APPARATUS FOR MULTI CARRIER AGGREGATION IN A SOFTWARE DEFINED RADIO
First Claim
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1. An apparatus comprising:
- an antenna for receiving a first RF signal, a second RF signal, a third RF signal and a fourth RF signal;
a first bank of delta sigma analog to digital converters having a first delta sigma analog to digital converter for generating a first digital signal and a second delta signal analog to digital converter for generating a second digital signal;
a second bank of delta sigma analog to digital converters having a third delta sigma analog to digital converter for generating a third digital signal and a fourth delta signal analog to digital converter for generating a fourth digital signal;
a first multiplexer having a first passband and a second passband, wherein the first multiplexer is operative to couple the first RF signal to a first delta sigma analog to digital converter, where the first RF signal has a first center frequency within the first passband, and wherein the first multiplexer is further operative to couple the second RF signal to a second delta sigma analog to digital converter, where the second RF signal has a second center frequency within the second passband;
a second multiplexer having a third passband and a fourth passband, wherein the second multiplexer is operative to couple the third RF signal to a third delta sigma analog to digital converter, where the third RF signal has a third center frequency within the third passband, and wherein the first multiplexer is further operative to couple the fourth RF signal to a fourth delta sigma analog to digital converter, where the fourth RF signal has a fourth center frequency within the fourth passband;
a first switch for coupling the first RF signal and the second RF signal to the first multiplexer and for coupling the third RF signal and the fourth RF signal to the second multiplexer;
a processor for generating a communications data in response to at least one of the first digital signal, the second digital signal, the third digital signal and the fourth digital signal to the processor; and
a second switch for coupling at least one of the first digital signal, the second digital signal, the third digital signal and the fourth digital signal to the processor.
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Abstract
A apparatus for dynamically modifying filter characteristics of a delta-sigma modulator in order to receive and transmit radio frequency signals over a wide frequency range. The system is used for wide bandwidth radio system designed to adapt to various global radio standards and, more particularly, to a cellular radio architecture that employs a combination of a single circulator, programmable band-pass sampling radio frequency (RF) front-end and optimized digital baseband that is capable of supporting all current cellular wireless access protocol frequency bands.
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Citations
20 Claims
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1. An apparatus comprising:
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an antenna for receiving a first RF signal, a second RF signal, a third RF signal and a fourth RF signal; a first bank of delta sigma analog to digital converters having a first delta sigma analog to digital converter for generating a first digital signal and a second delta signal analog to digital converter for generating a second digital signal; a second bank of delta sigma analog to digital converters having a third delta sigma analog to digital converter for generating a third digital signal and a fourth delta signal analog to digital converter for generating a fourth digital signal; a first multiplexer having a first passband and a second passband, wherein the first multiplexer is operative to couple the first RF signal to a first delta sigma analog to digital converter, where the first RF signal has a first center frequency within the first passband, and wherein the first multiplexer is further operative to couple the second RF signal to a second delta sigma analog to digital converter, where the second RF signal has a second center frequency within the second passband; a second multiplexer having a third passband and a fourth passband, wherein the second multiplexer is operative to couple the third RF signal to a third delta sigma analog to digital converter, where the third RF signal has a third center frequency within the third passband, and wherein the first multiplexer is further operative to couple the fourth RF signal to a fourth delta sigma analog to digital converter, where the fourth RF signal has a fourth center frequency within the fourth passband; a first switch for coupling the first RF signal and the second RF signal to the first multiplexer and for coupling the third RF signal and the fourth RF signal to the second multiplexer; a processor for generating a communications data in response to at least one of the first digital signal, the second digital signal, the third digital signal and the fourth digital signal to the processor; and a second switch for coupling at least one of the first digital signal, the second digital signal, the third digital signal and the fourth digital signal to the processor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus comprising:
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an input for receiving a first RF signal and a second RF signal; a power amplifier for amplifying the first RF signal and the second RF signal; a source of an LO signal; a mixer for generating a first IF signal in response to the first RF signal and the LO signal and a second IF signal in response to the second RF signal and the LO signal; a first delta sigma analog to digital converter to generate a first digital signal in response to the first IF signal; a second delta sigma analog to digital converter to generate a second digital signal in response to the second IF signal; and a multiplexer having a first passband and a second passband, wherein the first multiplexer is operative to couple the first IF signal to the first delta sigma analog to digital converter, where the first IF signal has a first center frequency within the first passband, and wherein the first multiplexer is further operative to couple the second IF signal to the second delta sigma analog to digital converter, where the second IF signal has a second center frequency within the second passband. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An apparatus comprising:
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an antenna for transmitting a first amplified RF signal and a second amplified RF signal; a processor for generating a first digital signal in response to a data packet; a delta signal digital to analog converter for converting the first RF signal into a first RF signal in response to a first control signal and a second RF signal in response to a second control signal; a first amplifier for amplifying the first RF signal to generate the first amplified RF signal; a second amplifier for amplifying the second RF signal to generate the second amplified RF signal; a first multiplexer for filtering the first amplified RF signal; a second multiplexer for filtering the second amplified RF signal; and an RF switch for coupling the first amplified RF signal and the second amplified RF signal to the antenna. - View Dependent Claims (18, 19, 20)
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Specification