GB613854A - Improvements in and relating to repeater systems for high frequency electric waves - Google Patents

Improvements in and relating to repeater systems for high frequency electric waves

Info

Publication number
GB613854A
GB613854A GB197246A GB197246A GB613854A GB 613854 A GB613854 A GB 613854A GB 197246 A GB197246 A GB 197246A GB 197246 A GB197246 A GB 197246A GB 613854 A GB613854 A GB 613854A
Authority
GB
United Kingdom
Prior art keywords
frequency
mixed
circuits
received signals
oscillator
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.)
Expired
Application number
GB197246A
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB197246A priority Critical patent/GB613854A/en
Priority to GB1758147A priority patent/GB613902A/en
Publication of GB613854A publication Critical patent/GB613854A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • 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
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels

Abstract

613,854. Two-way transmission. GENERAL ELECTRIC CO., Ltd., and GLADWIN, A. S. Jan. 21, 1946, No. 1972. [Class 40 (iv)] [Also in Group XL (c)] The invention relates to radio-repeater stations which handle in separate circuits two signals travelling in the same or in opposite directions, in which each of the received signals is converted to an intermediate frequency for amplification and is then reconverted to a new frequency for retransmission, the transmit and receive frequencies differing by a relatively small amount f1. According to the invention one or more of the beat oscillators associated with the frequency conversion is made common to both circuits. The Figure shows an arrangement in which one of the received signals fc is mixed with a frequency fo from oscillator 2 to produce an intermediate frequency of fo-fc which after passing through amplifier 5 is mixed with a frequency f1 from oscillator 5. The resultant product f1 -fo+fc is mixed with fo to produce the transmit frequency fc+f1. The other signal fc+f2 received at E is converted to a frequency fc+f1+f2 in the second circuit in a similar manner. Oscillators 2 and 5 are common to both circuits. In systems where the two received signals are of the same frequency (i.e. f2=0) a further simplification results from making amplifiers 3 and 6<SP>1</SP> and 31 and 6 identical. The invention may also be applied when the arrangement referred to in Specification 613,902, [Group XL (c)] is used.
GB197246A 1946-01-21 1946-01-21 Improvements in and relating to repeater systems for high frequency electric waves Expired GB613854A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB197246A GB613854A (en) 1946-01-21 1946-01-21 Improvements in and relating to repeater systems for high frequency electric waves
GB1758147A GB613902A (en) 1946-01-21 1946-01-21 Improvements in and relating to repeater systems for high frequency electric waves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB197246A GB613854A (en) 1946-01-21 1946-01-21 Improvements in and relating to repeater systems for high frequency electric waves

Publications (1)

Publication Number Publication Date
GB613854A true GB613854A (en) 1948-12-03

Family

ID=9731289

Family Applications (2)

Application Number Title Priority Date Filing Date
GB197246A Expired GB613854A (en) 1946-01-21 1946-01-21 Improvements in and relating to repeater systems for high frequency electric waves
GB1758147A Expired GB613902A (en) 1946-01-21 1946-01-21 Improvements in and relating to repeater systems for high frequency electric waves

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB1758147A Expired GB613902A (en) 1946-01-21 1946-01-21 Improvements in and relating to repeater systems for high frequency electric waves

Country Status (1)

Country Link
GB (2) GB613854A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5625623A (en) * 1994-10-14 1997-04-29 Erilsson Ge Mobile Communications Inc. RF site communication link

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4776032A (en) * 1985-05-15 1988-10-04 Nippon Telegraph And Telephone Corporation Repeater for a same frequency with spillover measurement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5625623A (en) * 1994-10-14 1997-04-29 Erilsson Ge Mobile Communications Inc. RF site communication link

Also Published As

Publication number Publication date
GB613902A (en) 1948-12-03

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