Transmission apparatus, reception apparatus, transmission method, and reception method
First Claim
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1. A transmission apparatus comprising:
- mapping circuitry, which, in operation, maps frequency components of an analog signal at equally spaced discrete locations within a transmission frequency band;
multiplexing circuitry, which, in operation, time-division multiplexes the analog signal and a preamble signal to generate a transmission signal, the preamble signal being a digital signal whose frequency components are continuously mapped over the transmission frequency band; and
a transmitter, which, in operation, transmits the transmission signal, the transmission signal having an autocorrelation value to be used for timing synchronization at a reception apparatus that receives the transmission signal.
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Abstract
In a transmission apparatus, a mapper maps frequency components of an analog signal at equally spaced discrete locations within a transmission frequency band, a time-division multiplexer time-division multiplexes the analog signal and a preamble signal to generate a transmission signal, the preamble signal being a digital signal whose frequency components are continuously mapped over the transmission frequency band, and a transmitter transmits the transmission signal, wherein an autocorrelation value of the transmission signal being to be used for timing synchronization at a reception apparatus that receives the transmission signal.
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Citations
8 Claims
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1. A transmission apparatus comprising:
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mapping circuitry, which, in operation, maps frequency components of an analog signal at equally spaced discrete locations within a transmission frequency band; multiplexing circuitry, which, in operation, time-division multiplexes the analog signal and a preamble signal to generate a transmission signal, the preamble signal being a digital signal whose frequency components are continuously mapped over the transmission frequency band; and a transmitter, which, in operation, transmits the transmission signal, the transmission signal having an autocorrelation value to be used for timing synchronization at a reception apparatus that receives the transmission signal. - View Dependent Claims (2, 3, 4, 5)
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6. A reception apparatus comprising:
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a receiver, which, in operation, receives a signal that is generated at a communication partner apparatus by time-division multiplexing an analog signal and a preamble signal, the analog signal having its frequency components mapped at equally spaced discrete locations within a transmission frequency band, the preamble signal being a digital signal having its frequency components continuously mapped over the transmission frequency band; control circuitry, which, in operation, achieves timing synchronization using an autocorrelation value of the received signal; demultiplexing circuitry, which, in operation, demultiplexes the received signal into the analog signal and the preamble signal based on a result of the timing synchronization; estimating circuitry, which, in operation, estimates a channel response by using the preamble signal; mapping circuitry, which, in operation, maps the frequency components of the analog signal at continuous locations in a part of the transmission frequency band; and equalizing circuitry, which, in operation, performs frequency-domain equalization by using the estimated channel response on the analog signal whose frequency components are continuously mapped.
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7. A transmission method comprising:
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mapping frequency components of an analog signal at equally spaced discrete locations within a transmission frequency band; time-division multiplexing the analog signal and a preamble signal to generate a transmission signal, the preamble signal being a digital signal whose frequency components are continuously mapped over the transmission frequency band; and transmitting the transmission signal, the transmission signal having an autocorrelation value to be used for timing synchronization at a reception apparatus that receives the transmission signal.
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8. A reception method comprising:
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receiving a signal that is generated at a communication partner apparatus by time-division multiplexing an analog signal and a preamble signal, the analog signal having its frequency components mapped at equally spaced discrete locations within a transmission frequency band, the preamble signal being a digital signal having its frequency components continuously mapped over the transmission frequency band; achieving timing synchronization using an autocorrelation value of the received signal; demultiplexing the received signal into the analog signal and the preamble signal based on a result of the timing synchronization; estimating a channel response by using the preamble signal; mapping the frequency components of the analog signal at continuous locations over the transmission band; and performing frequency-domain equalization by using the estimated channel response on the analog signal whose frequency components are continuously mapped.
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Specification