Gap filler apparatus and method for providing cyclic delay...

Details Gap filler apparatus and method for providing cyclic delay... Gap filler apparatus and method for providing cyclic delay...

2005-12-02

2010-10-12

Moe, Aung S (Department: 2474)

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

C370S203000, C370S208000, C370S310000, C370S312000, C370S343000

Reexamination Certificate

active

07813330

ABSTRACT:
A gap filler apparatus providing cyclic delay diversity in a digital multimedia broadcasting (DMB) system. In the gap filler apparatus, a receiver receives an orthogonal frequency division multiplexing (OFDM) signal transmitted as a broadcasting signal. A symbol synchronization unit acquires symbol synchronization of the OFDM signal, detects a guard interval of an OFDM symbol using the symbol synchronization, determines a sample length, by which the OFDM symbol is cyclic-delayed within the guard interval, and cyclic-delays the OFDM signal by the determined sample length. An amplifier amplifies the cyclic-delayed OFDM signal. A transmitter transmits the amplified OFDM signal to a wireless network.

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