Patent CA1007121A successfully refreshed from Google Patents.
Patent US4931802A successfully refreshed from Google Patents.
US4931802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple spot-beam systems for satellite communications
Assignee: VIZADA Inc
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Filing: 1988-03-11
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Granted: 1990-06-05
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Expires: 2008-03-11
Abstract
Abstract On-board satellite switching is performed in three stages, an outer stage of switching on the up-link side for routing the received signals to either demodulators or frequency translators, a first inner stage of switching, preferably a baseband switch and processor, for routing and processing the outputs of the demodulators, a second inner stage of switching, e.g., a microwave switch matrix, for routing the outputs of the frequency translators, and an outer stage on the down-link side for assembling and routing the down-link spot beams. For a multiple hopping-beam system, the outer stages are microwave switch matrices, and for a hybrid scanning-hopping system the outer stages are beam forming matrices. A general purpose modified rearrangeable switch matrix is also disclosed.
Inventors
- 👤 Francois T. Assal
- 👤 John V. Evans
- 👤 Christoph E. Mahle
- 👤 Amir I. Zaghloul
- 👤 Ramesh K. Gupta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:32
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/185; H04B7/1851; H04B7/18515; H04B7/204; H04B7/2046; H04Q2213/00; H04Q2213/1302; H04Q2213/1304; H04Q2213/13107; H04Q2213/13292; H04Q2213/13333; H04Q2213/13396
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
443 words
A communications relay apparatus of the type including receive means for receiving communications over a plurality of receiving channels transmit means for transmitting communications over a plurality of transmit channels, and means for routing communications received over any of said receiving channels to any of said transmit channels, said relay apparatus comprising: first receive outer switching means having inputs connected to a first plurality of said receive channels and selectively directing its inputs to any one of at least first and second outputs; at least a first demodulator connected to said first output of said first receive outer switching means for providing demodulated data from at least one of said first and second receive channels; at least a first input means connected to said second output of said first receive outer switching means and for providing modulated data from at least one of said first and second channels; second receive outer switching means having inputs connected to at least third and fourth receive channels and selectively directing its inputs to any one of at least first and second outputs; at least a second demodulator connected to said first output of said second receive outer switching means for providing demodulated data from at least one of said third and fourth receive channels; at least a second input means connected to said second output of said second receive outer switching means and for providing modulated data from at least one of said third and fourth channels; first inner switching means having at least first and second inputs connected to outputs of said first and second demodulators, respectively, said first inner switching means selectively directing demodulated data from its first and second inputs to either of at least first and second outputs of said first inner switching means; second inner switching means having at least first and second inputs connected to outputs of said first and second input means, respectively said second inner switching means selectively directing modulated data from its first and second inputs to either of at least first and second outputs of said second inner switching means; a first remodulation means having an input connected to said first output of said first inner switching means; a first output means connected to said first output of said second inner switching means; and first transmit outer switching means having at least a first input connected to an output of said first remodulation means and a second input connected to said first output means, said first outer transmit switching means selectively directing modulated data from its first and second inputs to either of at least first and second outputs of said first outer transmit switching means.
Claim 2
Dependent Claim
443 words
A communications relay apparatus of the type including receive means for receiving communications over a plurality of receiving channels transmit means for transmitting communications over a plurality of transmit channels, and means for routing communications received over any of said receiving channels to any of said transmit channels, said relay apparatus comprising: first receive outer switching means having inputs connected to a first plurality of said receive channels and selectively directing its inputs to any one of at least first and second outputs; at least a first demodulator connected to said first output of said first receive outer switching means for providing demodulated data from at least one of said first and second receive channels; at least a first input means connected to said second output of said first receive outer switching means and for providing modulated data from at least one of said first and second channels; second receive outer switching means having inputs connected to at least third and fourth receive channels and selectively directing its inputs to any one of at least first and second outputs; at least a second demodulator connected to said first output of said second receive outer switching means for providing demodulated data from at least one of said third and fourth receive channels; at least a second input means connected to said second output of said second receive outer switching means and for providing modulated data from at least one of said third and fourth channels; first inner switching means having at least first and second inputs connected to outputs of said first and second demodulators, respectively, said first inner switching means selectively directing demodulated data from its first and second inputs to either of at least first and second outputs of said first inner switching means; second inner switching means having at least first and second inputs connected to outputs of said first and second input means, respectively said second inner switching means selectively directing modulated data from its first and second inputs to either of at least first and second outputs of said second inner switching means; a first remodulation means having an input connected to said first output of said first inner switching means; a first output means connected to said first output of said second inner switching means; and first transmit outer switching means having at least a first input connected to an output of said first remodulation means and a second input connected to said first output means, said first outer transmit switching means selectively directing modulated data from its first and second inputs to either of at least first and second outputs of said first outer transmit switching means.
