JPS56152342A - Radio communication system - Google Patents

Radio communication system

Info

Publication number
JPS56152342A
JPS56152342A JP5494480A JP5494480A JPS56152342A JP S56152342 A JPS56152342 A JP S56152342A JP 5494480 A JP5494480 A JP 5494480A JP 5494480 A JP5494480 A JP 5494480A JP S56152342 A JPS56152342 A JP S56152342A
Authority
JP
Japan
Prior art keywords
sound
transmission
digital signal
frequency
base stations
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
JP5494480A
Other languages
Japanese (ja)
Inventor
Yasunori Yokoyama
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP5494480A priority Critical patent/JPS56152342A/en
Publication of JPS56152342A publication Critical patent/JPS56152342A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile

Abstract

PURPOSE:To improve the bit error rate without beat tone and sound distortion, by giving the offset to the transmission frequency between adjacent base stations only for digital signal transmission. CONSTITUTION:At the sound transmission time, select switch 4 is set to the side of sound signal input terminal 5, and transmitters 1C, 2C, and 3C are operated with the same transmission frequency F in respective base stations Z1, Z2 and Z3. At the digital signal transmission time, select switch 4 is set to the side of digital signal input terminal 6, and transmission frequency switches 1e and 3e of base stations Z1 and Z3 are operated by remote switching part 8 to shift transmission frequencies of base stations Z1 and Z3 from the transmission frequency of adjacent base station Z2 by offset frequency DELTAF. As a result, beat tone and sound distortion are not generated at the sound transmission time becuase the influence of the offset frequency does not appear at all, and the bit error rate is improved at the digital signal transmission time by giving the offset.
JP5494480A 1980-04-24 1980-04-24 Radio communication system Pending JPS56152342A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5494480A JPS56152342A (en) 1980-04-24 1980-04-24 Radio communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5494480A JPS56152342A (en) 1980-04-24 1980-04-24 Radio communication system

Publications (1)

Publication Number Publication Date
JPS56152342A true JPS56152342A (en) 1981-11-25

Family

ID=12984752

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5494480A Pending JPS56152342A (en) 1980-04-24 1980-04-24 Radio communication system

Country Status (1)

Country Link
JP (1) JPS56152342A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6023459A (en) * 1996-12-04 2000-02-08 Northern Telecom Limited Frequency assignment in wireless networks

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6023459A (en) * 1996-12-04 2000-02-08 Northern Telecom Limited Frequency assignment in wireless networks

Similar Documents

Publication Publication Date Title
JPS56152342A (en) Radio communication system
JPS5245813A (en) Wireless telephone system
ES8200802A1 (en) Lay-out for transmitting control signals via a speech channel.
JPS5531311A (en) Direct trunk setting system for multi-channel radio communication system
JPS55147044A (en) Radio call system
FR2390859A1 (en) Transceiver arrangement for telecommunications connections - enables dual frequency, speech connection to be made with selected other send-receive arrangement via tuned relay amplifiers (NL 15.11.78)
JPS5773539A (en) Mobile radio communication system
JPS5679540A (en) Switching system of transmission and reception
JPS5772462A (en) Transmission device
JPS6471222A (en) Transmission/reception filter band split system for antenna multicoupler
JPH05252074A (en) Transmitter-receiver
JPS572145A (en) Radio transmission system
JPS5791067A (en) Data transmission and reception device
JPS55114063A (en) Telephone set system
JPS5430707A (en) Six-wire switching system
JPS5634269A (en) Push-button dial telephone set
JPS57188147A (en) Radio transmitter and receiver
JPS57186853A (en) Radio circuit setting system
JPS6461137A (en) Microwave band communication system
JPS5547741A (en) Fm receiver
JPS57206141A (en) Switching system of channel in busy
GB1178693A (en) Improvements in or relating to Carrier Telephony Equipment
JPS57170637A (en) Simple on-line communication system
JPS5531365A (en) Roundabout check circuit
JPS5612138A (en) Press-to-talk calling system of radio telephone