 측정치의 평균 이득(AGC)값을 주파수별 수신 파워 보상 조정 테이블(Calibration table)에 직접 입력함으로써, 채널간 수신 파워(Rx Power)의 편차를 일률적으로 보상하기 때문에, 단말기마다 정확한 채널간의 수신 파워의 편차를 보상해 줄 수 없었다.That is, in the related art, when the transmission power transmitted from the base station is received by the terminal, the developer averages the measurement values for the multiple terminals to compensate for the inconsistent Rx power for each of the channels 1011CH to 779CH. By directly inputting the gain (AGC) value into the reception power compensation adjustment table for each frequency, it compensates for the variation in Rx Power between channels uniformly, thereby compensating for the variation in the reception power between channels accurately for each terminal. I couldn't do it.
이에 따라 단말기마다 수신부의 성능에 많은 편차가 발생함으로써, 각 단말기에 대한 정확한 파워 제어가 되지 않는 문제점이 있다.As a result, a large variation in the performance of the receiver for each terminal causes a problem in that accurate power control for each terminal is not performed.
따라서, 본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 창출한 것으로, 이동 통신 단말기에서 각 채널간 수신부의 성능 편차를 줄일 수 있도록 하는 이동 통신 단말기의 주파수별 수신파워 보상 방법을 제공함에 그 목적이 있다.Accordingly, an object of the present invention is to provide a method for compensating reception power for each frequency of a mobile communication terminal, which can be used to solve the above-mentioned problems. There is this.
이와 같은 목적을 달성하기 위한 본 발명은, 이동 통신 단말기의 주파수별 수신파워 보상을 위한 이득 조정값 및 파워 테이블을 초기화하는 단계와; 상기 단말기의 내부 메모리에 저장되어 있는 기준채널에 대한 수신파워를 얻기 위한 이득 값을 결정하는 단계와; 전체 주파수 범위에서 이득 조정을 위한 다수의 채널을 설정하여, 각 채널에 대하여 상기 기준 채널에 대한 수신파워를 얻을 수 있는 이득(AGC)값을 구하는 단계와; 상기 각 주파수별 수신파워 보상을 위한 이득 값을상기 주파수별 보상 테이블에 매핑하고, 상기 각 채널의 사이에 있는 주파수에 대해서는 선형(Linear)화하여 보상하는 단계와; 상기 선형화를 포함한 모든 주파수 구간에 대해서 수신파워 조정 값이 구해지면, 그 조정 값들을 단말기의 내부 메모리에 저장하는 단계를 포함하여 이루어진 것을 특징으로 한다.According to an aspect of the present invention, there is provided a method including: initializing a gain adjustment value and a power table for reception power compensation for each frequency of a mobile communication terminal; Determining a gain value for obtaining a reception power for a reference channel stored in an internal memory of the terminal; Setting a plurality of channels for gain adjustment over the entire frequency range, and obtaining a gain (AGC) value for each channel to obtain a reception power for the reference channel; Mapping a gain value for receiving power compensation for each frequency to the compensation table for each frequency, and linearizing and compensating for frequencies between the channels; When the received power adjustment value is obtained for all frequency sections including the linearization, storing the adjustment value in the internal memory of the terminal.
도 1은 본 발명에 의한 이동 통신 단말기의 주파수별 수신파워 보상 방법을 보인 순서도.1 is a flowchart illustrating a method of compensating reception power for each frequency of a mobile communication terminal according to the present invention.
본 발명은 이동 통신 단말기의 수신부 채널(1011CH ~ 779CH)간 수신 파워(Rx Power)의 편차를 줄이기 위해, 모든 단말기마다 주파수별 수신파워 보상 조정(Calibration)을 실행함으로써, 수신 파워(Rx Power)가 수신 복조단에 채널 별로 일정하게 입력 되도록 이득(AGC)을 조절하도록 함으로써, 종래 단말기마다 다르게 발생하는 채널간 수신 파워(Rx Power)의 편차를 줄일 수 있도록 하는 특징이 있다.According to the present invention, in order to reduce the deviation of Rx power between receiver channels 1011CH to 779CH of a mobile communication terminal, the reception power compensation is adjusted by performing frequency-specific received power compensation calibration for each terminal. By adjusting the gain (AGC) to be uniformly input to the reception demodulation stage for each channel, there is a feature that can reduce the variation in the received power (Rx Power) between channels that occur differently for each conventional terminal.
