KR970063981A - Apparatus and method for measuring signal-to-interference ratio for a received signal in a code division multiple access system - Google Patents

Apparatus and method for measuring signal-to-interference ratio for a received signal in a code division multiple access system Download PDF

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KR970063981A
KR970063981A KR1019960002778A KR19960002778A KR970063981A KR 970063981 A KR970063981 A KR 970063981A KR 1019960002778 A KR1019960002778 A KR 1019960002778A KR 19960002778 A KR19960002778 A KR 19960002778A KR 970063981 A KR970063981 A KR 970063981A
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South Korea
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signal
power
interference ratio
unit
measuring
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KR1019960002778A
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KR0162978B1 (en
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김동호
최안나
홍인기
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서정욱
한국이동통신 주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception

Abstract

본 발명은 코드분할 다중 접속 시스템(CDMA)을 채용한 이동 통신 환경에서 수신 신호의 신호 대 간섭비(SIR)를 측정하는 장치 및 그 방법에 관한 것으로, 신호를 수신하여 역확산한 후에 이동체의 최대 도플러 주기에 가까운 값으로 적분을 수행하여 간섭 성분이 제거된 신호 성분의 크기를 구한 다음에 심볼 단위로 적분한 신호의 평균 전력 크기에서 도플러 주기만큼 적분한 신호의 전력 크기를 감하여 간섭 신호의 전력 크기를 구하여 신호 대 간섭비를 구함으로써, 고가의 정밀한 자동 이동 이득 제어기를 사용하지 않고도 보다 정확한 신호 대 간섭비를 측정할 수 있으므로 수신기 비용을 절감할 수 있는 경제적인 효과가 있고, 또한 본 발명을 전력 제어에 적용하면 단순한 수신 신호 전력 기준의 전력 제어보다 신호 대 간섭비 기준의 전럭 제어를 수행할 수 있어 시스템의 성능을 향상시킬 수 있는 효과가 있다.The present invention relates to an apparatus and method for measuring a signal-to-interference ratio (SIR) of a received signal in a mobile communication environment employing a code division multiple access system (CDMA) Doppler period is integrated to obtain the magnitude of the signal component from which the interference component has been removed, and then the power magnitude of the signal integrated by the Doppler period is subtracted from the average power magnitude of the signal integrated in the symbol unit, The signal-to-interference ratio can be obtained. Therefore, it is possible to measure the signal-to-interference ratio more precisely without using the expensive and precise automatic movement gain controller, thereby reducing the cost of the receiver. When applied to the control, the signal-to-interference ratio reference control is performed rather than the simple power control based on the received signal power It may be effective to improve the performance of the system.

Description

코드 분할 다중 접속 시스템에서 수신 신호에 대한 신호 대 간섭비 측정 장치 및 그 방법Apparatus and method for measuring signal-to-interference ratio for a received signal in a code division multiple access system

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제2도는 본 발명의 일실시예에 따른 신호 대 간섭비 측정 장치의 구조도.FIG. 2 is a schematic diagram of a signal to interference ratio measurement apparatus according to an embodiment of the present invention; FIG.

제3도는 본 발명의 일실시예에 따른 흐름도.3 is a flow diagram according to an embodiment of the present invention.

제4도는 본 발명에 의해 측정된 신호 대 간섭비의 실험 결과 그래프.FIG. 4 is a graph of the experimental result of the signal-to-interference ratio measured by the present invention.

