Transmitter for multi-format data
First Claim
1. A data transmitter comprising:
- a first amplitude modulator capable of modulating a first carrier signal based on a first data signal;
a second amplitude modulator capable of modulating a second carrier signal based on a second data signal;
a signal combiner capable of directing towards an output of the data transmitter a combination of the first modulated carrier signal coming from the first amplitude modulator and the second modulated carrier signal coming from the second amplitude modulator;
a data module capable of generating the first data signal and the second data signal with a common modulation pace; and
a signal splitter capable of producing the first carrier signal and the second carrier signal by splitting a source optical signal by directing a first fraction of the source optical signal to a first transmission branch comprising the first amplitude modulator and a second fraction of the source optical signal to a second transmission branch comprising the second amplitude modulator;
wherein in a first operating mode of the data transmitter, the first carrier signal and the second carrier signal are mutually phase-shifted, and the data module generates the first data signal and the second data signal based on different data to produce, at the output of the data transmitter, a modulated signal exhibiting a first constellation of states in a complex plane; and
wherein in a second operating mode of the data transmitter, the data module generates the first data signal and the second data signal correlated with one another based on common data to produce, at the output of the data transmitter, a modulated signal exhibiting a second constellation of states in the complex plane that is more reduced and more dispersed than the first constellation of states; and
wherein the data module comprises a data input interface configured to receive a data flow to be transmitted and a plurality of parallel input lines for receiving parallel incoming flows that compose the data flow to be transmitted, and wherein the data module is capable of selectively disabling a subset of the plurality of parallel input lines in the second operating mode of the data transmitter.
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Accused Products
Abstract
A data transmitter (A, B, C, D) wherein, in a first operating mode, the first and second carrier signals are mutually phase-shifted, and the data module generates said first and second data signals based on different data, so as to produce, at the transmitter'"'"'s output, a modulated signal exhibiting a first constellation of states (A, B, C, D) in a complex plane,
and, in a second operating mode of the transmitter, the data module generates said first and second data signals correlated with one another based on common data, so as to produce, at the transmitter'"'"'s output, a modulated signal exhibiting a second constellation of states (A, D; E, F) in the complex plane that is more reduced and more dispersed then said first constellation of states.
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Citations
17 Claims
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1. A data transmitter comprising:
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a first amplitude modulator capable of modulating a first carrier signal based on a first data signal; a second amplitude modulator capable of modulating a second carrier signal based on a second data signal; a signal combiner capable of directing towards an output of the data transmitter a combination of the first modulated carrier signal coming from the first amplitude modulator and the second modulated carrier signal coming from the second amplitude modulator; a data module capable of generating the first data signal and the second data signal with a common modulation pace; and a signal splitter capable of producing the first carrier signal and the second carrier signal by splitting a source optical signal by directing a first fraction of the source optical signal to a first transmission branch comprising the first amplitude modulator and a second fraction of the source optical signal to a second transmission branch comprising the second amplitude modulator; wherein in a first operating mode of the data transmitter, the first carrier signal and the second carrier signal are mutually phase-shifted, and the data module generates the first data signal and the second data signal based on different data to produce, at the output of the data transmitter, a modulated signal exhibiting a first constellation of states in a complex plane; and wherein in a second operating mode of the data transmitter, the data module generates the first data signal and the second data signal correlated with one another based on common data to produce, at the output of the data transmitter, a modulated signal exhibiting a second constellation of states in the complex plane that is more reduced and more dispersed than the first constellation of states; and wherein the data module comprises a data input interface configured to receive a data flow to be transmitted and a plurality of parallel input lines for receiving parallel incoming flows that compose the data flow to be transmitted, and wherein the data module is capable of selectively disabling a subset of the plurality of parallel input lines in the second operating mode of the data transmitter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A data transmitter comprising:
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a first amplitude modulator configured to modulate a first carrier signal based on a first data signal; a second amplitude modulator configured to modulate a second carrier signal based on a second data signal; a signal combiner configured to direct towards an output of the data transmitter a combination of the first modulated carrier signal coming from the first amplitude modulator and the second modulated carrier signal coming from the second amplitude modulator; and a data module configured to generate the first data signal and the second data signal with a common modulation pace; wherein the data module comprises a data input interface configured to receive a data flow to be transmitted and a processing module configured to process the data flow to be transmitted in order to generate the first data signal and the second data signal, and wherein the processing module comprises a parallel-serial conversion module configured to produce the first data signal and the second data signal based on a plurality of the parallel incoming flows, the plurality of the parallel incoming flows exhibiting a common data rate less than a modulation rate of the first data signal and the second data signal. - View Dependent Claims (15, 16, 17)
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Specification