Claim 3
Dependent Claim
17 words
An apparatus as defined in claim 1, wherein said first and second input means comprise frequency translators.
Claim 4
Dependent Claim
16 words
An apparatus as defined in claim 1 wherein said first output means comprises a frequency translator.
Claim 5
Dependent Claim
16 words
An apparatus as defined in claim 1 wherein said first output means comprises a direct connection.
Claim 6
Dependent Claim
31 words
An apparatus as defined in claim 1, wherein said first and second channels are in a first frequency band and said third and fourth channels are in a second frequency band.
Claim 7
Dependent Claim
27 words
An apparatus as defined in claim 1, wherein said apparatus comprises a multiple hopping-beam satellite and said receive and transmit outer switching means comprise microwave switch matrices.
Claim 8
Dependent Claim
54 words
An apparatus as defined in claim 6, further comprising first redundant connection means connected between a plurality of up-link antennas and the inputs to each of said receive outer switching means, and second redundant connection means connected between the outputs of each of said transmit outer switching means and a plurality of down-link antennas.
Claim 9
Dependent Claim
34 words
An apparatus as defined in claim 6, wherein said first and second receive outer switching means. first and second inner switching means and first transmit outer switching means collectively form a multistage switch matrix.
Claim 10
Dependent Claim
34 words
An apparatus as defined in claim 6, wherein said first and second receive outer switching means, first and second inner switching means and first transmit outer switching means collectively form a rearrangeable switch matrix.
Claim 11
Dependent Claim
27 words
An apparatus as defined in claim 9, wherein said rearrangeable switch matrix includes a plurality of (4×4) switch matrices each of which comprises a crossbar switch matrix.
Claim 12
Dependent Claim
19 words
An apparatus as defined in claim 10, wherein each of said β switching elements comprises a double-pole-double-throw (DPDT) switch.
Claim 13
Dependent Claim
26 words
An apparatus as defined in claim 6, wherein each of said first and second receive outer switching means and said first transmit outer switching means matrix.
Claim 14
Dependent Claim
27 words
An apparatus as defined in claim 12, wherein said rearrangeable switch matrix includes a plurality of (4×4) switch matrices each of which comprises a crossbar switch matrix.
Claim 15
Dependent Claim
31 words
An apparatus as defined in claim 6, wherein said first input means translates the signal from said second output of said first receive outer switching means to a desired down-link frequency.
Claim 16
Dependent Claim
73 words
An apparatus as defined in claim 1, further comprising a second transmit outer switching means having first and second inputs and outputs, a second remodulation mean coupling said second output of said first inner switching means to said first input of said second transmit outer switching means and a second output means connecting said second output of said second inner switching means to said second input of said second transmit outer switching means.
Claim 17
Dependent Claim
19 words
An apparatus as defined in claim 1 wherein said first inner switching means comprises a baseband switch and processor.
Claim 18
Dependent Claim
18 words
An apparatus as defined in claim 16, wherein said second inner switching means comprises a microwave switch matrix.
