Orthogonal frequency division multiplexing (OFDM) signal receiver having reduced power consumption
First Claim
1. A signal reception apparatus comprising:
- an antenna which receives an OFDM (Orthogonal Frequency Division Multiplex) signal;
a frequency conversion unit configured to perform frequency conversion on the received OFDM signal to obtain a converted OFDM signal;
an analog-to-digital (A/D) conversion unit configured to perform analog-to-digital conversion on the converted OFDM signal to obtain a first digital OFDM signal;
a setting unit configured to set a first interval of one OFDM symbol interval of the OFDM signal;
a demodulation unit configured to demodulate an OFDM symbol from a second digital OFDM signal corresponding to the first interval, the second digital OFDM signal being included in the first digital signal; and
a power control unit configured to control power supply to the frequency conversion unit and the A/D conversion unit in the first interval, and stop the power supply to at least one of the frequency conversion unit and the A/D conversion unit in a second interval other than the first interval.
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Accused Products
Abstract
A signal reception apparatus is provided that includes an antenna which receives an orthogonal frequency division multiplexing (OFDM) signal, a unit to perform frequency conversion on the received OFDM signal to obtain a converted OFDM signal, a unit to perform analog-to-digital (A/D) conversion on the converted OFDM signal to obtain a first digital OFDM signal, a unit to set a first interval of one OFDM symbol interval of the OFDM signal, a unit to demodulate an OFDM symbol from a second digital OFDM signal corresponding to the first interval, the second digital OFDM signal being included in the first digital signal, and a unit to control power supply to the frequency conversion unit and the A/D conversion unit in the first interval, and stop the power supply to at least one of the frequency conversion unit and the A/D conversion unit in a second interval other than the first interval.
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Citations
19 Claims
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1. A signal reception apparatus comprising:
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an antenna which receives an OFDM (Orthogonal Frequency Division Multiplex) signal; a frequency conversion unit configured to perform frequency conversion on the received OFDM signal to obtain a converted OFDM signal; an analog-to-digital (A/D) conversion unit configured to perform analog-to-digital conversion on the converted OFDM signal to obtain a first digital OFDM signal; a setting unit configured to set a first interval of one OFDM symbol interval of the OFDM signal; a demodulation unit configured to demodulate an OFDM symbol from a second digital OFDM signal corresponding to the first interval, the second digital OFDM signal being included in the first digital signal; and a power control unit configured to control power supply to the frequency conversion unit and the A/D conversion unit in the first interval, and stop the power supply to at least one of the frequency conversion unit and the A/D conversion unit in a second interval other than the first interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification