EP0468688A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method and apparatus for providing wireless communications between remote locations
Assignee: AT&T Inc
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Filing: 1991-07-17
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Granted: —
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Expires: 2011-07-17
Abstract
Abstract A wireless telecommunication system includes a microwave link between a main base station (100) and a remote reception and radiation site (106) capable of communicating with a plurality of telephone subscriber stations (107, 108). At the main base station (100), radio frequency signals intended for the telephone subscriber stations are modulated on a microwave frequency carrier signal prior their transmission, via a microwave antenna (112), to the remote site. At the remote site (106), the frequencies of the microwave signals, received at a microwave antenna (114), are reduced prior to modulating such frequency-reduced signals on a radio frequency carrier signal and radiating, via a radio frequency antenna (115), the modulated radio signals out of the site. All radio signals received at the remote site from telephone subscriber stations are modulated on a microwave carrier signal prior to their transmission, via a microwave antenna (114), to the main base station (100). At the main base station (100), the frequencies of the incoming microwave signals are reduced prior to modulating such frequency-reduced signals on a radio frequency carrier signal and coupling the modulated radio signals to a receiver.
Inventors
- 👤 Jesse Eugene Russell
- 👤 George Isaac Zysman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 17:52
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/24; H04B7/26
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
113 words
A method for providing wireless communications between a main base station (100) of a type capable of being connected to a telephone network (104) and at least one remote reception and radiation site (106) of a type capable of communicating with a plurality of telephone subscriber stations (107,108) over predetermined radio frequencies, CHARACTERISED BY reducing the frequency of radio signals which are intended for the telephone subscriber stations to a lower frequency range, amplifying the frequency-reduced signals, modulating the amplified signals on a microwave frequency carrier signal, amplifying the microwave frequency modulated signals, and coupling the amplified microwave signals to a microwave antenna (112) for transmission to the remote reception and radiation site.
Claim 2
Dependent Claim
41 words
A method as claimed in claim 1 wherein the frequency reducing step comprises the step of reducing the frequency of the radio signals to a frequency range of the order of the frequency band of the remote reception and radiation site.
Claim 3
Independent Claim
131 words
A method for receiving wireless communications signals at a main base station (100) of a type capable of being connected to a telephone network (104) from at least one remote reception and radiation site (106) of a type capable of communicating with a plurality of telephone subscriber stations (107,108) over predetermined radio frequencies, CHARACTERISED BY receiving at a microwave antenna (112) of the main base station incoming microwave signals, amplifying the received microwave signals, reducing the frequency of the amplified signals to a substantially lower frequency range which comprises the subscriber stations predetermined radio frequencies, amplifying the frequency-reduced signals, modulating the amplified frequency-reduced signals on a radio frequency carrier signal to generate radio frequency signals, and coupling the generated radio frequency signals to receiving means (200) within the main base station.
Claim 4
Independent Claim
85 words
A method for transmitting from a reception and radiation site (106) a plurality of radio telecommunications signals having predetermined radio frequencies and intended for a plurality of telephone subscriber stations (107,108), CHARACTERISED BY receiving at the site incoming microwave signals, reducing the frequencies of the received microwave signals to substantially lower frequencies thereby generating intermediate signals, modulating the intermediate signals on a carrier signal having a frequency selected from the predetermined radio frequencies, and coupling the modulated radio signals to a radio frequency antenna (115).
Claim 5
Dependent Claim
38 words
A method as claimed in claim 4 wherein the frequency reducing step comprises the step of generating the intermediate signals having frequencies in a frequency range of the order of the frequency band of the telephone subscriber stations.
Claim 6
Independent Claim
69 words
A method for processing at a reception and radiation site (106) a plurality of radio telecommunications signals having predetermined radio frequencies, comprising the steps of receiving at the site incoming radio signals, reducing the frequencies of the received radio signals to lower frequencies to generate intermediate signals, modulating the intermediate signals on a microwave frequency carrier signal, and coupling the modulated microwave signals to a microwave frequency antenna (114).
