OFDM guard band communication apparatus and method
First Claim
Patent Images
1. A transmitting apparatus comprising:
- an inverse Fourier transformer that performs an inverse Fourier transform on transmit data converted to parallel form to obtain a first signal;
a spreader that spreads a second signal;
a first filter that limits the band of the spread second signal to a guard frequency band adjacent to the band of the first signal; and
a transmitter that transmits a signal comprising the first and second signals.
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Abstract
A transmitting apparatus and method may inverse Fourier transform transmit data converted to parallel form to obtain a first signal. The band of a second signal is limited to a guard frequency band adjacent to the band of the first signal, and a signal comprising the first and second signals is transmitted.
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Citations
15 Claims
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1. A transmitting apparatus comprising:
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an inverse Fourier transformer that performs an inverse Fourier transform on transmit data converted to parallel form to obtain a first signal; a spreader that spreads a second signal; a first filter that limits the band of the spread second signal to a guard frequency band adjacent to the band of the first signal; and a transmitter that transmits a signal comprising the first and second signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A communication terminal apparatus equipped with a transmitting apparatus, the transmitting apparatus comprising:
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an inverse Fourier transformer that performs an inverse Fourier transform on transmit data converted to parallel form to obtain a first signal; a spreader that spreads a second signal; a first filter that limits the band of the spread second signal to a guard frequency band adjacent to the band of the first signal; and a transmitter that transmits a signal comprising the first and second signals. - View Dependent Claims (10)
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11. A base station apparatus equipped with a transmitting apparatus, the transmitting apparatus comprising:
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an inverse Fourier transformer that performs an inverse Fourier transform on transmit data converted to parallel form to obtain a first signal; a spreader that spreads a second signal; a first filter that limits the band of the spread second signal to a guard frequency band adjacent to the band of the first signal; and a transmitter that transmits a signal comprising the first and second signals. - View Dependent Claims (12)
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13. A data transmission method comprising:
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inverse Fourier transforming transmit data converted to parallel form to obtain a first signal; spreading a second signal; limiting the band of the spread second signal to a guard frequency band adjacent to the band of the first signal; transmitting a signal comprising the first and second signals; Fourier transforming the first signal and extracting the transmit data; and demodulating the guard frequency band of the transmitted signal to extract the second signal. - View Dependent Claims (14, 15)
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Specification