KR100531839B1 - Receive deflection correction method of cdma terminal - Google Patents
Receive deflection correction method of cdma terminal Download PDFInfo
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- KR100531839B1 KR100531839B1 KR10-2001-0058315A KR20010058315A KR100531839B1 KR 100531839 B1 KR100531839 B1 KR 100531839B1 KR 20010058315 A KR20010058315 A KR 20010058315A KR 100531839 B1 KR100531839 B1 KR 100531839B1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/109—Means associated with receiver for limiting or suppressing noise or interference by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/12—Neutralising, balancing, or compensation arrangements
Abstract
본 발명은 씨디엠에이 단말기의 수신 편차 보정 방법에 관한 것으로, 특히 저잡음증폭기를 온/오프시켜 오프셋값을 연산한후, 그 오프셋값을 이용하여 수신전력 레벨을 일정하게 유지하도록 한 씨디엠에이 단말기의 수신편차 보정방법에 관한 것이다. 이를 위하여 본 발명은 저잡음증폭기를 온 또는 오프시키기 위한 기준 수신전력 레벨을 설정하는 제1 과정과; 수신전력의 레벨을 검출하고, 그 수신전력의 레벨을 상기 기준 수신전력 레벨과 비교하는 제2 과정과; 상기 제2 과정의 비교결과, 상기 수신전력의 레벨이 기준 수신전력 레벨과 일치하거나 크면, 저잡음증폭기를 온시켜 수신전력의 레벨에 따른 이득조정값을 연산하는 제3 과정과; 상기 제2 과정의 비교결과, 상기 수신전력의 레벨이 기준 수신전력 레벨보다 작으면, 저잡음증폭기를 오프시켜 상기 수신전력의 레벨에 따른 이득조정값을 연산하는 제4 과정으로 수행한다.The present invention relates to a method for correcting a reception deviation of a CD-A terminal. In particular, a low-noise amplifier is turned on / off to calculate an offset value, and then the CD-A terminal is configured to maintain a constant reception power level using the offset value. The present invention relates to a method for correcting a reception deviation of a signal. To this end, the present invention includes a first process of setting a reference reception power level for turning on or off a low noise amplifier; Detecting a level of received power and comparing the received power level with the reference received power level; A third step of calculating a gain adjustment value according to the level of the received power by turning on a low noise amplifier if the level of the received power is equal to or greater than a reference received power level as a result of the comparison of the second step; As a result of the comparison of the second process, if the level of the received power is less than the reference receive power level, the fourth step is performed to calculate a gain adjustment value according to the level of the received power by turning off the low noise amplifier.
Description
본 발명은 씨디엠에이 단말기의 수신 편차 보정 방법에 관한 것으로, 특히 저잡음증폭기를 온/오프시켜 오프셋값을 연산한후, 그 오프셋값을 이용하여 수신전력 레벨을 일정하게 유지하도록 한 씨디엠에에 단말기의 수신편차 보정방법에 관한 것이다.The present invention relates to a method for correcting a reception deviation of a CD-A terminal, and in particular, to calculate a offset value by turning on / off a low-noise amplifier, and to use the offset value to maintain a constant reception power level. The present invention relates to a method for correcting a reception deviation of a terminal.
기지국으로부터 송출된 전력은, 여러가지 요인으로 인하여, 단말기에서 수신된 수신전력의 레벨이 일정하지 않게 된다.The power transmitted from the base station does not have a constant level of the received power received by the terminal due to various factors.
이러한, 수신전력 레벨을 씨디엠에이 단말기의 수신단에 일정하게 입력되도록 이득을 조절하기 위하여, 수신 편차 보정(Calibration)을 수행한다.In order to adjust the gain such that the reception power level is constantly input to the receiving terminal of the CD terminal, a reception deviation correction is performed.