Claim 7
Dependent Claim
125 words
Apparatus for providing wireless communications between a main base station (100) of a type capable of being connected to a telephone network (104) and at least one remote reception and radiation site (106) of a type capable of communicating with a plurality of telephone subscriber stations (107,108) CHARACTERISED IN THAT the apparatus comprises means (202) for reducing the frequency of radio signals intended for the telephone subscriber stations to a lower frequency range, means (203) for amplifying the frequency-reduced signals, means (204) for modulating the amplified signals on a microwave frequency carrier signal, means (205) for amplifying the microwave frequency modulated signals, and means (206) for coupling the amplified microwave signal to a microwave antenna (112) for transmission to the remote reception and radiation site.
Claim 8
Dependent Claim
26 words
Apparatus as claimed in claim 7 wherein the lower frequency range is of the order of the frequency band of the remote reception and radiation site.
Claim 9
Dependent Claim
116 words
Apparatus for receiving wireless communications at a main base station (100) of a type capable of being connected to a telephone network (104) from at least one remote reception and radiation site (106) of a type capable of communicating with a plurality of telephone subscriber stations (107,108), CHARACTERISED IN THAT the apparatus comprises means (112) for receiving at the main base station incoming microwave signals, means (207) for amplifying the received microwave signals, means (208) for reducing the frequency of the amplified signals to a substantially lower frequency range, means (209) for amplifying the frequency-reduced signals, and means (210) for modulating the amplified frequency-reduced signals on a radio frequency carrier signal thereby generating radio frequency signals.
Claim 10
Dependent Claim
25 words
Apparatus as claimed in claim 9 wherein the substantially lower frequency range is of the order of the frequency band of the telephone subscriber stations.
Claim 11
Dependent Claim
106 words
A reception and radiation site (106) CHARACTERISED BY a first antenna (115) for transmitting radio signals having frequencies in a first range of frequencies, a second antenna (114) for receiving microwave signals having frequencies in a second range of frequencies that are substantially higher than the frequencies in the first range of frequencies, means (304) coupled to the second antenna for substantially reducing the frequencies of the received microwave signals thereby generating intermediate signals, means (306) coupled to the frequency reducing means for modifying the intermediate signals on a radio frequency carrier signal, and means (308) for coupling the modulated radio signals to the first antenna.
Claim 12
Dependent Claim
105 words
A reception and radiation site (106) CHARACTERISED BY a first antenna (115) for receiving radio signals having frequencies in a first range of frequencies, a second antenna (114) for transmitting microwave signals having frequencies in a second range of frequencies that are substantially higher than the frequencies in the first range of frequencies, means (311) coupled to the first antenna for reducing the frequencies of the received radio signals thereby generating intermediate signals, means (313) coupled to the frequency reducing means for modulating the intermediate signals on a microwave frequency carrier signal, and means (301) for coupling the modulated microwave signals to the second antenna.
Claim 13
Dependent Claim
110 words
A mobile radio reception and radiation cellular site (106) CHARACTERISED BY a first antenna (115) for transmitting mobile radio signals having frequencies in a first range of frequencies, a second antenna (114) for receiving microwave signals having frequencies in a second range of frequencies that are substantially higher than the frequencies in the first range of frequencies, means (304) coupled to the second antenna for substantially reducing the frequencies of the received microwave signals thereby generating intermediate signals, means (306) coupled to the frequency reducing means for modulating the intermediate signals on a radio frequency carrier signal, and means (308) for coupling the modulated radio signals to the first antenna.
Claim 14
Dependent Claim
110 words
A mobile radio reception and radiation cellular site (106) CHARACTERISED BY a first antenna (115) for receiving mobile radio signals having frequencies in a first range of frequencies, a second antenna (114) for transmitting microwave signals having frequencies in a second range of frequencies that are substantially higher that the frequencies in the first range of frequencies, means (311) coupled to the first antenna for reducing the frequencies of the received mobile radio signals thereby generating intermediate signals, means (313) coupled to the frequency reducing means for modulating the intermediate signals on a microwave frequency carrier signal, and means (301) for coupling the modulated microwave signals to the second antenna.
References Cited (Backward Citations)
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