OFDM transmitting and receiving apparatus

Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...

Reexamination Certificate

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Details

C370S208000, C370S436000, C370S478000

Reexamination Certificate

active

10252443

ABSTRACT:
An OFDM transmitting and receiving apparatus where the receiving unit receives an OFDM signal. A computing unit in the receiving unit computes a value of a channel response characteristic of each transmission channel corresponding to subcarriers contained in the received OFDM signal, and obtains a computed value. A comparing unit compares the computed value with a predetermined threshold value, and computes a ratio of the number of the subcarriers including the value of the channel response characteristic higher than the predetermined threshold value, to the number of all the subcarriers, and obtaining a computed ratio. A setting unit sets a transmission condition based on at least the computed ratio. A transmitting unit transmits an OFDM signal based on the transmission condition set.

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