Cell enhancer for cellular radio telephone system having bandpass filter arrangement
First Claim
1. For use in a cellular radio telephone system, a cell enhancer for enhancing duplex communications between a cell site and a subscriber over diverse radio frequency channels, at least some of said channels being used for voice signals and other channels being used for control information signals for controlling the operation of said system, said cell enhancer comprising:
- A. communications means for receiving signals from and transmitting signals to the cell site over said radio frequency channels and for receiving signals from and transmitting signals to the subscriber over said radio frequency channels, said communications means including;
i. cell site antenna means for converting signals from the cell site between electromagnetic signals and electrical signals;
ii. subscriber antenna means for converting signals from the subscriber between electromagnetic signals and electrical signals;
iii. input duplex means for receiving the electrical signals from the cell site antenna means and said subscriber means and directing them to a common duplex output terminal; and
iv. output duplex means for receiving electrical signals from a duplex input terminal and coupling them to appropriate cell site antenna means or subscriber antenna means for transmission to said cell site or subscriber;
B. duplex filter means including a narrow band filter module means for passing a signal in a channel which carries control information signals and a wide band filter means for passing a signal in a plurality of channels which carry voice signals, said duplex filter means further including;
i. multicoupler means conected to said common output terminal and to the inputs of each of said filter module means for receiving the signals from said input duplex means and coupling them to each of said filter module means; and
ii. combining means connected to the outputs of each of said filter module means and said duplex input terminal for combining the output signals from all of said filter module means into a single output signal coupled to said duplex input terminal.
3 Assignments
0 Petitions
Accused Products
Abstract
A cell enhancer for use by one cellular provider in a cellular radio-telephone system includes a wideband amplifier for amplifying both down-link and up-link signals and a filter system for ensuring that signals outside of the cellular bands are not amplified. The filter system includes a wideband filter that passes at least the voice channels assigned to the cellular provider in the cell and a narrow band filter that passes the paging/access control channel in the cell. By using the filter system, signals outside the band assigned to the cellular provider, and particularly signals in the band assigned to the other cellular provider which may be present in the area, will not be amplified by the cell enhancer.
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Citations
9 Claims
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1. For use in a cellular radio telephone system, a cell enhancer for enhancing duplex communications between a cell site and a subscriber over diverse radio frequency channels, at least some of said channels being used for voice signals and other channels being used for control information signals for controlling the operation of said system, said cell enhancer comprising:
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A. communications means for receiving signals from and transmitting signals to the cell site over said radio frequency channels and for receiving signals from and transmitting signals to the subscriber over said radio frequency channels, said communications means including; i. cell site antenna means for converting signals from the cell site between electromagnetic signals and electrical signals; ii. subscriber antenna means for converting signals from the subscriber between electromagnetic signals and electrical signals; iii. input duplex means for receiving the electrical signals from the cell site antenna means and said subscriber means and directing them to a common duplex output terminal; and iv. output duplex means for receiving electrical signals from a duplex input terminal and coupling them to appropriate cell site antenna means or subscriber antenna means for transmission to said cell site or subscriber; B. duplex filter means including a narrow band filter module means for passing a signal in a channel which carries control information signals and a wide band filter means for passing a signal in a plurality of channels which carry voice signals, said duplex filter means further including; i. multicoupler means conected to said common output terminal and to the inputs of each of said filter module means for receiving the signals from said input duplex means and coupling them to each of said filter module means; and ii. combining means connected to the outputs of each of said filter module means and said duplex input terminal for combining the output signals from all of said filter module means into a single output signal coupled to said duplex input terminal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. For use in a cellular radio telephone system, a cell enhancer for enhancing duplex communications between a cell site and a subscriber over diverse radio frequency channels, at least some of said channels being used for voice signals and other channels being used for control information signals for controlling the operation of said system, said cell enhancer comprising:
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A. communications means for receiving signals from and transmitting signals to the cell site over said radio frequency channels and for receiving signals from and transmitting signals to the subscriber over said radio frequency channels, said communications means including; i. cell site communications means for converting signals from the cell site between electromagnetic signals and electrical signals; ii. subscriber communications means for converting signals from the subscriber between electromagnetic signals and electrical signals; B. duplex filter means including a narrow band up-link band-pass filter and a narrow band down-link band-pass filter both for passing signals in a channel which carries control information signals and a wide band up-link band-pass filter and a wide band down-link band-pass filter both for passing signals in a plurality of channels which carry voice signals, said duplex filter means further including; i. multicoupler means including; (a) up-link multicoupler means connected to said subscriber communications means, said narrow band up-link band-pass filter and said wide band up-link band-pass filter for coupling signals from said subscriber communications means to both said narrow band up-link band-pass filter and said wide band up-link band-pass filter; (b) down-link multicoupler means connected to said cell site communications means, said narrow band down-link band-pass filter and said wide band down-link band-pass filter for coupling signals from said cell site communications means to both said narrow band down-link band-pass filter and said wide band down-link band-pass fiter; ii. combining means including; (a) up-link combining means connected to said cell site communications means, said narrow band up-link band-pass filter and said wide band up-link band-pass filter for combining the output signals from said narrow band up-link band-pass filter and said wide band up-link band-pass filter for coupling to said cell site communications means; and (b) down-link combining means connected to said subscriber communications means, said narrow band down-link band-pass filter and said wide band down-link band-pass filter for combining the output signals from said narrow band down-link band-pass filter and said wide band down-link band-pass filter for coupling to said subscriber communications means. - View Dependent Claims (8, 9)
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Specification