Claim 19
Dependent Claim
443 words
A communications relay apparatus of the type including receive means for receiving communications over a plurality of receiving channels, transmit means for transmitting communications over a plurality of transmit channels, and means for routing communications received over any of said receiving channels to any of said transmit channels, said relay apparatus comprising: first receive outer routing means having inputs connected to a first plurality of said receive channels and selectively directing its inputs to any one of at least first and second outputs; at least a first demodulator connected to said first output of said first receive outer routing means for providing demodulated data from at least one of said first and second receive channels; at least a first input means connected to said second output of said first receive outer routing means and for providing modulated data from at least one of said first and second channels; second receive outer routing means having inputs connected to at least third and fourth receive channels and selectively directing its inputs to any one of at least first and second outputs; at least a second demodulator connected to said first output of said second receive outer routing means for providing demodulated data from at least one of said third and fourth receive channels; at least a second input means connected to said second output of said second receive outer routing means and for providing modulated data from at least one of said third and fourth channels; first inner switching means having at least first and second inputs connected to outputs of said first and second demodulators, respectively, said first inner switching means selectively directing demodulated data from its first and second inputs to either of at least first and second outputs of said first inner switching means; second inner switching means having at least first and second inputs connected to outputs of said first and second input means, respectively, said second inner switching means selectively directing modulated data from its first and second inputs to either of at least first and second outputs of said second inner switching means; a first remodulation means having an input connected to said first output of said first inner switching means; a first output means connected to said first output of said second inner switching means; and first transmit outer routing means having at least a first input connected to an output of said first remodulation means and a second input connected to said first output means, said first outer transmit routing means selectively directing modulated data from its first and second inputs to either of at least first and second outputs of said first outer transmit routing means.
Claim 20
Dependent Claim
443 words
A communications relay apparatus of the type including receive means for receiving communications over a plurality of receiving channels, transmit means for transmitting communications over a plurality of transmit channels, and means for routing communications received over any of said receiving channels to any of said transmit channels, said relay apparatus comprising: first receive outer routing means having inputs connected to a first plurality of said receive channels and selectively directing its inputs to any one of at least first and second outputs; at least a first demodulator connected to said first output of said first receive outer routing means for providing demodulated data from at least one of said first and second receive channels; at least a first input means connected to said second output of said first receive outer routing means and for providing modulated data from at least one of said first and second channels; second receive outer routing means having inputs connected to at least third and fourth receive channels and selectively directing its inputs to any one of at least first and second outputs; at least a second demodulator connected to said first output of said second receive outer routing means for providing demodulated data from at least one of said third and fourth receive channels; at least a second input means connected to said second output of said second receive outer routing means and for providing modulated data from at least one of said third and fourth channels; first inner switching means having at least first and second inputs connected to outputs of said first and second demodulators, respectively, said first inner switching means selectively directing demodulated data from its first and second inputs to either of at least first and second outputs of said first inner switching means; second inner switching means having at least first and second inputs connected to outputs of said first and second input means, respectively, said second inner switching means selectively directing modulated data from its first and second inputs to either of at least first and second outputs of said second inner switching means; a first remodulation means having an input connected to said first output of said first inner switching means; a first output means connected to said first output of said second inner switching means; and first transmit outer routing means having at least a first input connected to an output of said first remodulation means and a second input connected to said first output means, said first outer transmit routing means selectively directing modulated data from its first and second inputs to either of at least first and second outputs of said first outer transmit routing means.
Claim 21
Dependent Claim
17 words
An apparatus as defined in claim 18, wherein said first and second input means comprise frequency translators.
Claim 22
Dependent Claim
16 words
An apparatus as defined in claim 18 wherein said first output means comprises a frequency translator.
Claim 23
Dependent Claim
16 words
An apparatus as defined in claim 18, wherein said first output means comprises a direct connection.
Claim 24
Dependent Claim
31 words
An apparatus as defined in claim 18, wherein said first and second channels are in a first frequency band and said third and fourth channels are in a second frequency band.
Claim 25
Dependent Claim
31 words
An apparatus as defined in claim 18, wherein said first input means translates the signal from said second output of said first receive outer routing means to a desired down-link frequency.
Claim 26
Dependent Claim
73 words
An apparatus as defined in claim 18, further comprising a second transmit outer routing means having first and second inputs and outputs, a second remodulation means coupling said second output of said first inner switching means to said first input of said second transmit outer routing means and a second output means connecting said second output of said second inner switching means to said second input of said second transmit outer routing means.
Claim 27
Dependent Claim
19 words
An apparatus as defined in claim 18, wherein said first inner switching means comprises a baseband switch and processor.