씨디엠에이 단말기의 경우, 수신부 성능 테스트중에 IMD라는 항목이 있는데,이 항목은 IIP3에 영향을 많이 받게 되어, 저잡음증폭기가 온되어 있으면, 수신단에서 IIP3가 낮아 IMD테스트시 민감도가 상당히 저하된다.In the case of the CD-A terminal, there is an item called IMD during the performance test of the receiver. The item is affected by IIP3, and if the low noise amplifier is turned on, the IIP3 is low at the receiver and the sensitivity is significantly reduced during the IMD test.
이에 따라, 하드웨어적으로 강제로 저잡음증폭기를 오프시켜, IIP3를 증가시킨다.Accordingly, the low noise amplifier is forcibly turned off in hardware, thereby increasing IIP3.
이때, 종래에는, 수신부에서 저잡음증폭기가 온되었을 경우에만, 수신편차 보정을 수행하기 때문에, 저잡음증폭기의 오프시, 상기 저잡음증폭기가 온되었을 경우에 검출한 오프셋값을 일률적으로 적용하게 된다.In this case, conventionally, since the reception deviation correction is performed only when the low noise amplifier is turned on in the receiver, the offset value detected when the low noise amplifier is turned on is applied uniformly when the low noise amplifier is turned off.
이로 인해, 상기 저잡음증폭기의 오프시, 저잡음증폭기가 온되는 경우에 검출한 오프셋값을 이용하여 수신편차보정을 수행하므로, 수신부 부품의 편차에 의한 시료별 성능의 저하를 방지하지 못하는 문제점이 있다. For this reason, since the reception deviation correction is performed by using the offset value detected when the low noise amplifier is turned off and the low noise amplifier is turned on, there is a problem in that it is not possible to prevent degradation of performance for each sample due to variation of the receiver part.
본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로, 저잡음증폭기를 온/오프시켜 오프셋값을 연산한후, 그 오프셋값을 이용하여 수신전력 레벨을 일정하게 유지하도록 한 씨디엠에에 단말기의 수신편차 보정방법을 제공함에 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and calculates an offset value by turning on / off a low noise amplifier, and then uses the offset value to maintain a constant level of the received power of the terminal. It is an object of the present invention to provide a method for correcting a reception deviation.
상기와 같은 목적을 달성하기 위한 본 발명은, 저잡음증폭기를 온 또는 오프시키기 위한 기준 수신전력 레벨을 설정하는 제1 과정과; 수신전력의 레벨을 검출하고, 그 수신전력의 레벨을 상기 기준 수신전력 레벨과 비교하는 제2 과정과; 상기 제2 과정의 비교결과, 상기 수신전력의 레벨이 기준 수신전력 레벨과 일치하거나 크면, 저잡음증폭기를 온시켜 수신전력의 레벨에 따른 이득조정값을 연산하는 제3 과정과; 상기 제2 과정의 비교결과, 상기 수신전력의 레벨이 기준 수신전력 레벨보다 작으면, 저잡음증폭기를 오프시켜 상기 수신전력의 레벨에 따른 이득조정값을 연산하는 제4 과정을 수행함을 특징으로 한다.The present invention for achieving the above object comprises a first step of setting a reference reception power level for turning on or off the low noise amplifier; Detecting a level of received power and comparing the received power level with the reference received power level; A third step of calculating a gain adjustment value according to the level of the received power by turning on a low noise amplifier if the level of the received power is equal to or greater than a reference received power level as a result of the comparison of the second step; As a result of the comparison of the second process, if the level of the received power is less than the reference receive power level, a fourth process of calculating a gain adjustment value according to the level of the received power is performed by turning off the low noise amplifier.
이하, 본 발명에 의한 씨디엠에이 단말기의 수신 편차 보정 방법에 대한 작용 및 효과를 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, the operation and effects of the reception deviation correction method of the CD terminal according to the present invention will be described in detail.
