KR940017253A - MSK (minimum shift kdeying) demodulation device using BFSK demodulation method - Google Patents

MSK (minimum shift kdeying) demodulation device using BFSK demodulation method Download PDF

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KR940017253A
KR940017253A KR1019920026087A KR920026087A KR940017253A KR 940017253 A KR940017253 A KR 940017253A KR 1019920026087 A KR1019920026087 A KR 1019920026087A KR 920026087 A KR920026087 A KR 920026087A KR 940017253 A KR940017253 A KR 940017253A
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South Korea
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output
signal
msk
intermediate frequency
data
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KR1019920026087A
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KR950003667B1 (en
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김도욱
김호영
김기홍
정용주
김대호
박영옥
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양승택
재단법인 한국전자통신연구소
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/18Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22Demodulator circuits; Receiver circuits

Abstract

본 발명은 디지틀 변복조방식중 MSK의 변조파형의 특성을 이용하여 BFSK방식으로 MSK변조 신호를 복원해낼 수 있는 MSK의 수신 및 데이터의 차분 부호화(differential encoding)를 수행하는 MSK의 변복조 장치에 관한 것이다.The present invention relates to an MSK demodulation device for performing MSK reception and differential encoding of data capable of recovering an MSK modulated signal in a BFSK method by using characteristics of an MSK modulation waveform among digital modulation and demodulation methods.

본 발명은, 차분 부호화시에 발생하는 성능 저하를 방지하기 위해 송신단에서 전송하고자 하는 데이터를 MSK 변조하기 전에 역방향 차분 부호화하고난 후에 MSK변조함으로서 이 신호를 BFSK 복조 방식으로 복조하여 원래 전송하고자 하는 데이터를 얻게한 변복조 장치를 제공한다.In order to prevent the performance degradation occurring in differential encoding, the present invention demodulates this signal by BFSK demodulation method by performing MSK modulation after backward differential coding before MSK modulation of data to be transmitted at the transmitting end. Provides a modulation and demodulation device.

Description

비.에프.에스.케이(BFSK) 복조방식을 이용한 엠.에스.케이(MSK : minimum shift keying)의 변복조 장치Modulation and Demodulation Device for MSK (Minimum Shift Keying) using BFSK Demodulation

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

제2도는 본 발명의 BFSK 복조방식을 이용한 MSK 복조기의 구성예시도, 제3도는 본 발명의 역방향 차분 부호화를 한 MSK 변조기의 구성예시도, 제4도는 본 발명의 역방향 차분 복호화를 한 MSK 복조기의 구성예시도.2 is a configuration example of an MSK demodulator using the BFSK demodulation method of the present invention, and FIG. 3 is a configuration example of an MSK modulator with backward differential coding according to the present invention, and FIG. 4 is a configuration example of an MSK demodulator with reverse differential decoding according to the present invention. Configuration example.

Claims (4)

