Apparatus method and computer program for configurable radio-frequency front end filtering
First Claim
1. A circuit comprising:
- a diplexer having a first port interfacing a first node of the circuit to a common port of the diplexer through at least one frequency adjustable first filter disposed along a first radio branch, and a second port interfacing a second node of the circuit to the common port through at least one frequency adjustable second filter disposed along a second radio branch;
wherein at least one of the first and second filters has a control signal input configured to change at least one of a filtering frequency and filtering attenuations according to control signal input thereto.
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Accused Products
Abstract
A radio use case is determined for concurrently operating radios of a multi-radio device and/or transmitter and receiver of a FDD radio. A local memory is accessed with the determined use case to find a high and/or a low frequency cutoff for the concurrent operation radio or transmitter/receiver. Control signals are applied to impose the high and/or the low frequency cutoff to a pair of frequency adjustable diplexers that are in series with one another in one of a transmit branch or a receive branch of a duplexer circuit that is disposed between the radio and an antenna. Then, a receive signal is passed through the antenna and the receive branch of the duplexer circuit to the radio or receiver of the FDD radio, or a transmit signal is passed from the respective radio or transmitter of the FDD radio through the transmit branch of the duplexer circuit to the antenna.
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Citations
25 Claims
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1. A circuit comprising:
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a diplexer having a first port interfacing a first node of the circuit to a common port of the diplexer through at least one frequency adjustable first filter disposed along a first radio branch, and a second port interfacing a second node of the circuit to the common port through at least one frequency adjustable second filter disposed along a second radio branch; wherein at least one of the first and second filters has a control signal input configured to change at least one of a filtering frequency and filtering attenuations according to control signal input thereto. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method comprising:
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determining a radio use case for a radio; accessing a memory with the determined use case to find at least one of a high frequency cutoff, a low frequency cutoff and filtering attenuations; applying control signals to impose the at least one of the high frequency cutoff, the low frequency cutoff and the filtering attenuations to at least one of a first frequency adjustable filter that is disposed along a first radio branch and a second adjustable filter that is disposed along a second radio branch that is parallel to the first radio branch, each of the first and second radio branches interfaces to a diplexer; and passing a communication signal between the diplexer and the first or second radio branch through the at least one filter to which the control signals are applied. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A memory embodying a program of computer readable instructions executable by a digital data processor to perform actions directed toward controlling frequency filtering, the actions comprising:
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determining a radio use case for a radio; from the determined use case, finding in a stored database at least one of a high frequency cutoff, a low frequency cutoff and filtering attenuations for at least one frequency adjustable filter; and applying control signals to impose the at least one of the high frequency cutoff, the low frequency cutoff and the filtering attenuations to at least one of a first frequency adjustable filter disposed along a first radio branch or a second frequency adjustable filter disposed along a second radio branch that is parallel to the first radio branch, each of the first and second radio branches interfacing to a diplexer. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. An apparatus comprising:
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means for interfacing a first node through a first frequency adjustable filtering means disposed in along a first radio branch, and for interfacing a second node through a second frequency adjustable filtering means disposed along a second radio branch; wherein at least one of the first and second frequency adjustable filtering means has input means for receiving control signals that operate to change at least one of a filtering frequency and an attenuation thereof. - View Dependent Claims (25)
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Specification