Communication system and device under OFDM system

Details Communication system and device under OFDM system Communication system and device under OFDM system

2006-08-08

2006-08-08

Vu, Huy D. (Department: 2616)

Multiplex communications

Diagnostic testing

Determination of communication parameters

C370S344000, C370S468000, C455S067110, C455S068000, C455S045000

Reexamination Certificate

active

07088683

ABSTRACT:
Communication between a stationary terminal such as an on-road terminal and a mobile terminal mounted on an automotive vehicle is performed under an OFDM system. Before transmitting data signals from the mobile terminal to the stationary terminal, a control signal indicating the number of sub-carries used in the data transmission is sent to the stationary terminal. The number of sub-carriers is decreased in accordance with increase of the moving speed to avoid deterioration in communication quality due to the moving speed increase. A modification formula and/or an error-correction-code coding rate used in the data transmission may be varied according to the moving speed in place of or together with varying the number of sub-carriers.

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