Transmission device and transmission method

Details Transmission device and transmission method Transmission device and transmission method

2004-02-05

2009-10-06

Ngo, Ricky (Department: 2416)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

C370S334000, C370S517000

Reexamination Certificate

active

07599401

ABSTRACT:
A GI insertion section105inserts a guard interval into transmission data. Delay addition sections107-1, 107-2set a delay time in the transmission data. An arrival time calculation section115calculates for each directivity an arrival time after data is transmitted from the other party of communication until the data is received from received data of each directivity. A delay time determining section116calculates a difference in the arrival time between transmission data transmitted with two directivities and sets the calculated arrival time difference in the transmission data to be transmitted with the directivity corresponding to the smaller arrival time as a delay time. A GI length determining section117sets a minimum arrival time of the calculated arrival times as a guard interval. This allows a transmission rate to be improved by shortening the length of a guard interval in a radio communication system to which a system of transmitting an OFDM signal with a directivity is applied.

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