도2는 본 발명 씨디엠에이 단말기의 수신 편차 보정 방법에 대한 동작흐름도로서, 이에 도시한 바와같이 저잡음증폭기의 온 또는 오프시키기 위한 기준 수신전력 레벨을 설정하는 제1 과정(SP1)과; 수신전력의 레벨을 검출하여 이를 기준 수신전력 레벨과 비교하는 제2 과정(SP2,SP3)과; 상기 제2 과정의 비교결과, 수신전력의 레벨이 기준 수신전력 레벨과 일치하거나 크면, 저잡음증폭기를 온시킨후, 수신전력의 레벨에 따른 이득조정값을 연산하는 제3 과정(SP4,SP6)과; 상기 제2 과정의 비교결과, 수신전력의 레벨이 기준 수신전력 레벨보다 작으면, 저잡음증폭기를 오프시킨후, 수신전력의 레벨에 따른 이득조정값을 연산하는 제4 과정(SP5,SP6)으로 이루어지며, 이와같은 본 발명의 동작을 설명한다.FIG. 2 is a flowchart illustrating a method for correcting a reception deviation of a CD-A terminal of the present invention, and as shown therein, a first step SP1 of setting a reference reception power level for turning on or off a low noise amplifier; A second process (SP2, SP3) for detecting the level of the received power and comparing it with the reference received power level; As a result of the comparison of the second process, if the level of the received power is equal to or greater than the reference received power level, after turning on the low noise amplifier, the third process (SP4, SP6) and calculating a gain adjustment value according to the level of the received power; ; As a result of the comparison of the second process, if the level of the received power is less than the reference receive power level, the fourth step (SP5, SP6) of turning off the low noise amplifier and calculating a gain adjustment value according to the level of the received power This operation of the present invention will be described.
먼저, 사용자에 의해, 씨디엠에이 단말기의 수신 안테나에 소정 레벨의 수신전력이 입력될 때, 저잡음증폭기를 온시키기 위한, 기준수신 전력레벨을 설정한다 (SP1).First, when a predetermined level of reception power is input to the receiving antenna of the CD terminal by the user, a reference reception power level is set for turning on the low noise amplifier (SP1).
그 다음, 현재 입력되는 수신전력 레벨을 상기 기준 수신 전력레벨과 비교한다(SP2,SP3).Next, the received power level is compared with the reference received power level (SP2, SP3).
그 비교결과, 현재 입력되는 수신전력 레벨이 상기 기준수신 전력레벨 이하의 값이면, 저잡음 증폭기를 오프시킨후(SP5), 수신편차 보정을 수행하기 위하여, 씨디엠에이 단말기의 수신 안테나를 통해 입력되는 수신전력의 레벨을 일정하게 유지하도록 하는 이득 조정값을 연산한다(SP6). As a result of the comparison, if the current input power level is less than or equal to the reference reception power level, the low noise amplifier is turned off (SP5) and then input through the receiving antenna of the CD terminal to perform reception deviation correction. A gain adjustment value is calculated to keep the level of the received power constant (SP6).
이후, 그 이득조정값을 오프셋값으로 저장한 다음, 그 이득 조정값을 이용하여 저잡음증폭기의 오프시에 입력되는 수신전력의 레벨을 일정하게 유지시킨다 (SP7).Thereafter, the gain adjustment value is stored as an offset value, and then the gain adjustment value is used to maintain a constant level of the received power input when the low noise amplifier is turned off (SP7).
한편, 상기 비교결과, 현재 입력되는 수신전력 레벨이 상기 기준수신 전력 레벨과 일치되면, 저잡음증폭기를 온시킨다(SP4).Meanwhile, as a result of the comparison, when the current input power level matches the reference reception power level, the low noise amplifier is turned on (SP4).
이때, 씨디엠에이 단말기의 수신부는, 트리거 방식으로 동작해야 하므로, 기준 수신전력 레벨에서의 PDM(POWER DENSITY MODULATION)값 미만의 전력을 공급하도록한후, 그 시점의 PDM값을 읽어들여 수신부가 정확하게 트리거 동작을 수행하도록 한다.At this time, since the receiver of the CD terminal should be operated in a triggered manner, after supplying power less than the PDM (POWER DENSITY MODULATION) value at the reference reception power level, the receiver is read correctly by reading the PDM value at that time. Perform a trigger action.
