KR100459433B1 - Method for compensating power of mobile communication device - Google Patents
Method for compensating power of mobile communication device Download PDFInfo
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- KR100459433B1 KR100459433B1 KR10-2002-0049523A KR20020049523A KR100459433B1 KR 100459433 B1 KR100459433 B1 KR 100459433B1 KR 20020049523 A KR20020049523 A KR 20020049523A KR 100459433 B1 KR100459433 B1 KR 100459433B1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
Abstract
본 발명은 이동 통신 단말기의 온도 변화에 따른 PAM의 최대 출력값(Pout(T))과 원하는 최대 출력값(Pc)의 차에 의해 보정값을 산출하여 저장해 두었다가, 실제 동작 시 온도 보정값에 따라 PAM(Power Amp Module)을 제어함으로써, 온도에 영향을 받지 않고 일정한 출력을 얻을 수 있도록 하는 이동 통신 단말기의 송신출력 보상 방법에 관한 것으로, 각 온도에 대한 단말의 최대 출력값(Pout(T))과 PAM(Power Amp Module)의 입력전력(Pin_c)를 측정하고, 원하는 최대 출력값(Pc)을 설정하는 제1단계와; 상기 최대 출력값(Pout(T))과 원하는 최대 출력값(Pc)의 차(Pc - Pout(T))로 보정값(Padj(T))을 구하는 제2단계와; 상기와 같이 구한 각 온도(T)에 대한 보정값(Padj(T))을 내부 메모리에 저장하는 제3단계와; 단말기 동작시 내부온도(T)를 측정하고, 그 측정된 온도에서의 PAM의 최대 출력값과 원하는 최대 출력값의 차이에 해당하는 보정값(Padj(T))을 내부 메모리에서 인출하는 제4단계와; 상기 인출된 보정값(Padj(T))을 입력전력(Pin_c)에 더하여 PAM의 제어전압으로 인가하는 제5단계를 포함하여 이루어짐으로써 달성할 수 있다.According to the present invention, a correction value is calculated and stored according to a difference between a maximum output value Pout (T) of a PAM according to a temperature change of a mobile communication terminal and a desired maximum output value Pc. The present invention relates to a method of compensating transmission output of a mobile communication terminal to obtain a constant output without being influenced by temperature by controlling a power amp module. The terminal output power Pout (T) and PAM ( A first step of measuring an input power Pin_c of the power amp module and setting a desired maximum output value Pc; Obtaining a correction value Padj (T) by the difference Pc-Pout (T) between the maximum output value Pout (T) and the desired maximum output value Pc; A third step of storing the correction value Padj (T) for each temperature T obtained as described above in an internal memory; A fourth step of measuring an internal temperature T during operation of the terminal and extracting a correction value Padj (T) corresponding to a difference between the maximum output value of the PAM and the desired maximum output value at the measured temperature from the internal memory; And the fifth step of applying the extracted correction value Padj (T) to the control voltage of the PAM in addition to the input power Pin_c.
Description
본 발명은 이동 통신 단말기의 송신출력 보상 방법에 관한 것으로, 특히 이동 통신 단말기의 온도 변화에 따른 PAM의 최대 출력값(Pout(T))과 원하는 최대 출력값(Pc)의 차에 의해 보정값을 산출하여 저장해 두었다가, 실제 동작 시 온도 보정값에 따라 PAM(Power Amp Module)을 제어함으로써, 온도에 영향을 받지 않고 일정한 출력을 얻을 수 있도록 하는 이동 통신 단말기의 송신출력 보상 방법에 관한 것이다.The present invention relates to a transmission output compensation method of a mobile communication terminal. In particular, a correction value is calculated by a difference between a maximum output value Pout (T) of a PAM and a desired maximum output value Pc according to a temperature change of the mobile communication terminal. The present invention relates to a transmission output compensation method of a mobile communication terminal which stores and stores a constant output without being influenced by temperature by controlling a power amplifier module (PAM) according to a temperature correction value in actual operation.