다시 말해, 종래에는 개발자가 다수개의 단말기에 대한 측정치의 평균 이득값(AGC)을 일률적으로 각 단말기의 주파수별 수신파워 보상 테이블에 적용함으로써, 단말기마다 수신부 성능에 많은 차이가 발생하는 문제점이 있던 것을 보완하기 위한 것으로, 본 발명에서는 각 단말기에 대해서 직접 주파수별 수신파워 보상을 빠르게 수행할 수 있도록 하는 방법을 그 요지로 하고 있다.In other words, in the related art, the developer uniformly applies the average gain value (AGC) of the measured values for a plurality of terminals to the reception power compensation table for each frequency of each terminal, thereby causing a large difference in receiver performance for each terminal. In order to supplement the present invention, a method for quickly performing frequency-specific reception power compensation for each terminal is provided.
이하, 본 발명의 바람직한 실시예를 첨부한 도면을 참조하여 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
도1은 본 발명에 의한 이동 통신 단말기의 주파수별 수신파워 보상 방법을 보인 순서도로서, 우선 단말기의 NV(Non Volatile) 메모리에서 각 주파수별보상값(AGC) 테이블을 초기화(Initialized Comp Table)하고(S101), 보상 조정할 파워 테이블 인덱스를 셋팅한다. 즉, 파워 번위(약, 25~104)를 N등분(16등분)하는 파워 테이블을 설정한다(S102).1 is a flowchart illustrating a method for compensating reception power for each frequency of a mobile communication terminal according to the present invention. First, each frequency compensation table (AGC) table is initialized in a nonvolatile memory (NV) of the terminal (Initialized Comp Table) ( S101), set a power table index to be adjusted. That is, a power table for dividing the power ranks (about 25 to 104 into N equals (16 equals)) is set (S102).
다음, 저잡음 증폭기(LNA : Low Noise Amplifier)의 상태를 체크하여 오프(off)되어 있을 경우 온(on)으로 셋팅한다(S103). 이상으로 주파수별 수신파워 보상을 위한 초기화 작업이 완료된다.Next, the state of the low noise amplifier (LNA) is checked and set to on if it is off (S103). This completes the initialization for receiving power compensation for each frequency.
다음, 상기 NV 메모리의 다른 영역으로부터 기준 채널의 파워에 해당하는 수신파워 조정값(Rx Calibration)을 읽어(S104), 수신파워 조정에 적용할 이득(AGC)값을 결정하고(S105), 조정(Calibration)할 채널을 설정(예:16개)한다(S106).Next, the received power adjustment value (Rx Calibration) corresponding to the power of the reference channel is read from another region of the NV memory (S104), and a gain (AGC) value to be applied to the received power adjustment is determined (S105), and the adjustment ( A channel to be calibrated is set (example: 16) (S106).
즉, 전체 주파수범위에서 대표적으로 N개(16개)의 채널을 설정하여, 기준 채널의 수신파워와 동일한 파워를 얻을 수 있는 만큼의 각 채널의 이득(AGC)값을 결정하기 위한 것이다.That is, by setting N (16) channels representatively in the entire frequency range, it is to determine the gain (AGC) value of each channel as much as obtain the same power as the reception power of the reference channel.
다음, 상기 기준 채널에 대한 수신 파워를 얻을 수 있는 이득(AGC)값을 중심으로 업 또는 다운하면서 동일한 수신 파워를 얻을 수 있는 값을 구하고(S107), 상기 기준 채널에 대한 이득 값과 조정 값과의 차이 값을 구한다(S108). 즉, 기준 채널에 대한 이득 값에 상기에서 구한 조정 값을 가감하여 각 채널에 대한 이득을 보상하는 것이다.Next, a value for obtaining the same reception power while obtaining the same reception power up or down around the gain (AGC) value for obtaining the reception power for the reference channel is obtained (S107), and the gain value and the adjustment value for the reference channel and The difference value of is obtained (S108). That is, the gain for each channel is compensated by adding or subtracting the adjustment value obtained above to the gain value for the reference channel.
상기 기준 채널에 대하여 수신파워를 보정할 채널의 이득 값을 구하는 과정은 설정된 채널의 수(예:16개) 만큼 계속 반복하여(S109), 그 보정 값을 상기 주파수별 보상 테이블에 매핑하고, 그 대표 주파수 채널의 사이 값에 대해서는선형(Linear)화하여 보상을 한다(S110).The process of obtaining a gain value of a channel for correcting reception power with respect to the reference channel is repeated as many times as the set number of channels (e.g., 16) (S109), and the correction value is mapped to the frequency-specific compensation table. Values between the representative frequency channels are compensated by linearization (S110).
