JPS6460135A - Radiocommunication system - Google Patents

Radiocommunication system

Info

Publication number
JPS6460135A
JPS6460135A JP21739487A JP21739487A JPS6460135A JP S6460135 A JPS6460135 A JP S6460135A JP 21739487 A JP21739487 A JP 21739487A JP 21739487 A JP21739487 A JP 21739487A JP S6460135 A JPS6460135 A JP S6460135A
Authority
JP
Japan
Prior art keywords
receiving
fsk
transmitting
burst
direct modulation
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
JP21739487A
Other languages
Japanese (ja)
Inventor
Yukio Takeda
Takeshi Takano
Takaharu Nakamura
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP21739487A priority Critical patent/JPS6460135A/en
Priority to DE3887204T priority patent/DE3887204T2/en
Priority to EP88108517A priority patent/EP0292996B1/en
Priority to US07/199,703 priority patent/US4903257A/en
Publication of JPS6460135A publication Critical patent/JPS6460135A/en
Pending legal-status Critical Current

Links

Landscapes

  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To commonly use an oscillator by a transmitting part and a receiving part and to simplify a circuit constitution by executing an FSK direct modulation at a transmitting side, simultaneously, executing an FSK direct conversion receiving at the receiving part, at the time of receiving a burst, using the carrier output of an FSK direct modulation oscillator and executing the FSK direct conversion receiving at the receiving part. CONSTITUTION:An FSK direct modulation oscillator 1 generates an output to FSK-modulate the carrier of a transmitting frequency f1 by transmitting data at the time of transmitting the burst, and the signal is sent to an opponent station side. At the time of receiving the burst at the opponent station side, the FSK direct modulation oscillator 1 is non-modulating and outputs the carrier of the frequency f1. An FSK direct conversion receiver 2 demodulates a receiving burst by the carrier of the FSK direct modulation oscillator 1 and generates regenerating data. The output signal of the FSK direct modulation oscillator 1 is switched by a switch and commonly used both for generating a transmitting burst signal and for demodulating a receiving burst signal. Thus, the interference between the transmitting part and the receiving part can be eliminated, and simultaneously, the circuit constitution can be simplified.
JP21739487A 1987-05-27 1987-08-31 Radiocommunication system Pending JPS6460135A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP21739487A JPS6460135A (en) 1987-08-31 1987-08-31 Radiocommunication system
DE3887204T DE3887204T2 (en) 1987-05-27 1988-05-27 Digital bi-directional radio transmission system using a single frequency.
EP88108517A EP0292996B1 (en) 1987-05-27 1988-05-27 Digital two-way radiocommunication system using single frequency
US07/199,703 US4903257A (en) 1987-05-27 1988-05-27 Digital two-way radio-communication system using single frequency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21739487A JPS6460135A (en) 1987-08-31 1987-08-31 Radiocommunication system

Publications (1)

Publication Number Publication Date
JPS6460135A true JPS6460135A (en) 1989-03-07

Family

ID=16703498

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21739487A Pending JPS6460135A (en) 1987-05-27 1987-08-31 Radiocommunication system

Country Status (1)

Country Link
JP (1) JPS6460135A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2712756A1 (en) * 1993-11-19 1995-05-24 C2Es Bidirectional high frequency modem for radio transmissions
EP0714177A2 (en) 1994-11-22 1996-05-29 Nec Corporation Radiocommunication system operating in a time shared control
US11608422B2 (en) 2020-04-28 2023-03-21 Nan Ya Plastics Corporation White polyester film and method for manufacturing the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5773544A (en) * 1980-08-26 1982-05-08 Int Standard Electric Corp Digital single channel double transmission system transceiver
JPS6190544A (en) * 1984-10-04 1986-05-08 アメリカン　テレフオン　アンド　テレグラフ　カムパニー Duplex transmission method and device by simplex radio channel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5773544A (en) * 1980-08-26 1982-05-08 Int Standard Electric Corp Digital single channel double transmission system transceiver
JPS6190544A (en) * 1984-10-04 1986-05-08 アメリカン　テレフオン　アンド　テレグラフ　カムパニー Duplex transmission method and device by simplex radio channel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2712756A1 (en) * 1993-11-19 1995-05-24 C2Es Bidirectional high frequency modem for radio transmissions
EP0714177A2 (en) 1994-11-22 1996-05-29 Nec Corporation Radiocommunication system operating in a time shared control
US11608422B2 (en) 2020-04-28 2023-03-21 Nan Ya Plastics Corporation White polyester film and method for manufacturing the same

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