대부분의 전자 제품이 그렇듯이, 이동 통신 단말기도 고온, 저온 등의 온도 변화에 따라 송신 출력이 변화되고 RF 성능이 저하됨으로써, 이동 통신 시스템에 악영향을 미치게 되는 문제점이 있다.As with most electronic products, a mobile communication terminal also has a problem in that a transmission output is changed according to a temperature change such as a high temperature and a low temperature, and an RF performance is deteriorated, thereby adversely affecting a mobile communication system.
따라서, 본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 창출한 것으로, 이동 통신 단말기의 온도 변화에 따른 PAM의 최대 출력값(Pout(T))과 원하는 최대 출력값(Pc)의 차에 의해 보정값을 산출하여 저장해 두었다가, 실제 동작 시 온도 보정값에 따라 PAM(Power Amp Module)을 제어함으로써, 온도에 영향을 받지 않고 일정한 출력을 얻을 수 있도록 하는 이동 통신 단말기의 송신출력 보상 방법을 제공함에 그 목적이 있다.Accordingly, the present invention was created to solve the above-mentioned conventional problems, and is corrected by the difference between the maximum output value Pout (T) of the PAM and the desired maximum output value Pc according to the temperature change of the mobile communication terminal. To calculate and store and store the PAM (Power Amp Module) according to the temperature correction value during the actual operation, to provide a transmission output compensation method of the mobile communication terminal to obtain a constant output without being affected by the temperature There is this.
이와 같은 목적을 달성하기 위한 본 발명은, 각 온도에 대한 단말의 최대 출력값(Pout(T))과 PAM(Power Amp Module)의 입력전력(Pin_c)를 측정하고, 원하는 최대 출력값(Pc)을 설정하는 제1단계와; 상기 최대 출력값(Pout(T))과 원하는 최대 출력값(Pc)의 차(Pc - Pout(T))로 보정값(Padj(T))을 구하는 제2단계와; 상기와 같이 구한 각 온도(T)에 대한 보정값(Padj(T))을 내부 메모리에 저장하는 제3단계와; 단말기 동작시 내부온도(T)를 측정하고, 그 측정된 온도에서의 PAM의 최대 출력값과 원하는 최대 출력값의 차이에 해당하는 보정값(Padj(T))을 내부 메모리에서 인출하는 제4단계와; 상기 인출된 보정값(Padj(T))을 입력전력(Pin_c)에 더하여 PAM의 제어전압으로 인가하는 제5단계를 포함하여 이루어진 것을 특징으로 한다.In order to achieve the above object, the present invention measures a maximum output value Pout (T) and an input power Pin_c of a PAM (Power Amp Module) for each temperature, and sets a desired maximum output value Pc. A first step of doing; Obtaining a correction value Padj (T) by the difference Pc-Pout (T) between the maximum output value Pout (T) and the desired maximum output value Pc; A third step of storing the correction value Padj (T) for each temperature T obtained as described above in an internal memory; A fourth step of measuring an internal temperature T during operation of the terminal and extracting a correction value Padj (T) corresponding to a difference between the maximum output value of the PAM and the desired maximum output value at the measured temperature from the internal memory; And a fifth step of applying the extracted correction value Padj (T) to the control voltage of the PAM in addition to the input power Pin_c.
도 1은 본 발명에 따른 이동 통신 단말기의 송신출력에 대한 온도보상의 개념을 보인 그래프.1 is a graph showing the concept of temperature compensation for the transmission output of the mobile communication terminal according to the present invention.
도 2는 본 발명에 따른 이동 통신 단말기의 송신출력 보상 과정을 설명하기 위한 단말기 내부의 구성을 보인 블록도.Figure 2 is a block diagram showing the internal structure of the terminal for explaining the transmission output compensation process of the mobile communication terminal according to the present invention.