그 다음, 수신편차 보정을 수행하기 위하여, 씨디엠에이 단말기의 수신 안테나를 통해 입력되는 수신전력의 레벨을 일정하게 유지하도록 하는 이득 조정값을 연산한다(SP6). Next, in order to perform reception deviation correction, a gain adjustment value for calculating a constant level of the received power input through the receive antenna of the CD terminal is calculated (SP6).
이후, 그 이득조정값을 오프셋값으로 저장한 다음, 그 이득 조정값을 이용하여 저잡음증폭기의 오프시에 입력되는 수신전력의 레벨을 일정하게 유지시킨다 (SP7).Thereafter, the gain adjustment value is stored as an offset value, and then the gain adjustment value is used to keep the level of the received power input when the low noise amplifier is turned off (SP7).
보다 상세하게, 도2를 예를 들어 설명하면, 우선, 사용자에 의해, 씨디엠에이 단말기의 수신부의 안테나에 -60dBm의 전력이 들어올때, 저잡음증폭기를 온시킨다고 가정한다.More specifically, with reference to FIG. 2, first, it is assumed that the user turns on the low noise amplifier when power of -60dBm enters the antenna of the receiver of the CD terminal.
현재, 수신전력 레벨이 -60dBm 이하이면, 저잡음증폭기를 오프시킨후, 수신편차 보정을 수행하면 '1'과 같이 된다.Currently, when the reception power level is less than -60dBm, when the low noise amplifier is turned off and the reception deviation correction is performed, it becomes as '1'.
만약, 씨디엠에이 단말기의 수신 안테나를 통해 -60dBm의 전력이 들어오면, 저잡음증폭기를 온시키는데, 이때, 씨디엠에이 단말기의 수신부는 트리거 방식으로 동작하므로, -60dBm 미만의 전력을 공급하도록 하여, 그 -60dBm 미만에서의 PDM값을 읽어서 수신부가 정확하게 트리거 동작을 수행하도록 한다. If the power of -60dBm is received through the receive antenna of the CD terminal, the low noise amplifier is turned on. In this case, since the receiver of the CD terminal operates in a triggered manner, it supplies power of less than -60dBm. The PDM value is read below that -60dBm to allow the receiver to correctly trigger.
이후, 상기 저잡음 증폭기를 온시킨 상태에서, 기설정된 최대 수신전력까지 수신편차 보정을 수행하여 검출된 이득조정값을 비휘발성 데이터로 저장한다.Thereafter, in the state where the low noise amplifier is turned on, reception deviation correction is performed to a predetermined maximum reception power to store the detected gain adjustment value as nonvolatile data.
이때, 도2의 '4','5'는 저잡음증폭기가 온되었을 경우의 이득의 오프셋값을 나타내는데, 수신편차 보정 프로그램과 장비를 이용하여 자동으로 오프셋값을 찾기 때문에 시료별 편차를 없앨 수 있고, 오프셋값을 찾기 위해 소용되는 개발기간도 단축된다. In this case, '4' and '5' of FIG. 2 represent offset values of gain when the low noise amplifier is turned on. Since the offset values are automatically found by using the reception deviation correction program and the equipment, the deviation of each sample can be eliminated. In addition, the development period used to find the offset value is also shortened.
본 발명의 상세한 설명에서 행해진 구체적인 실시 양태 또는 실시예는 어디까지나 본 발명의 기술 내용을 명확하게 하기 위한 것으로, 이러한 구체적 실시예에 한정해서 협의로 해석해서는 안되며, 본 발명의 정신과 다음에 기재된 특허 청구의 범위내에서 여러가지 변경 실시가 가능한 것이다.Specific embodiments or examples made in the detailed description of the present invention are intended to clarify the technical contents of the present invention to the last, and should not be construed as limited to these specific embodiments by consultation, and the spirit of the present invention and the claims Various changes can be made within the scope of.
