ANALOG FRONT-END TRANSMITTER AND A CONNECTION METHOD OF AN X-DIGITAL SUBSCRIBER LINE HAVING A PRE-DISTORTION MECHANISM
First Claim
1. An analog front-end transmitter having a pre-distortion mechanism, comprising:
- a line driver, for receiving an input differential signal and generating an output differential signal wherein the input differential signal comprises a first input signal and a second input signal;
the output differential signal comprises a first output signal and a second output signal;
the line driver receives the first input signal to generate the first output signal and receives the second input signal to generate the second output signal; and
a pre-distortion signal generator, coupled to input ends and output ends of the line driver, wherein the pre-distortion signal generator generates a pre-distortion signal according to a first difference between the first input signal and the first output signal, and a second difference between the second input signal and the second output signal so as to adjust an output of the analog front-end transmitter having a pre-distortion mechanism.
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Accused Products
Abstract
A Pre-distortion mechanism for transmit path non-linearity in xDSL AFE is disclosed in the present invention. The AFE includes a line driver and a pre-distortion signal generator. The line driver receives an input differential signal and generates an output differential signal. The input differential signal includes a first input signal and a second input signal. The output differential signal includes a first output signal and a second output signal. The line driver receives the first input signal to generate the first output signal and receives the second input signal to generate the second output signal. The pre-distortion signal generator is coupled to input ends and output ends of the line driver. The pre-distortion signal generator generates a pre-distortion signal according to a first difference between the first input signal and the first output signal, and a second difference between the second input signal and the second output signal so as to adjust an output state of the analog front-end transmitter having a pre-distortion mechanism.
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Citations
15 Claims
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1. An analog front-end transmitter having a pre-distortion mechanism, comprising:
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a line driver, for receiving an input differential signal and generating an output differential signal wherein the input differential signal comprises a first input signal and a second input signal;
the output differential signal comprises a first output signal and a second output signal;
the line driver receives the first input signal to generate the first output signal and receives the second input signal to generate the second output signal; anda pre-distortion signal generator, coupled to input ends and output ends of the line driver, wherein the pre-distortion signal generator generates a pre-distortion signal according to a first difference between the first input signal and the first output signal, and a second difference between the second input signal and the second output signal so as to adjust an output of the analog front-end transmitter having a pre-distortion mechanism. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A connection method of an x-Digital Subscriber Line, comprising:
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providing an x-Digital Subscriber Line to detect a length of connection; executing handshaking of the x-Digital Subscriber Line to define a plan of online signal power and bandwidths; providing an analog front-end transmitter having a pre-distortion mechanism to generate a pre-distortion table and selecting a pre-distortion value from the pre-distortion table according to current online signals; and providing a digital signal processor to adjust a difference between input and output signals of a line driver of the analog front-end transmitter having a pre-distortion mechanism according to the pre-distortion value. - View Dependent Claims (14)
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15. A method for adjusting an output of an analog front-end transmitter having a pre-distortion mechanism, comprising:
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receiving an input differential signal and generating an output differential signal wherein the input differential signal comprises a first input signal and a second input signal;
the output differential signal comprises a first output signal and a second output signal;receiving the first input signal to generate the first output signal; receiving the second input signal to generate the second output signal; and generating a pre-distortion signal according to a first difference between the first input signal and the first output signal, and a second difference between the second input signal and the second output signal so as to adjust the output of the analog front-end transmitter having a pre-distortion mechanism.
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Specification