OFDM communication apparatus and OFDM communication method

Details OFDM communication apparatus and OFDM communication method OFDM communication apparatus and OFDM communication method

2007-02-13

2007-02-13

Lee, Andrew C. (Department: 2616)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

C370S252000

Reexamination Certificate

active

10182104

ABSTRACT:
An OFDM communication apparatus and OFDM communication method that both improve information signal transmission efficiency and improve demodulated signal error rate characteristics in an OFDM method to which multicasting is applied. An OFDM communication apparatus according to the present invention comprises a receiving section that receives an OFDM signal transmitted to a plurality of OFDM communication apparatuses, a detecting section that detects whether or not there is an error in a received OFDM signal, a generating section that generates a retransmission request OFDM signal by superimposing a retransmission request signal on a previously specified subcarrier when there is an error in a received OFDM signal, and a transmitting section that transmits a generated retransmission request OFDM signal at previously set timing common to all the above-mentioned plurality of OFDM communication apparatuses.

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