Claims (5)

송신단으로부터 파일럿 신호를 수신하여 외부로부터 입력되는 직교 부호에 따라 역확산을 수행하는 역확산 변조 수단(201); 상기 역확산 변조 수단(201)으로부터 역확산된신호를 입력받아 변조 심볼단위로 적분을 수행하는 적분 방전 필터링 수단(202); 상기 적분 방전 필터링 수단(202);으로부터 변조 심볼 단위로 적분한 값을 입력받아 심볼 단위로 전력을 측정하는 심볼 단위 전력 측정 수단(203); 상기 심볼 단위 전력 측정 수단(203)의 출력을 입력받아 소정 시간 동안 평균 수신 전력값을 계산하는 평균 연산수단(204); 상기 적분 방전 필터링 수단(202)으로부터 변조 심볼 단위로 적분한 값을 입력받아 상기 소정 시간동안 적분을 수행하는 이동 평균 연산 수단(205); 상기 이동 평균 연산수단(205)의 출력을 입력받아 측정 구간 전력을 계산하여 신호성분만의 전력을 구하는 측정 구간 전력 측정 수단(206) 및 상기 평균 연산 수단(204)으로부터 평균 수신전력을 입력받고 상기 측정 구간 전력 측정 수단(206)으로 부터 신호만의 전력을 입력받아 평균 수신 전력에서 신호만의 전력을 감하여 간섭 신호 전력을 구한 후에 신호만의 전력을 간섭 신호 전력으로 나누어 수신 신호에 대한 신호 대 간섭비를 구하는 신호 대 간섭비 연산 수단(207)을 구비하는 것을 특징으로 하는 신호 대 간섭비 측정장치.Despreading modulation means (201) for receiving a pilot signal from a transmitter and performing despreading according to an orthogonal code inputted from the outside; Integrated discharge filtering means 202 for receiving a despread signal from the despreading modulation means 201 and performing integration on a modulation symbol basis; A symbol unit power measurement unit 203 for receiving a value integrated on a modulation symbol basis from the integral discharge filtering unit 202 and measuring power on a symbol basis; An average calculation unit 204 for receiving an output of the symbol unit power measuring unit 203 and calculating an average received power value for a predetermined time; A moving average calculation unit 205 for receiving a value integrated from the integral discharge filtering unit 202 in units of modulation symbols and performing integration for the predetermined time; A measurement interval power measurement unit 206 that receives the output of the moving average calculation unit 205 and calculates power of a measurement interval to obtain power of only a signal component; The power of only the signal from the measurement interval power measuring means 206 is received, the power of only the signal is subtracted from the average received power to obtain the interference signal power, and then the power of only the signal is divided by the interference signal power, And a signal-to-interference ratio calculation means (207) for calculating a signal to interference ratio measurement means (207). 제1항에 있어서, 상기 소정 시간은, 페이딩 채널의 상관 시간 미만은 것을 특징으로 하는 신호 대 간섭비 측정장치.2. The apparatus of claim 1, wherein the predetermined time is less than a correlation time of a fading channel. 제1항에 있어서, 상기 신호 대 간섭비 연산수단(207)은, 계산된 신호대 간섭비의 값을 역방향 폐루프 전력 제어를 수행하도록 출력하는 것을 특징으로 하는 신호 대 간섭비 측정장치.2. The apparatus of claim 1, wherein the signal-to-interference ratio calculation means (207) outputs the calculated signal-to-interference ratio value to perform reverse closed-loop power control. 코드분할 다중접속접속시스템에서 수신신호에 대한 신호 대 간섭비 측정 장치에 적용되는 신호 대 간섭비 측정 방법에 있어서, 송신단으로부터 파일럿 신호를 수신하면 송신단에서 사용한 직교 부호에 따라 역확산을 수행한 후에 심볼 단위로 적분을 수행하는 제1단계(301내지303); 상기 제1단계(301내지303)를 수행한 후에 심볼 단위로 전력을 측정하고, 소정 시간동안 평균 수신 전력값을 계산하는 제2단계(306,307); 상기 제1단계(301 내지303)를 수행한 후에 변조 심볼 단위로 적분한 값을 상기 소정 시간동안 적분을 수행하고, 측정 구간 전력을 계산하여 신호 성분만의 전력을 구하는 제3단계(304,305); 및 상기 제2단계(360,307)와 제3단계(304,305)를 수행한 후에 평균 수신 전력에서 신호만의 전력을 감하여 간섭 신호 전력을 구한 다음에 신호만의 전력을 간섭 신호 전력으로 나누어 수신 신호에 대한 신호 대 간섭비를 구하는 제4단계(308,309)를 포함하는 것을 특징으로하는 신호 대 간섭비 측정방법.A method for measuring a signal-to-interference ratio applied to an apparatus for measuring a signal-to-interference ratio of a received signal in a code division multiple access access system, the method comprising: receiving a pilot signal from a transmitting terminal; performing despreading according to an orthogonal code used in