마지막으로, 상기 선형화를 포함한 모든 주파수 채널에 대해서 수신파워 조정 값이 구해졌는지 확인되면(S111), 그 조정 값들을 NV 메모리에 라이팅(Writing) 한다(S112).Finally, if the received power adjustment value is obtained for all frequency channels including the linearization (S111), the adjustment values are written to the NV memory (S112).
이상으로, 본 발명은 각 단말기에 대해서 주파수별 수신파워 보상을 수행하게 됨으로써, 각 단말기의 채널간(1011CH ~ 779CH) 수신부의 파워에 따른 수신 이득(Rx AGC)값의 편차를 보상할 수 있게 됨으로써, 채널간 수신부 성능의 편차를 줄일 수 있게 된다.As described above, the present invention performs the reception power compensation for each terminal for each terminal, thereby compensating for the variation in the reception gain (Rx AGC) value according to the power of the receivers between the channels 1011CH to 779CH of each terminal. Therefore, the variation of the performance of the receiver between channels can be reduced.
이상에서 설명한 바와 같이 본 발명 이동 통신 단말기의 주파수별 수신파워 보상 방법은, 소프트웨어적으로 주파수별 수신파워 보상을 실행함으로써 다수의 단말기에 대하여 수신부의 채널간 수신파워의 편차를 보상할 수 있도록 하는 효과가 있다.As described above, the frequency-received power compensation method of the mobile communication terminal of the present invention has the effect of compensating for the variation of the reception power between channels of the receiver for a plurality of terminals by performing the frequency-received power compensation by software. There is.
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KR100483287B1 (en) * | 2003-04-25 | 2005-04-15 | 엘지전자 주식회사 | Average power level search apparatus and method in system using multi look up table |
US8081712B2 (en) | 2007-02-02 | 2011-12-20 | Interdigital Technology Corporation | Method and apparatus for mapping of absolute power grant values in wireless communications |
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CN101203039B (en) * | 2006-12-15 | 2011-07-06 | 华为技术有限公司 | Method, apparatus and network for system initiation of wireless area network |
CN101369835B (en) * | 2008-10-14 | 2013-04-24 | 华为终端有限公司 | Gain compensation method and device of wireless terminal |
CN102324991B (en) * | 2011-08-16 | 2013-11-06 | 惠州Tcl移动通信有限公司 | Method for calibrating mobile terminal to transmit power in global system for mobile communication (GSM) frequency band |
CN110290578B (en) * | 2018-03-19 | 2021-09-03 | 大唐移动通信设备有限公司 | Method and terminal for acquiring noise power |
CN112996036B (en) * | 2021-02-25 | 2022-07-12 | 展讯通信(深圳)有限公司 | AGC calibration preprocessing method and device, storage medium and terminal |
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US5497419A (en) * | 1994-04-19 | 1996-03-05 | Prima Facie, Inc. | Method and apparatus for recording sensor data |
CN1154385A (en) * | 1995-11-06 | 1997-07-16 | 伊西康公司 | Polymer blends containing polyoxaesters |
KR100223369B1 (en) * | 1996-12-19 | 1999-10-15 | 윤종용 | Apparatus and method for automatically contwlling gain in multic-channel communication system |
KR100208942B1 (en) * | 1997-01-20 | 1999-07-15 | 윤종용 | Method and apparatus for power estimation of received signal in a cdma communication system |
KR100342536B1 (en) * | 1999-12-20 | 2002-06-28 | 윤종용 | Apparatus for compensating received signal strength indicator according to temperature and method thereof |
US6388526B1 (en) * | 2000-07-06 | 2002-05-14 | Lucent Technologies Inc. | Methods and apparatus for high performance reception of radio frequency communication signals |
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KR100483287B1 (en) * | 2003-04-25 | 2005-04-15 | 엘지전자 주식회사 | Average power level search apparatus and method in system using multi look up table |
US8081712B2 (en) | 2007-02-02 | 2011-12-20 | Interdigital Technology Corporation | Method and apparatus for mapping of absolute power grant values in wireless communications |
US8724737B2 (en) | 2007-02-02 | 2014-05-13 | Interdigital Technology Corporation | Method and apparatus for mapping of absolute power grant values in wireless communications |
US9185708B2 (en) | 2007-02-02 | 2015-11-10 | Interdigital Technology Corporation | Method and apparatus for mapping of absolute power grant values in wireless communications |
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CN100417239C (en) | 2008-09-03 |
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