Cross-talk cancellation in a multiband transceiver
First Claim
1. A multiband transceiver apparatus, comprising:
- a first transmit path operable to transmit a first transmit signal in a first radio frequency band, wherein the first transmit path comprises an input, an output, and a first up-converter operable to convert a first baseband transmit signal to a first up-converted transmit signal in the first radio frequency band and a first feedback path from the output towards the input of the first transmit path, wherein the first feedback path includes a first down-converter operable to convert the first up-converted transmit signal to a first down-converted signal in the baseband or in a first intermediate frequency band below the first radio frequency band;
a second transmit path operable to transmit a second signal in a second radio frequency band, the second radio frequency band being different from the first radio frequency band, wherein the second transmit path comprises an input, an output, and a second up-converter operable to convert a second baseband transmit signal to a second up-converted transmit signal in the second radio frequency band, and a second feedback path from the output towards the input of the second transmit path, wherein the second feedback path includes a second down-converter operable to convert the second up-converted transmit signal to a second down-converted signal in the baseband or in a second intermediate frequency band below the second radio frequency band; and
a cross-talk canceller operable to cancel cross-talk from the second feedback path to the first feedback path and/or to cancel cross-talk from the first feedback path to the second feedback path of the multiband transceiver apparatus.
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Accused Products
Abstract
Embodiments relate to a multiband transceiver apparatus (100), comprising a first transmit path (110) operable to transmit a first transmit signal (sig1) in a first radio frequency band (RF1), wherein the first transmit path (110) comprises an input (112), an output (114) and a first feedback path (116) from the output towards the input of the first transmit path, a second transmit path (130) operable to transmit a second signal (sig2) in a second radio frequency band (RF2), the second radio frequency band (RF2) being different from the first radio frequency band (RF1), wherein the second transmit path (130) comprises an input (132), an output (134) and a second feedback path (136) from the output towards the input of the second transmit path, and a cross-talk canceller (150) operable to cancel cross-talk from the second feedback path (136) to the first feedback path (116) and/or to cancel cross-talk from the first feedback path (116) to the second feedback path (136) of the multiband transceiver apparatus (100).
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Citations
14 Claims
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1. A multiband transceiver apparatus, comprising:
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a first transmit path operable to transmit a first transmit signal in a first radio frequency band, wherein the first transmit path comprises an input, an output, and a first up-converter operable to convert a first baseband transmit signal to a first up-converted transmit signal in the first radio frequency band and a first feedback path from the output towards the input of the first transmit path, wherein the first feedback path includes a first down-converter operable to convert the first up-converted transmit signal to a first down-converted signal in the baseband or in a first intermediate frequency band below the first radio frequency band; a second transmit path operable to transmit a second signal in a second radio frequency band, the second radio frequency band being different from the first radio frequency band, wherein the second transmit path comprises an input, an output, and a second up-converter operable to convert a second baseband transmit signal to a second up-converted transmit signal in the second radio frequency band, and a second feedback path from the output towards the input of the second transmit path, wherein the second feedback path includes a second down-converter operable to convert the second up-converted transmit signal to a second down-converted signal in the baseband or in a second intermediate frequency band below the second radio frequency band; and a cross-talk canceller operable to cancel cross-talk from the second feedback path to the first feedback path and/or to cancel cross-talk from the first feedback path to the second feedback path of the multiband transceiver apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for operating a multiband transceiver, comprising:
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transmitting, via a first transmit path, a first transmit signal in a first radio frequency band, wherein the first transmit path comprises an input, an output and a first up-converter operable to convert a first baseband transmit signal to a first up-converted transmit signal in the first radio frequency band, and a first feedback path from the output towards the input of the first transmit path, with a first down-converter operable to convert the first up-converted transmit signal to a first down-converted signal in the baseband or in a first intermediate frequency band below the first radio frequency band; transmitting, via a second transmit path, a second signal in a second radio frequency band, the second radio frequency band being different from the first radio frequency band, wherein the second transmit path comprises an input, an output, and a second up-converter operable to convert a second baseband transmit signal to a second up-converted transmit signal in the second radio frequency band and a second feedback path from the output towards the input of the second transmit path, with a second down-converter operable to convert the second up-converted transmit signal to a second down-converted signal in the baseband or in a second intermediate frequency band below the second radio frequency band; and cancelling cross-talk from the second feedback path to the first feedback path and/or to cancel cross-talk from the first feedback path to the second feedback path of the multiband transceiver. - View Dependent Claims (14)
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Specification