KR970055325A - 1: N interpolation FIR filter - Google Patents

1: N interpolation FIR filter Download PDF

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Publication number
KR970055325A
KR970055325A KR1019950053626A KR19950053626A KR970055325A KR 970055325 A KR970055325 A KR 970055325A KR 1019950053626 A KR1019950053626 A KR 1019950053626A KR 19950053626 A KR19950053626 A KR 19950053626A KR 970055325 A KR970055325 A KR 970055325A
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KR
South Korea
Prior art keywords
impulse response
rom
channel
finite impulse
input terminal
Prior art date
Application number
KR1019950053626A
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Korean (ko)
Other versions
KR100199006B1 (en
Inventor
김영균
정용주
방승찬
김민택
Original Assignee
양승택
한국전자통신연구원
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Priority to KR1019950053626A priority Critical patent/KR100199006B1/en
Publication of KR970055325A publication Critical patent/KR970055325A/en
Application granted granted Critical
Publication of KR100199006B1 publication Critical patent/KR100199006B1/en

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/06—Non-recursive filters
    • H03H17/0621—Non-recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing
    • H03H17/0635—Non-recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing characterized by the ratio between the input-sampling and output-delivery frequencies
    • H03H17/065—Non-recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing characterized by the ratio between the input-sampling and output-delivery frequencies the ratio being integer
    • H03H17/0657—Non-recursive filters with input-sampling frequency and output-delivery frequency which differ, e.g. extrapolation; Anti-aliasing characterized by the ratio between the input-sampling and output-delivery frequencies the ratio being integer where the output-delivery frequency is higher than the input sampling frequency, i.e. interpolation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0223—Computation saving measures; Accelerating measures
    • H03H17/0227—Measures concerning the coefficients
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H2017/0072—Theoretical filter design
    • H03H2017/0081—Theoretical filter design of FIR filters

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Computing Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Filters That Use Time-Delay Elements (AREA)

Abstract

본 발명은 1 : N 인터폴레이션 유한임펄스응답(Finite Impulse Response : 이하, FIR) 필터에 관한 것으로 특히, 코드분할 다중접속(Code Division Multiple Access : 이하, CDMA) 디지틀 이동통신에서 채택한 QPSK 변조방식에서 사용하는 1 : N 인터폴레이션 FIR 필터에 관한 것으로, 유한임펄스응답 필터의 적산계수를 저장하고 있는 롬(ROM)이 상기 적산계수 중에서 일부만을 저장하고 있고, 다른 적산계수는 어드레스 조작을 통하여 상기 롬에 저장되어 있는 적산계수에서 얻는 것을 특징으로 하여, 회로의 구성이 간단하고 칩의 크기를 최소화할수 있으며 전력소모를 최소화할수 있는 효과가 있다.The present invention relates to a 1: N interpolation finite impulse response (FIR) filter, and in particular, used in a QPSK modulation scheme adopted in code division multiple access (CDMA) digital mobile communication. 1: an N interpolation FIR filter, wherein a ROM storing an integration coefficient of a finite impulse response filter stores only a part of the integration coefficient, and another integration coefficient is stored in the ROM through an address operation. Characterized by the integration factor, the circuit configuration is simple, the size of the chip can be minimized, and the power consumption can be minimized.

Description

1 : N 인터폴레이션 FIR 필터1: N interpolation FIR filter

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 따른 QPSK 변조기용 1 : 4 인터폴레이션 FIR 필터의 회로도이다.1 is a circuit diagram of a 1: 4 interpolation FIR filter for a QPSK modulator according to the present invention.

제2도는 본 발명에 따른 QPSK 변조기용 1 : 4 인터폴레이션 FIR 필터의 타이밍도이다.2 is a timing diagram of a 1: 4 interpolation FIR filter for a QPSK modulator according to the present invention.

Claims (2)

I채널 입력단과 Q채널 입력단; 클락신호 발생수단; 상기 I채널 입력단과 연결되어, 상기 I채널을 통해 들어오는 입력데이타를 순차적으로 저장하는 제1저장수단; 상기 Q채널 입력단과 연결되어, 상기 Q채널을 통해 들어오는 입력데이타를 순차적으로 저장하는 제2저장수단; 상기 제1 내지 제2저장수단과 입력단이 연결되고, 상기 클락신호 발생수단으로부터의 클락신호에 따라서 상기 제1 내지 제2저장수단에 저장되어 있는 입력데이타를 출력하는 먹스(MUX); 상기 먹스의 출력단에 연결되며, 유한임펄스응답 필터의 적산계수 중에서 일부를 저장하고 있는 롬(ROM); 및 가산기로 구성된 것을 특징으로 한 1 : N 인터폴레이션 유한임펄스응답 필터.I channel input terminal and Q channel input terminal; Clock signal generating means; First storage means connected to the I channel input terminal and sequentially storing the input data received through the I channel; Second storage means connected to the Q channel input terminal and sequentially storing input data input through the Q channel; A mux connected to the first to second storage means and an input terminal and outputting input data stored in the first to second storage means according to a clock signal from the clock signal generating means; A ROM connected to the output terminal of the mux and storing a part of integration coefficients of a finite impulse response filter; And an adder. 1: N interpolation finite impulse response filter. 제1항에 있어서, 상기 롬은 유한임펄스응답 필터의 적산계수 중에서 일부만을 저장하고 있고, 다른 적산계수는 어드레스 조작을 통하여 상기 롬에 저장되어 있는 적산계수에서 얻는 것을 특징으로 하는 1 : N 인터폴레이션 유한임펄스응답 필터.The ROM of claim 1, wherein the ROM stores only a part of the integration coefficients of the finite impulse response filter, and the other integration coefficients are obtained from the integration coefficients stored in the ROM through an address operation. Impulse response filter. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950053626A 1995-12-21 1995-12-21 1:n interpolation fir filter KR100199006B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950053626A KR100199006B1 (en) 1995-12-21 1995-12-21 1:n interpolation fir filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950053626A KR100199006B1 (en) 1995-12-21 1995-12-21 1:n interpolation fir filter

Publications (2)

Publication Number Publication Date
KR970055325A true KR970055325A (en) 1997-07-31
KR100199006B1 KR100199006B1 (en) 1999-06-15

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Application Number Title Priority Date Filing Date
KR1019950053626A KR100199006B1 (en) 1995-12-21 1995-12-21 1:n interpolation fir filter

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100425418B1 (en) * 2001-09-07 2004-03-30 삼성탈레스 주식회사 Block interpolation filter structure using loop up table

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100425418B1 (en) * 2001-09-07 2004-03-30 삼성탈레스 주식회사 Block interpolation filter structure using loop up table

Also Published As

Publication number Publication date
KR100199006B1 (en) 1999-06-15

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