BFSK 복조방식을 이용한 MSK의 변복조 장치에 있어서, 전송하고자 하는 데이터를 역방향 차동 부호화시키는 역방향 차동부호화 수단(41)과, 상기 역방향 차동부호화 수단(41)의 출력을 직병렬 변환기(1)를 통해 통상과 직교채널로 분리하고,직교채널에서는 지연소자(2)를 통해 동싱데이터에 대해 직교데이터를 지연시키고, 동상데이터와 직교데이터는 신호를 쉐이핑(shapin)하기 위해 각각에 대해 정현파 발생기(5)의 출력과, 상기 정현파를 위상천이시킨 신호를 혼합기(3,9)를 통해각각 변조시키고, 혼합기(3,9)의 출력을 반송파주파수의 정현파 발생기(6)의 출력과 이를 위상 천이시킨 신호로 변조시켜결합기(11)로 결합하여 MSK 변조신호를 생성하는 송신 수단을 구비하는 변조수단과; 입력되어 처리된 중간 주파수대의MSK 변조신호에서 중간주파수에 동기화된 cos(wift)와 sin(wift)신호를 생성하는 중간주파수재생수단(29)과, 상기 중간주파수 재생수단(29)의 출력신호를 각각 국부적으로 입력하는 혼합수단(26,27)와, 상기 혼합수단(26,27)의 출력신호를 필터링하는 저역여파수단(24,25)와 적분수단(22,23)으로 구성딘 매치드(matched) 필터와, 상기 매치드 필터의 신호를 입력받아 신호레벨을 비교하여 1 또는 -1로 판별하여 데이터를 출력하는 판별수단(21)과 중간주파 재생수단(ICRC; 29)의 출력을입력으로 받아 클럭을 추출하여 상기 적분수단(22,23)과 판별수단(21)으로 제공하는 클럭 재생수단(DRC; 28)을 구비하는변조 수신수단을 포함하는 것을 특징으로 하는 BFSK 복조방식을 이용한 MSK의 변복조 장치.In the MSK demodulation device using the BFSK demodulation method, a reverse differential encoding means (41) for performing reverse differential encoding of data to be transmitted, and an output of the reverse differential encoding means (41) through a serial-to-parallel converter (1), And orthogonal channels, and in orthogonal channels, delay orthogonal data with respect to synchronizing data through delay element 2, and in-phase data and orthogonal data are respectively divided into sinusoidal wave generators 5 for shaping the signal. The output and the phase shifted signal of the sine wave are modulated by the mixers 3 and 9, respectively, and the output of the mixers 3 and 9 is modulated by the output of the sinusoidal wave generator 6 of the carrier frequency and the phase shifted signal. Modulating means for transmitting to combiner 11 to produce an MSK modulated signal; An intermediate frequency reproducing means 29 for generating a cos (wift) and sin (wift) signal synchronized with the intermediate frequency from the MSK modulation signal of the intermediate frequency band inputted and processed, and an output signal of the intermediate frequency reproducing means 29 Matching means composed of mixing means 26 and 27 input locally, low filtering means 24 and 25 and integral means 22 and 23 filtering the output signal of the mixing means 26 and 27, respectively. matched) filter and the output of the discriminating means 21 and the intermediate frequency reproducing means (ICRC) 29 for inputting the signal of the matched filter and comparing the signal level and discriminating 1 or -1 to output data. Receiving and extracting a clock and including a modulating receiving means having a clock reproducing means (DRC) 28 which is provided to the integrating means 22 and 23 and the discriminating means 21. Modulation demodulation device. 제1항에 있어서, 상기 변조수단의 역방향 차동부호화 수단(41)은, 입력데이터를 한쪽 입력단으로 입력받는 배타적 논리합처리수단(61)과, 상기 배타적 논리합 처리수단(61)의 출력을 지연시켜 궤환시켜 상기 배타적 논리합 처리 수단(61)의 다른 입력으로 제공하는 지연수단(62)을 구비하는 것을 특징으로 하는 BFSK 복조방식을 이용한 MSK의 변복조 장치.2. The reverse differential encoding means (41) of claim 1, wherein the reverse differential encoding means (41) of the modulation means delays the output of the exclusive OR processing means (61) for receiving input data into one input terminal and feeds back the delayed output of the exclusive OR processing means (61). And a delay means (62) for providing it as another input of said exclusive-OR processing means (61). BFSK 복조방식을 이용한 MSK의 복조장치에 있어서, 입력되어 처리된 중간 주파수대의 MSK 변조신호에서 중간주파수에 동기화된 cos(wift)와 sin(wift)신호를 생성하는중간주파재생수단(29)과, 상기 중간주파 재생수단(29)의 출력신호를 각각국부적으로 입력하는 혼합수단(26,27)와, 상기 혼합수단(26,27)의 출력신호를 필터링하는 저역여파수단(24,25)와 적분수단(22,23)으로 구성된 매치드(matched)필터와, 상기 매치드 필터의 신호를 입력받아 신호레벨을 비교하여 1 또는 -1로 판별하여 데이터를 출력하는 판별수단(21)과, 상기 판별수단(21)의 출력을 역방향 차동 복호화시키는 역방향 차동복호화 수단(51)과, 중간주파 재생수단(ICRC; 29)의 출력을 입력으로 받아 클럭을 추출하여 상기 적분수단(22,23)과 판별수단(21)으로 제공하는 클럭 재생수단(DRC; 28)을 구비한 것을 특징으로 하는 BFSK 복조방식을 이용한 MSK의 복조 장치.An MSK demodulation device using the BFSK demodulation method, comprising: an intermediate frequency reproducing means 29 for generating a cos (wift) and sin (wift) signal synchronized to an intermediate frequency from an MSK modulated signal input and processed in an intermediate frequency band, Mixing means (26, 27) for locally inputting the output signal of the intermediate frequency regenerating means (29), low-pass filter means (24, 25) for integrating the output signals of the mixing means (26, 27) and integral A matched filter composed of means 22 and 23, a discrimination means 21 for receiving the signal of the matched filter and comparing the signal level and discriminating 1 or -1 to output data; A reverse differential decoding means 51 for reverse differential decoding of the output of the means 21 and an output of an intermediate frequency reproducing means (ICRC) 29 as an input to extract a clock, thereby integrating the integration means 22 and 23 and the discriminating means. And clock reproducing means (DRC) 28 provided to 21. Demodulator of the MSK using BFSK demodulation method. 제3항에 있어서, 상기 역방향 차동복호화 수단(51)은, 입력데이터를 한쪽 입력단으로 입력받는 배타적 논리합 처리 수단(61)과, 상기 배타적 논리합 처리 수단(61)의 출력을 지연시켜 궤환시켜 상기 배타적 논리합 처리 수단(61)의 다른 입력으로 제공하는 지연수단(62)을 구비하는 것을 특징으로 하는 BFSK 복조방식을 이용한 MSK의 복조 장치.The reverse differential decoding means (51) according to claim 3, wherein the reverse differential decoding means (51) delays the output of the exclusive-OR processing means (61), which receives input data from one input terminal, and the output of the exclusive-OR processing means (61). And a delay means (62) provided to another input of the logical sum processing means (61). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920026087A 1992-12-29 1992-12-29 Minimum shift keying modulator and demodulator using bfsk demodulating method KR950003667B1 (en)

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