이하, 본 발명의 바람직한 실시예를 첨부한 도면을 참조하여 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described.
먼저, 도1은 본 발명에 따른 이동 통신 단말기의 송신출력에 대한 온도보상의 개념을 보인 그래프로서, 원하는 출력값(Pc)에 대하여 동일한 제어전압을 인가했을 때, 단말기의 온도가 낮을 경우에 송신출력(Pout(T))은 최대가 되고, 그 온도에서의 보정값(Padj(T))은 최소가 된다.First, FIG. 1 is a graph showing a temperature compensation concept for a transmission output of a mobile communication terminal according to the present invention. When the same control voltage is applied to a desired output value Pc, the transmission output when the terminal temperature is low. (Pout (T)) becomes maximum, and the correction value Padj (T) at that temperature becomes minimum.
그리고, 적정한 온도에서는 인가되는 보정값(Padj(T))이 많지 않아도 송신출력(Pout(T))은 원하는 출력값(Pc)이 되고, 아주 높은 온도에서는 송신출력(Pout(T))이 떨어지기 때문에, 그 만큼 보정값(Padj(T))도 많아야 되는 것을 알 수 있다.And even if there is not much correction value Padj (T) applied at an appropriate temperature, the transmission output Pout (T) becomes a desired output value Pc, and the transmission output Pout (T) falls at a very high temperature. Therefore, it turns out that the correction value Padj (T) must also increase by that much.
즉, 온도에 따라 송신출력(Pout(T))이 증가하거나 감소하게 되고, 그에 따라 보정값(Padj(T))을 감소나 증가시켜야만 원하는 출력값(Pc)을 얻을 수 있게 되는 것이다.That is, the transmission output Pout (T) increases or decreases according to the temperature, and accordingly, the desired output value Pc can be obtained only by decreasing or increasing the correction value Padj (T).
본 발명은 크게 두 가지 과정을 거쳐 수행되는데, 도2의 단말기 내부의 구성 블록도를 참조하여 그 동작 과정을 설명한다.The present invention is largely carried out through two processes, the operation process of which will be described with reference to the block diagram of the inside of the terminal of FIG.
먼저, 첫 번째 과정으로 각 온도 변화에 대한 이동 통신 단말기의 최대 출력값(Pout(T))과 PAM(Power Amp Module)의 입력전력(Pin_c)를 측정하고, 원하는 최대 출력값(Pc)을 설정한다.First, as a first process, the maximum output value Pout (T) of the mobile communication terminal and the input power Pin_c of the PAM (Power Amp Module) for each temperature change are measured, and a desired maximum output value Pc is set.
다음, 하기의 수학식1과 같이 온도변화에 대한 최대 출력값(Pout(T))과 원하는 최대 출력값(Pc)의 차(Pc - Pout(T))로 보정값(Padj(T))을 구한다.Next, as shown in Equation 1 below, the correction value Padj (T) is obtained by the difference between the maximum output value Pout (T) and the desired maximum output value Pc (Pc-Pout (T)).
상기와 같이 구한 각 온도(T)에 대한 보정값(Padj(T))을 내부 메모리에 저장한다.The correction value Paddj (T) for each temperature T obtained as described above is stored in the internal memory.
다음, 두 번째 과정으로 실제 단말기 동작시 단말기 CPU는 온도센서(써미스터 등)를 통해 단말기 내부온도(T)를 측정하고, 수학식2와 같이 측정된 온도에 따른 보정값(Padj(T))을 입력전력(Pin_c)에 더하여 PAM의 제어전압으로 인가한다.Next, in the second process, the terminal CPU measures the internal temperature T of the terminal through a temperature sensor (thermistor, etc.), and adjusts the correction value Padj (T) according to the measured temperature as shown in Equation 2 below. In addition to the input power (Pin_c) is applied to the control voltage of the PAM.