the transmitting terminal; A first step (301 to 303) for performing integration in units of a unit; A second step (306, 307) of measuring the power on a symbol-by-symbol basis after calculating the first step (301 to 303) and calculating an average received power value for a predetermined time; A third step (304,305) of integrating a value obtained by integrating the modulation symbol unit after performing the first step (301 to 303) for the predetermined time, and calculating power of a measurement interval to obtain power of only a signal component; And performing the second and third steps 360 and 307 and the third and the third steps 304 and 305. Thereafter, the power of only the signal is subtracted from the average received power to obtain the interference signal power, and then the power of only the signal is divided by the interference signal power, And a fourth step (308,309) of obtaining a signal-to-interference ratio. 제4항에 있어서, 상기 소정 시간은, 페이딩 채널의 상관 시간 미만인 것을 특징으로 하는 신호 대 간섭비 측정방법.5. The method of claim 4, wherein the predetermined time is less than a correlation time of a fading channel. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960002778A 1996-02-06 1996-02-06 Apparatus and method of measuring sir of received signal in cdma system KR0162978B1 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990023276A (en) * 1997-08-05 1999-03-25 이데이 노부유끼 Receiver, wireless communication system and communication method
KR100348191B1 (en) * 1998-06-13 2002-08-09 삼성전자 주식회사 Apparatus and method for measuring non-orthogonal noise in cdma communication system
KR100371294B1 (en) * 1999-12-01 2003-02-07 닛본 덴기 가부시끼가이샤 Cdma transmission power control in variable control cycle
KR100407126B1 (en) * 2001-03-27 2003-11-28 삼성전자주식회사 Apparatus and method for measuring signal to interference ratio, receiver equipped with the same apparatus
KR100413096B1 (en) * 2000-04-06 2003-12-31 가부시키가이샤 엔.티.티.도코모 Apparatus and method for measurement of communication quality in cdma system
KR100827099B1 (en) * 2005-03-30 2008-05-02 삼성전자주식회사 Apparatus and method for estimating carrier to interference noise ratio in an orthogonal frequency division multiple system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100421413B1 (en) * 2001-11-05 2004-03-09 한국전자통신연구원 Method and Apparatus for Measurement of SIR(Signal to Interference Ratio) using Partitioned Despreading of Pilot Symbol in CDMA System

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990023276A (en) * 1997-08-05 1999-03-25 이데이 노부유끼 Receiver, wireless communication system and communication method
KR100348191B1 (en) * 1998-06-13 2002-08-09 삼성전자 주식회사 Apparatus and method for measuring non-orthogonal noise in cdma communication system
KR100371294B1 (en) * 1999-12-01 2003-02-07 닛본 덴기 가부시끼가이샤 Cdma transmission power control in variable control cycle
KR100413096B1 (en) * 2000-04-06 2003-12-31 가부시키가이샤 엔.티.티.도코모 Apparatus and method for measurement of communication quality in cdma system
KR100407126B1 (en) * 2001-03-27 2003-11-28 삼성전자주식회사 Apparatus and method for measuring signal to interference ratio, receiver equipped with the same apparatus
KR100827099B1 (en) * 2005-03-30 2008-05-02 삼성전자주식회사 Apparatus and method for estimating carrier to interference noise ratio in an orthogonal frequency division multiple system
US8130878B2 (en) 2005-03-30 2012-03-06 Samsung Electronics Co., Ltd. Apparatus and method for estimating carrier-to-interference-and-noise ratio in an orthogonal frequency division multiplexing system

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