Patent EP0715478A2 successfully refreshed from Google Patents.
EP0715478A2
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EP
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Low power, short range point-to-multipoint communications system
Assignee: Bosch Telecom GmbH
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Filing: 1995-11-28
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Granted: —
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Expires: 2015-11-28
Abstract
Abstract A point-to-multipoint or two-way communications system is provided by a nodal transmitter located in a node with a plurality of nodal antennas radiating different polarization signals about the node. The system includes subscriber stations with directional antennas adapted to receive signals radiated from the nodal transmitter. The system may additionally include capability for transmitting and radiating subscriber signals to the nodal transmitter location for two-way communications.
Inventors
- 👤 J. Leland Langston
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 19:56
CPC Classifications
H; H04; H04W; H04W16/00; H04W16/24; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/246; H01Q21/00; H01Q21/28; H01Q3/00; H01Q3/26; H04B; H04B7/00; H04B7/24; H04B7/26; H04B7/2603; H04B7/2609; H04W52/00; H04W52/02; H04W52/0209; H04W52/0212; H04W52/0219; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
82 words
A communication system comprising: a transceiver located within a nodal area; a plurality of first antennas coupled to the transceiver and adapted to radiate a communication signal into predetermined regions within the nodal area, the first antennas being arranged such that the polarisation of the communication signal radiated into adjacent regions of the nodal area are dis-similar; and a plurality of subscriber stations each having a second antenna polarised to receive the communication signal from an associated one of the first antennas.
Claim 2
Dependent Claim
12 words
The system according to Claim 1, wherein the first antennas are uni-directional.
Claim 3
Independent Claim
34 words
The system according to Claims 1-2, wherein the plurality of first antennas are arranged such that the communication signals radiated into adjacent regions of the nodal area are either one of two polarisation types.
Claim 4
Independent Claim
31 words
The system according to Claims 1-3, wherein the first antennas are arranged such that each first antenna radiates the communication signal into one of the predetermined regions of the nodal area.
Claim 5
Independent Claim
48 words
The system according to Claims 3-4, wherein the first antennas are arranged such that the communication signal radiated into any one of the predetermined regions of the nodal area is of an opposite polarisation type to the communication signal radiated into an adjacent region of the nodal area.
Claim 6
Independent Claim
29 words
The system according to any preceding claim, wherein the first antennas are arranged such that the radiated communication signal may be received in any region within the nodal area.
Claim 7
Independent Claim
25 words
The system according to any preceding claim, wherein the communication signals radiated by first antennas to adjacent regions of the nodal area are othogonally polarised.
Claim 8
Independent Claim
28 words
The system according to Claims 3-7, wherein the communication signals radiated into adjacent regions of the nodal area have polarisation angles of +45° and -45° (i.e 315°) respectively.
Claim 9
Independent Claim
16 words
The system according to any preceding claim, wherein four first antennas are associated with the transceiver.
Claim 10
Dependent Claim
25 words
The system according to Claim 9, wherein the first antenna radiates the communication signal in an arc of approximately 90 degrees in the horizontal plane
Claim 11
Independent Claim
28 words
The system according to any preceding claim, wherein the first antennas radiate the communication signal such that it has a divergence of approximately 10 degrees from the horizontal.
Claim 12
Independent Claim
18 words
The system according to any preceding claim, wherein the first antennas comprises a vertical array of radiating elements.
Claim 13
Independent Claim
30 words
The system according to Claims 1-11, wherein the first antennas comprise a plurality of vertical arrays of radiating elements, each array radiating a communication signal over a different frequency band.
Claim 14
Independent Claim
56 words
The system according to Claims 1-13, wherein the transceiver comprises; means for generating a set of carrier frequencies for each of said plurality of first antennas; and means for modulating the carrier frequencies with a data signal for transmission to a region of the nodal area such that spatial, frequency and polarisation re-use techniques are provided.
Claim 15
Dependent Claim
30 words
The system according to Claim 14, wherein the transceiver transmits over a plurlity of carrier frequency channels, a linear array of radiating elements being provided for each carrier frquency channel.
Claim 16
Independent Claim
16 words
The system according to Claims 14-15, wherein the data signal includes digital time division multiplexed signals.
Claim 17
Independent Claim
15 words
The system according to Claims 14-15, wherein the data signal includes code division multiplexed signals.
Claim 18
Independent Claim
42 words
The system according to any preceding claim, wherein each subscriber station further comprises; a transmitter for transmitting a subscriber signal on a subscriber carrier frequency, the subscriber signal having an opposite polarisation to the communication signal received from the associated first antenna.
Claim 19
Dependent Claim
17 words
The system according to Claim 18, wherein each first antenna is adapted to receive the subscriber signal.
Claim 20
Independent Claim
21 words
The system of according to Claims 18-19, wherein the transceiver is arranged to receive information transmitted by an associated subscriber station.
Claim 21
Dependent Claim
24 words
A communication network comprising: a distribution center for providing a source of communication signals; and a plurality of communication systems according to Claims 1-20.
Claim 22
Dependent Claim
20 words
The network according to Claim 21, wherein the distribution center is in communication with each communication system via a cable.
Claim 23
Dependent Claim
14 words
The network according to Claim 22, wherein the cable is a fibre optic cable.
Claim 24
Dependent Claim
21 words
The network according to Claim 21, wherein the distribution center is in communication with each communication system via a microwave link.
References Cited (Backward Citations)
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