Television signal receiver capable of cancelling linear and non-linear distortion
First Claim
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1. A television signal receiver, comprising:
- a tuner for selecting one channel from a radio frequency (RF) television signal to generate an intermediate frequency (IF) signal;
an IF distortion canceller coupled to the tuner for canceling a signal distortion in the IF signal to generate an IF distortion-cancelled signal, wherein the IF distortion canceller comprises a front-end portion having an input to receive the IF signal and cancel non-linear distortion in the IF signal, wherein the IF distortion canceller further comprising a back-end portion having an input to receive an output of the front-end portion and cancel linear distortion carried in the IF signal, the back-end portion outputting the IF distortion-cancelled signal; and
an IF demodulator coupled to the IF distortion canceller for demodulating the IF distortion-cancelled signal to output a baseband signal.
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Abstract
A television signal receiver comprises: a tuner, an optional IF conditioner, an IF distortion canceller, and an IF demodulator. The tuner selects one channel from a radio frequency television signal to generate an intermediate frequency signal. The IF conditioner outputs an IF conditioned signal. The IF distortion canceller cancels a signal distortion in the IF signal or the IF conditioned signal to generate an IF distortion-cancelled signal. The IF demodulator demodulates the IF distortion-cancelled signal to output a baseband signal.
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Citations
22 Claims
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1. A television signal receiver, comprising:
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a tuner for selecting one channel from a radio frequency (RF) television signal to generate an intermediate frequency (IF) signal; an IF distortion canceller coupled to the tuner for canceling a signal distortion in the IF signal to generate an IF distortion-cancelled signal, wherein the IF distortion canceller comprises a front-end portion having an input to receive the IF signal and cancel non-linear distortion in the IF signal, wherein the IF distortion canceller further comprising a back-end portion having an input to receive an output of the front-end portion and cancel linear distortion carried in the IF signal, the back-end portion outputting the IF distortion-cancelled signal; and an IF demodulator coupled to the IF distortion canceller for demodulating the IF distortion-cancelled signal to output a baseband signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A television signal receiver, comprising:
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a tuner for selecting one channel from a radio frequency (RF) television signal to generate an intermediate frequency (IF) signal; an IF conditioner coupled to the tuner for conditioning the IF signal to generate an IF conditioned signal; an IF distortion canceller coupled to the IF conditioner for canceling a signal distortion in the IF conditioned signal to generate an IF distortion-cancelled signal, wherein the IF distortion canceller comprises a front-end portion having an input to receive the IF conditioned signal and cancel non-linear distortion in the IF signal, wherein the IF distortion canceller further comprising a back-end portion having an input to receive an output of the front-end portion and cancel linear distortion carried in the IF signal, the back-end portion outputting the IF distortion-cancelled signal; and an IF demodulator coupled to the IF distortion canceller for demodulating the IF distortion-cancelled signal to output a baseband signal. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method of receiving a radio frequency (RF) signal, comprising:
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selecting one channel from the RF signal to generate an intermediate frequency (IF) signal; canceling a non-linear signal distortion in the IF signal to generate an intermediate conditioned signal; canceling a linear signal distortion in the intermediate conditioned signal to generate an IF distortion-cancelled signal; and demodulating the IF distortion-cancelled signal to output a baseband signal. - View Dependent Claims (16, 17)
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18. A method of receiving a radio frequency (RF) signal, comprising:
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selecting one channel from the RF signal to generate an intermediate frequency (IF) signal; conditioning the IF signal to generate an IF conditioned signal; canceling a non-linear signal distortion in the IF conditioned signal to generate an intermediate conditioned signal; canceling a linear signal distortion in the intermediate conditioned signal to generate an IF distortion-cancelled signal; and demodulating the IF distortion-cancelled signal to output a baseband signal. - View Dependent Claims (19, 20, 21, 22)
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Specification