이상에서 상세히 설명한 바와같이 본 발명은, 씨디엠에이 단말기의 수신부에 대한 시료별 편차를 줄이기 위하여, 저잡음증폭기를 온/오프시켜 자동으로 오프셋값을 검출함으로써,시료별 수신 편차를 감소시킴과 아울러 씨디엠에이 단말기의 개발기간을 단축시키는 효과가 있다.As described in detail above, the present invention, in order to reduce the sample-by-sample variation of the receiver of the CD terminal, by detecting the offset value by automatically turning on / off the low-noise amplifier, while reducing the reception variation by sample It is effective to shorten the development period of the MS terminal.
도1은 본 발명 씨디엠에이 단말기의 수신편차 보정방법에 대한 동작흐름도.1 is a flowchart illustrating a method for correcting a reception deviation of a CD terminal of the present invention.
도2는 도1에 있어서, 이득조정값을 연산하는 모습을 보인도.FIG. 2 is a diagram showing a calculation of a gain adjustment value in FIG.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2001-0058315A KR100531839B1 (en) | 2001-09-20 | 2001-09-20 | Receive deflection correction method of cdma terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2001-0058315A KR100531839B1 (en) | 2001-09-20 | 2001-09-20 | Receive deflection correction method of cdma terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20030028614A KR20030028614A (en) | 2003-04-10 |
| KR100531839B1 true KR100531839B1 (en) | 2005-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR10-2001-0058315A KR100531839B1 (en) | 2001-09-20 | 2001-09-20 | Receive deflection correction method of cdma terminal |
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| KR (1) | KR100531839B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100713462B1 (en) * | 2004-10-21 | 2007-05-02 | 삼성전자주식회사 | Method for correcting offset of frequency in mobile terminal |
| KR101943310B1 (en) * | 2017-08-21 | 2019-01-29 | 주식회사 블루셀 | Tdd wireless transmitting/receiving apparatus with improved tx/rx isolation and system using the same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5469115A (en) * | 1994-04-28 | 1995-11-21 | Qualcomm Incorporated | Method and apparatus for automatic gain control in a digital receiver |
| WO1999029047A1 (en) * | 1996-09-30 | 1999-06-10 | Qualcomm Incorporated | Method and apparatus for increasing receiver immunity to interference |
| US6028855A (en) * | 1997-12-12 | 2000-02-22 | Philips Electronics North America Corp. | Circuit for synchronizing CDMA mobile phones |
| WO2001082511A2 (en) * | 2000-04-24 | 2001-11-01 | Telefonaktiebolaget Lm Ericsson (Publ) | Frequency selective rf output power calibration using digital and analog power measurements for use in a cellular telecommunications system |
| US6388526B1 (en) * | 2000-07-06 | 2002-05-14 | Lucent Technologies Inc. | Methods and apparatus for high performance reception of radio frequency communication signals |
-
2001
- 2001-09-20 KR KR10-2001-0058315A patent/KR100531839B1/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5469115A (en) * | 1994-04-28 | 1995-11-21 | Qualcomm Incorporated | Method and apparatus for automatic gain control in a digital receiver |
| WO1999029047A1 (en) * | 1996-09-30 | 1999-06-10 | Qualcomm Incorporated | Method and apparatus for increasing receiver immunity to interference |
| US6028855A (en) * | 1997-12-12 | 2000-02-22 | Philips Electronics North America Corp. | Circuit for synchronizing CDMA mobile phones |
| WO2001082511A2 (en) * | 2000-04-24 | 2001-11-01 | Telefonaktiebolaget Lm Ericsson (Publ) | Frequency selective rf output power calibration using digital and analog power measurements for use in a cellular telecommunications system |
| 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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|---|---|
| KR20030028614A (en) | 2003-04-10 |
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