Time shared very small aperture satellite terminals
First Claim
1. A time shared power amplifier comprising:
- first data storage means, operative to store a first data signal;
second data storage means, operative to store a second data signal;
control means, responsive to the first storage means to initiate transfer of a stored data signal out of the first storage means and during the transfer to inhibit initiation of transfer of any signal out of the second storage means, and responsive to the second storage means to initiate transfer of a stored data signal out of the second storage means and during the transfer to inhibit initiation of transfer of any signal out of the first storage means;
modulation means, operative to provide a carrier signal, to receive a data signal being transferred out of either storage means, and to modulate the carrier signal with the received data signal, said carrier signal comprising a first frequency when modulated with a data signal from said first storage means and a second frequency when modulated with a data signal from said second storage means; and
a power amplifier, operative to receive any modulated carrier signal from the modulation means and to amplify the same to a desired power level.
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Accused Products
Abstract
A time shared power amplifier for amplifying first and second modulated carrier signals for transmission. The carrier signals are modulated by first and second data signals, respectively. The first and second signals are characterized by bursts of data separated by periods of silence. If either of the data signals is presented for transmission while the other is being transmitted, the later one is stored in a storage buffer until the earlier one has been transmitted. Thus, each signal is transmitted during the other'"'"'s silent periods, and since only one carrier is being transmitted at any given time a much smaller amplifier can be used to amplify the carriers to a given power level than would be required if both carriers had to be transmitted at once.
251 Citations
10 Claims
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1. A time shared power amplifier comprising:
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first data storage means, operative to store a first data signal; second data storage means, operative to store a second data signal; control means, responsive to the first storage means to initiate transfer of a stored data signal out of the first storage means and during the transfer to inhibit initiation of transfer of any signal out of the second storage means, and responsive to the second storage means to initiate transfer of a stored data signal out of the second storage means and during the transfer to inhibit initiation of transfer of any signal out of the first storage means; modulation means, operative to provide a carrier signal, to receive a data signal being transferred out of either storage means, and to modulate the carrier signal with the received data signal, said carrier signal comprising a first frequency when modulated with a data signal from said first storage means and a second frequency when modulated with a data signal from said second storage means; and a power amplifier, operative to receive any modulated carrier signal from the modulation means and to amplify the same to a desired power level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification
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- Resources
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Current AssigneeHughes Electronics Corporation (Rtx Corporation)
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Original AssigneeHughes Aircraft Company (Rtx Corporation)
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InventorsWeinberger, Howard L., Sarraf, Jamal
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Primary Examiner(s)Safourek, Benedict V.
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Assistant Examiner(s)Chin, Stephen
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Application NumberUS07/207,425Time in Patent Office978 DaysField of Search375/5, 375/62, 375/59, 375/60, 455/58, 455/59, 455/60, 455/91, 340/825.08US Class Current375/216CPC Class CodesH04B 7/18517 Transmission equipment in e...