Claim 28
Dependent Claim
18 words
An apparatus as defined in claim 25, wherein said second inner switching means comprises a microwave switch matrix.
Claim 29
Dependent Claim
28 words
An apparatus as defined in claim 18, wherein said apparatus comprises a multiple hybrid scanning-hopping-beam satellite and said receive and transmit outer routing means comprise beam forming matrices.
Claim 30
Dependent Claim
51 words
An apparatus as defined in claim 27, wherein a total region of coverage by said satellite is divided into a plurality of hopping beam areas and each hopping beam area is covered by a plurality of simultaneously scanning spot beams all generated by a beam forming matrix dedicated to said area.
Claim 31
Dependent Claim
212 words
A communications relay apparatus of the type including receive means for receiving communications over a plurality of receiving channels, transmit means for transmitting communications over a plurality of transmit channels, and means for routing communications received over any of said receiving channels to any of said transmit channels, said means for routing comprising: first means having inputs connected to a first plurality of said receive channels and selectively directing its inputs to any one of at least first and second outputs of said first means; second means having a plurality of inputs and a plurality of outputs and selectively directing its inputs to any one of at least first and second outputs of said second means; third means having a plurality of inputs and a plurality of outputs and selectively directing its inputs to any one of at least first and second outputs of said third means; first coupling means for coupling the outputs of said first means to the inputs of said second means; second coupling means for coupling the outputs of said second means to the inputs of said third means; and at least one of said first and second coupling means including means for changing the frequency of a received signal prior to providing it to a respective input.
Claim 32
Dependent Claim
212 words
A communications relay apparatus of the type including receive means for receiving communications over a plurality of receiving channels, transmit means for transmitting communications over a plurality of transmit channels, and means for routing communications received over any of said receiving channels to any of said transmit channels, said means for routing comprising: first means having inputs connected to a first plurality of said receive channels and selectively directing its inputs to any one of at least first and second outputs of said first means; second means having a plurality of inputs and a plurality of outputs and selectively directing its inputs to any one of at least first and second outputs of said second means; third means having a plurality of inputs and a plurality of outputs and selectively directing its inputs to any one of at least first and second outputs of said third means; first coupling means for coupling the outputs of said first means to the inputs of said second means; second coupling means for coupling the outputs of said second means to the inputs of said third means; and at least one of said first and second coupling means including means for changing the frequency of a received signal prior to providing it to a respective input.
Claim 33
Dependent Claim
22 words
An apparatus as defined in claim 29, further comprising control means for independently controlling each of said first second and third means.
Claim 34
Dependent Claim
22 words
An apparatus as defined in claim 29, wherein said at least one of said first and second coupling means comprises a demodulator.
Claim 35
Dependent Claim
23 words
An apparatus as defined in claim 29 wherein said at least one of said first and second coupling means comprises a frequency translator.
Claim 36
Dependent Claim
24 words
An apparatus as defined in claim 32 wherein said at least one of said first and second coupling means comprises said first coupling means.
Claim 37
Dependent Claim
23 words
An apparatus as defined in claim 29, wherein said first coupling means comprises a demodulator and said second coupling means comprises a remodulator.
Claim 38
Dependent Claim
17 words
An apparatus as defined in claim 34, wherein said first coupling means further comprises a frequency translator.
Claim 39
Dependent Claim
17 words
An apparatus as defined in claim 29, wherein said first and third means comprise microwave switch matrices.
Claim 40
Dependent Claim
18 words
An apparatus as defined in claim 36, wherein said second means comprises a baseband switch and processor means.
Claim 41
Dependent Claim
18 words
An apparatus as defined in claim 29, wherein said second means comprises a baseband switch and processor means.
Claim 42
Dependent Claim
17 words
An apparatus as defined in claim 29, wherein said first and third means comprise beam forming matrices.
Claim 43
Dependent Claim
16 words
An apparatus as defined in claim 39, wherein said second means comprises a microwave switch matrix.
References Cited (Backward Citations)
US4259741A
Cited
US4254385A
Cited
US4355388A
Cited
US4375697A
Cited
US4425639A
Cited
US4813036A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |