Transmitting apparatus and transmitting method

Details Transmitting apparatus and transmitting method Transmitting apparatus and transmitting method

2003-11-13

2010-06-29

Nguyen, Hanh (Department: 2473)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Particular set of orthogonal functions

Reexamination Certificate

active

07746762

ABSTRACT:
A control section101outputs retransmission information as to whether or not a transmit signal is a retransmission signal, and if a retransmission signal, which (first, second, etc.) retransmission this is, to a selection section107. An IFFT section103performs orthogonal frequency division multiplexing processing of the transmit signal. A GI insertion section104inserts a guard interval in the transmit signal. A GI insertion section105inserts in the transmit signal a guard interval longer than the guard interval inserted by GI insertion section104. A GI insertion section106inserts in the transmit signal a guard interval longer than the guard intervals inserted by GI insertion section104and GI insertion section105. Based on the retransmission information input from control section101, selection section107selects a transmit signal in which a longer guard interval has been inserted as the number of retransmissions increases. By this means it is possible to prevent an increase in transmission delay due to an excessive increase in the number of retransmissions with almost no lowering of transmission efficiency.

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