이때, Pout = Pin(T) + G(T)At this time, Pout = Pin (T) + G (T)
= Pin_c + Padj(T) + G(T)= Pin_c + Padj (T) + G (T)
= Pout(T) + Padj(T) = Pc로 되어 원하는 출력을 얻을 수 있다.= Pout (T) + Padj (T) = Pc to get the desired output.
여기서, Pc는 원하는(설정된) PAM의 출력 전력값, Pout(T)는 온도변화에 따른 출력값, Padj(T)는 온도 변화에 따른 보정값, Pin(T)는 온도 변화에 따른 PAM의 입력전력, G(T)는 온도변화에 따른 PAM의 이득(gain), Pin_c는 원하는(설정된) PAM의 입력 전력값을 나타낸다.Here, Pc is the output power value of the desired (set) PAM, Pout (T) is the output value according to the temperature change, Padj (T) is the correction value according to the temperature change, Pin (T) is the input power of the PAM according to the temperature change , G (T) represents the gain of the PAM according to the temperature change, Pin_c represents the input power value of the desired (set) PAM.
이상에서 설명한 바와 같이 본 발명 이동 통신 단말기의 송신출력 보상 방법은 이동 통신 단말기의 온도 변화에 따른 PAM의 최대 출력값(Pout(T))과 원하는 최대 출력값(Pc)의 차에 의해 보정값을 산출하여 저장해 두었다가, 실제 동작 시 온도 보정값에 따라 PAM(Power Amp Module)을 제어함으로써, 온도에 영향을 받지 않고 일정한 출력을 얻을 수 있도록 하는 효과가 있다.As described above, in the transmission output compensation method of the mobile communication terminal, the correction value is calculated by the difference between the maximum output value Pout (T) of the PAM and the desired maximum output value Pc according to the temperature change of the mobile communication terminal. After storing, by controlling the power amplifier module (PAM) according to the temperature correction value in actual operation, it is effective to obtain a constant output without being affected by the temperature.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10107653A (en) * | 1996-09-30 | 1998-04-24 | Toshiba Corp | Transmission power control method and its device for radio communication equipment |
| JPH11220410A (en) * | 1997-10-10 | 1999-08-10 | Motorola Inc | Rf transmitter with temperature compensated output power level control circuit and temperature compensation method |
| JP2000165261A (en) * | 1998-11-20 | 2000-06-16 | Kenwood Corp | Transmission output control circuit for radio communication terminal |
| EP1026822A2 (en) * | 1999-02-03 | 2000-08-09 | Nokia Mobile Phones Ltd. | A method and an arrangement for compensating the temperature drift of a detector and a control signal in periodic control |
| KR20000060876A (en) * | 1999-03-20 | 2000-10-16 | 윤종용 | Improved temperature compensation algorithm for power controlling in wireless telephone set |
| KR20010084741A (en) * | 2000-02-29 | 2001-09-06 | 박희석 | Vinyl sack production apparatus and using method thereof |
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- 2002-08-21 KR KR10-2002-0049523A patent/KR100459433B1/en not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10107653A (en) * | 1996-09-30 | 1998-04-24 | Toshiba Corp | Transmission power control method and its device for radio communication equipment |
| JPH11220410A (en) * | 1997-10-10 | 1999-08-10 | Motorola Inc | Rf transmitter with temperature compensated output power level control circuit and temperature compensation method |
| JP2000165261A (en) * | 1998-11-20 | 2000-06-16 | Kenwood Corp | Transmission output control circuit for radio communication terminal |
| EP1026822A2 (en) * | 1999-02-03 | 2000-08-09 | Nokia Mobile Phones Ltd. | A method and an arrangement for compensating the temperature drift of a detector and a control signal in periodic control |
| KR20000060876A (en) * | 1999-03-20 | 2000-10-16 | 윤종용 | Improved temperature compensation algorithm for power controlling in wireless telephone set |
| KR20010084741A (en) * | 2000-02-29 | 2001-09-06 | 박희석 | Vinyl sack production apparatus and using method thereof |
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