JPS5491120A - Psk demodulation system for diversity receiving - Google Patents

Psk demodulation system for diversity receiving

Info

Publication number
JPS5491120A
JPS5491120A JP15938377A JP15938377A JPS5491120A JP S5491120 A JPS5491120 A JP S5491120A JP 15938377 A JP15938377 A JP 15938377A JP 15938377 A JP15938377 A JP 15938377A JP S5491120 A JPS5491120 A JP S5491120A
Authority
JP
Japan
Prior art keywords
signals
phase
signal
intermediate frequency
psk
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP15938377A
Other languages
Japanese (ja)
Inventor
Masao Takagi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP15938377A priority Critical patent/JPS5491120A/en
Publication of JPS5491120A publication Critical patent/JPS5491120A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/04—Arrangements for detecting or preventing errors in the information received by diversity reception using frequency diversity

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Radio Transmission System (AREA)

Abstract

PURPOSE:To improve C/N (the ratio of signals to noise) by making phases of two PSK demodulating carriers in-phase in a PSK demodulator for quadruple diversity receiving. CONSTITUTION:Two signals which were subjected to frequency diversity are converted to the first intermediate frequency of the same frequency and are synthesized in the same phase to become signals fic and f'ic. Synthesized signal fic becomes the second intermediate frequency signal fica in mixer 10 by oscillated signals of VCO 19, and meanwhile, synthesized signal f'ic is mixed with the signal of local oscillator 16 in mixer 10' and becomes the second intermediate frequency signal. Two second intermediate frequency signals are applied to phase detector 17, and the difference between two signals is detected to feed back the detection signal to VCO 19, and both signals are made in-phase. Both in-phase signals are applied to carrier synthesizer 18 and become carriers applied to PSK demodulators 14 and 14'. Output data signals of demodulators 14 and 14' are sunthesized in combiner 15, thereby constituting a quadruple diversity system.
JP15938377A 1977-12-28 1977-12-28 Psk demodulation system for diversity receiving Pending JPS5491120A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15938377A JPS5491120A (en) 1977-12-28 1977-12-28 Psk demodulation system for diversity receiving

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15938377A JPS5491120A (en) 1977-12-28 1977-12-28 Psk demodulation system for diversity receiving

Publications (1)

Publication Number Publication Date
JPS5491120A true JPS5491120A (en) 1979-07-19

Family

ID=15692594

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15938377A Pending JPS5491120A (en) 1977-12-28 1977-12-28 Psk demodulation system for diversity receiving

Country Status (1)

Country Link
JP (1) JPS5491120A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61198825A (en) * 1985-02-20 1986-09-03 Kokusai Electric Co Ltd Diversity reception method by s/n selection of broadcast data signal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61198825A (en) * 1985-02-20 1986-09-03 Kokusai Electric Co Ltd Diversity reception method by s/n selection of broadcast data signal

Similar Documents

Publication Publication Date Title
EP0528118B1 (en) Multi-frequency communication system with an improved diversity scheme
HK1004359A1 (en) Reception of orthogonal frequency division multiplexed signals
KR890702344A (en) Receiver and method for recovering frequency modulated signal
AU587123B2 (en) An adaptive depolarisation-interference compensator
GB1534380A (en) Communications system
JPS54117671A (en) Carrier wave reproducing circuit
GB1511041A (en) Fm-detector
US4042884A (en) Phase demodulator with offset frequency reference oscillator
JPH025275B2 (en)
WO1999027689A3 (en) Demodulation unit and method of demodulating a quadrature signal
US3873931A (en) FM demodulator circuits
CA1067161A (en) Quadrature multiplying four-channel demodulator
GB2130826A (en) Directly mixing synchronous receiver
JPS60142604A (en) Frequency modulation detector
JPS5491120A (en) Psk demodulation system for diversity receiving
US4435618A (en) Adjacent station interference rejecting circuit
KR880000869B1 (en) Synchronoru evelope detector
JPS6444153A (en) Demodulator
US4216428A (en) Pulse signal receiving system employing space diversity
US4603302A (en) Frequency modulation detectors
JP2001156594A (en) Frequency modulated receiver used especially in rds
JPS6089155A (en) Phase locked loop system
JPS55136755A (en) Carrier synchronizing system for psk signal
JPS5846883B2 (en) AM receiver
JPS55137753A (en) Synchronizing decision signal forming circuit of pll circuit