Apparatus and method for correcting DC offset of receiver in multiband-hopping communication system
First Claim
1. A direct current (DC) offset correction apparatus of a receiver in a communication system which hops to a plurality of bands, comprising:
- a controller, which generates and outputs a plurality of DC offset correction signals different from each other for the plurality of bands;
a plurality of digital-to-analog converters (DACs) which receives the plurality of the DC offset correction signals from the controller, and digital-to-analog converts and outputs the plurality of DC offset correction signals;
an analog multiplexer (MUX) which selectively outputs one of the plurality of the DC offset correction signals output from the plurality of the DACs, respectively; and
an adder which adds and outputs an input signal with the DC offset correction signal of the analog MUX.
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Abstract
A DC offset correction apparatus and method of a receiver in a multiband-hopping communication system is provided. The DC offset correction apparatus of the receiver in the communication system which hops to a plurality of bands, includes a controller for generating and outputting a plurality of DC offset correction signals different from each other for the respective bands; a plurality of digital-to-analog converters (DACs) for receiving, digital-to-analog converting and outputting the plurality of the DC offset correction signals from the controller; an analog multiplexer (MUX) for switching to output one of the plurality of the DC offset correction signals output from the plurality of the DACs, respectively; and an adder for adding and outputting an input signal with the output signal of the analog MUX. Accordingly, the DC offset correction apparatus can be implemented by low-speed DACs and the fast analog MUX that are relatively small-sized and low-cost elements.
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Citations
13 Claims
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1. A direct current (DC) offset correction apparatus of a receiver in a communication system which hops to a plurality of bands, comprising:
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a controller, which generates and outputs a plurality of DC offset correction signals different from each other for the plurality of bands;
a plurality of digital-to-analog converters (DACs) which receives the plurality of the DC offset correction signals from the controller, and digital-to-analog converts and outputs the plurality of DC offset correction signals;
an analog multiplexer (MUX) which selectively outputs one of the plurality of the DC offset correction signals output from the plurality of the DACs, respectively; and
an adder which adds and outputs an input signal with the DC offset correction signal of the analog MUX. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A direct current (DC) offset correction method of a receiver in a communication system which hops to a plurality of bands, the method comprising:
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a) generating a plurality of DC offset correction signals different from each other for the plurality of bands;
b) digital-to-analog converting the plurality of the DC offset correction signals, respectively;
c) outputting selectively one of the plurality of the DC offset correction signals which has been converted; and
d) adding an input signal with the DC offset correction signal which has been selectively output. - View Dependent Claims (10, 11, 12, 13)
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Specification