Activation method of communications apparatus with a non-linear distortion compensation device
First Claim
1. An activation method of a communications apparatus that have both a feedback loop and a non-linear distortion compensation device with a function to generate/update a distortion compensation coefficient, comprising:
- (a) opening the feedback loop;
(b) adjusting both a level and a phase of an analog signal of the communications apparatus;
(c) closing the feedback loop; and
(d) generating/updating the distortion compensation coefficient.
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Accused Products
Abstract
First, a digital section constituting a linearizer is activated. Then, a feedback loop for updating a distortion compensation coefficient is opened. Then, the analog section on the antenna side is activated from an ADC, including a PA, etc., or a DAC. Then, both the ATT value of an ATT installed in a feedback route for updating the distortion compensation coefficient and the signal delay amount of a signal delay unit are adjusted to make a state such that the distortion compensation coefficient can be accurately updated. Then, the feedback loop is closed, a distortion compensation table having the distortion compensation coefficient as an entry is generated and after the generation is completed, the operation shifts to the normal operation.
77 Citations
16 Claims
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1. An activation method of a communications apparatus that have both a feedback loop and a non-linear distortion compensation device with a function to generate/update a distortion compensation coefficient, comprising:
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(a) opening the feedback loop;
(b) adjusting both a level and a phase of an analog signal of the communications apparatus;
(c) closing the feedback loop; and
(d) generating/updating the distortion compensation coefficient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification