Method and apparatus for receiving digital television signals using space diversity and beam-forming
First Claim
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1. A method of receiving digital television (TV) signals, the method comprising:
- receiving a plurality of incident data signals at a plurality of antennas;
demodulating the incident data signals;
estimating a channel for at least one of the antennas in response to the demodulated incident data signals;
selecting a main path signal from among the demodulated incident data signals and performing beam-forming on the selected main path signal; and
combining the beam-formed selected main path signal with the demodulated incident data signals to form an output signal.
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Abstract
A receiver that receives radio signals, and a method for the same. The radio signals may be received by a plurality of antennas and then demodulated by respective converter devices, an estimated channel device estimates a channel for at least one antenna and at least one beam-forming device performs beam-forming on a selected main path signal from among the demodulated incident data signals. The output signals from the at least one beam-forming device are combined. The method of receiving the incident data signals may be accomplished by using space diversity.
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Citations
23 Claims
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1. A method of receiving digital television (TV) signals, the method comprising:
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receiving a plurality of incident data signals at a plurality of antennas; demodulating the incident data signals; estimating a channel for at least one of the antennas in response to the demodulated incident data signals; selecting a main path signal from among the demodulated incident data signals and performing beam-forming on the selected main path signal; and combining the beam-formed selected main path signal with the demodulated incident data signals to form an output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of receiving radio signals, the method comprising:
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receiving incident data signals using space diversity; demodulating the incident data signals; estimating a channel for each of a plurality of beam-formers using the demodulated incident data signals and output signals of the plurality of beam-formers; selecting a main path signal from among the demodulated incident data signals, applying a weight to the selected main path signal, and performing beam-forming on the selected main path signal; and delaying each of the output signals of the plurality of beam-formers by a delay time and combining the delayed output signals.
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12. A receiver including a plurality of beam-formers, the receiver comprising:
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a plurality of converters, each of which converts radio signals, received through a corresponding plurality of antennas, into baseband signals; a channel estimator, which receives output signals of the plurality of converters and output signals of the plurality of beam-formers, estimates a channel for each of the corresponding plurality of antennas, and outputs control signals; at least one controller, which receives the output signals of the plurality of beam-formers, delays each of the output signals of the plurality of beam-formers by a delay time in response to a corresponding control signal, and outputs the delayed output signals; and an adder, which combines the output signals of the at least one controller. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A receiver for receiving radio signals, the receiver comprising:
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a converter, which converts the radio signals received through an antenna array into baseband signals and outputs the baseband signals; a plurality of beam-formers, each of which receives the baseband signals of the converter and output signals based on the received baseband signals; a channel estimator, which receives the output baseband signals of the converter and the output signals of each of the plurality of beam-formers and estimates a channel for each of the radio signals; a control circuit, which receives the output signals of each of the plurality of beam-formers and independently controls a delay time of each of the output signals of the plurality of beam-formers based on channel estimation results of the channel estimator; and an adder, which combines output signals of the control circuit. - View Dependent Claims (19)
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20. A receiver, comprising:
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a plurality of beam-formers, each of which performs beam-forming on a main path signal selected from a plurality of demodulated incident signals received and sent through an estimated channel; and an equalizer that removes multi-path signals from the received demodulated incident signals; wherein each of the plurality of beam-formers performs beam-forming in response to a field synchronization signal of a data frame of the selected main path signal, and wherein the equalizer removes the multi-path signals during a payload data period of a data frame contained in each of the multi-path signals.
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21. An apparatus, comprising:
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a plurality of beam-forming devices, wherein each beam-forming device is configured to receive a plurality of demodulated incident data signals, to select a main path signal having a better channel characteristic from among the plurality of demodulated incident data signals, and to perform beam-forming on the selected main path signal; and a plurality of controllers that receive output signals of the plurality of beam-forming devices, wherein each of the controllers controls a delay time, a gain, or the delay time and the gain for a respective output signal in response to a corresponding control signal.
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22. An apparatus, comprising:
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a channel estimator device configured to receive a plurality of demodulated incident data signals from a plurality of antennas and at least one output signal from at least one beam-forming device, to estimate a channel for at least one of the plurality of antennas, and to send a control signal to a control circuit coupled to the at least one beam-forming device; wherein the control signal includes at least one of timing and gain information.
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23. An apparatus, comprising:
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a channel estimator device configured to receive a plurality of demodulated incident data signals from a plurality of antennas and at least one output signal from at least one beam-forming device, to estimate a channel for at least one of the plurality of antennas, and to send a control signal to a control circuit coupled to the at least one beam-forming device; wherein the control signal includes at least one of timing and gain information, and wherein the at least one beam-forming device is configured to receive the plurality of demodulated incident data signals, to select a main path signal having a better channel characteristic from among the plurality of demodulated incident data signals, and to perform beam-forming on the selected main path signal.
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Specification