KR960039731A - Variable frequency noise generator - Google Patents

Variable frequency noise generator Download PDF

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Publication number
KR960039731A
KR960039731A KR1019950008572A KR19950008572A KR960039731A KR 960039731 A KR960039731 A KR 960039731A KR 1019950008572 A KR1019950008572 A KR 1019950008572A KR 19950008572 A KR19950008572 A KR 19950008572A KR 960039731 A KR960039731 A KR 960039731A
Authority
KR
South Korea
Prior art keywords
noise
frequency
generator
noise generator
filter
Prior art date
Application number
KR1019950008572A
Other languages
Korean (ko)
Other versions
KR0150358B1 (en
Inventor
박용선
Original Assignee
김주용
현대전자산업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 김주용, 현대전자산업 주식회사 filed Critical 김주용
Priority to KR1019950008572A priority Critical patent/KR0150358B1/en
Publication of KR960039731A publication Critical patent/KR960039731A/en
Application granted granted Critical
Publication of KR0150358B1 publication Critical patent/KR0150358B1/en

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B29/00—Generation of noise currents and voltages
    • 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

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

본 발명은 확산부호 대역 다중통신(Code Division Multiple Access; 이하 CDMA라 칭함)에서의 노이즈 시뮬레이션을 위한 잡음발생기에 있어서, 특히 하나의 테스트 장비로 단순히 국부 발생기의 주파수를 변환시키고 원하는 대역에 맞는 여파기와 증폭기 만으로 원하는 주파수 대역의 시뮬레이션을 할 수 있도록 함을 특징으로 하는 가변 주파수 잡음 발생기에 관한 것으로, 종래의 방식으로 제작된 CDMA 노이즈 시뮬레이션은 한 주파수 대역에서만 시뮬레이션이 가능하다는 단점이 있다. 즉, 노이즈 제너레이터의 출력이 70Mhz로 되어 있으면 직접적으로는 70MHz 대역의 시뮬레이션만이 가능하다는 문제점이 있어, 본 발명은 주파수를 상향 또는 하향으로 조정가능 하도록, 고정된 출력주파수 밴드를 가변시키기 위해 국부 발진기와 혼합기를 이용해 재구성한 것이다.The present invention relates to a noise generator for noise simulation in code division multiple access (CDMA), in particular to a single test equipment that simply converts the frequency of the local generator and The present invention relates to a variable frequency noise generator characterized in that a simulation of a desired frequency band can be performed using only an amplifier, and a conventional CDMA noise simulation can be simulated only in one frequency band. In other words, if the output of the noise generator is 70Mhz, only the 70MHz band can be directly simulated, and the present invention provides a local oscillator for varying the fixed output frequency band so that the frequency can be adjusted upward or downward. Reconstructed using and mixer.

Description

가변주파수 잡음 발생기Variable frequency noise generator

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제도는 본 발명 가변주파수 잡음 발생기 블록 다이어그램이다.The scheme is a variable frequency noise generator block diagram of the present invention.

Claims (2)

노이즈 시뮬레이션을 위한 잡음발생기에 있어서, 일정주파수의 노이즈를 출력하는 제너레이터 카드(10)의 노이즈 신호를 증폭기(11) 및 여파기(12)로 통과시켜 증폭 및 이미지 신호가 제거된 노이즈 신호와, 국부발진기(14)로부터 여파기(15)를 거쳐 나온 신호와 상기 노이즈 신호를 혼합하여, 상기 발생된 여러가지 합차 노이즈 신호중 원하는 주파수 대역의 노이즈 신호를 여파기(16)를 통해 걸러낸 후 증폭기(17)와 감쇄기(18)를 통해 파워를 원하는 레벨로 조정하여 내보내도록 하는 혼합기(13)를 포함하여 구성함을 특징으로 하는 가변주파수 잡음 발생기.In the noise generator for the noise simulation, the noise signal of the generator card 10 which outputs the noise of a constant frequency to the amplifier 11 and the filter 12 to remove the amplification and image signal, and the local oscillator The signal passed through the filter 15 from the filter 14 and the noise signal are mixed and the noise signal of the desired frequency band is filtered out through the filter 16 among the various sum noise signals generated, and then the amplifier 17 and the attenuator ( 18) variable frequency noise generator, characterized in that it comprises a mixer (13) to adjust the power to the desired level through the. 제1항에 있어서, 출력주파수를 원하는 대역으로 곧바로 변환하기 힘들 경우 중간주파수 대역 단계를 여러번 거쳐 주파수를 변환토록함을 특징으로 하는 가변주파수 잡음 발생기.The variable frequency noise generator as set forth in claim 1, wherein when the output frequency cannot be directly converted into a desired band, the frequency is converted through the intermediate frequency band several times. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950008572A 1995-04-12 1995-04-12 Variable frequency noise generator KR0150358B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950008572A KR0150358B1 (en) 1995-04-12 1995-04-12 Variable frequency noise generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950008572A KR0150358B1 (en) 1995-04-12 1995-04-12 Variable frequency noise generator

Publications (2)

Publication Number Publication Date
KR960039731A true KR960039731A (en) 1996-11-25
KR0150358B1 KR0150358B1 (en) 1998-11-02

Family

ID=19412041

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950008572A KR0150358B1 (en) 1995-04-12 1995-04-12 Variable frequency noise generator

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KR (1) KR0150358B1 (en)

Also Published As

Publication number Publication date
KR0150358B1 (en) 1998-11-02

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