Patent ID: 11876737
Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A transmission apparatus for an Orthogonal Frequency Division Multiplexing (OFDM)-based broadcasting system, comprising:
multiple transmission frame generation units for generating multiple transmission frames from multiple pieces of transmission data;
an extended frame combination unit for generating an extended frame by combining the multiple transmission frames so that the multiple transmission frames are adjacent to each other based on a frequency;
an extended OFDM modulation unit for modulating the extended frame and then generating a modulated signal; and
a frequency up-conversion unit for performing frequency up-conversion on the modulated signal and then generating a transmission signal,
wherein each of the transmission frame generation units comprises:
a data input unit for receiving a corresponding one of the multiple pieces of transmission data;
a channel-encoding unit for encoding the received transmission data and then generating encoded data; and
a framing and interleaving unit for framing and interleaving the encoded data and then generating a transmission frame, and

wherein the multiple transmission frame generation units comprise:
an existing channel transmission frame generation unit for generating an existing channel transmission frame;
a high channel transmission frame generation unit for generating a high channel transmission frame; and
a low channel transmission frame generation unit for generating a low channel transmission frame to be paired with the high channel transmission frame, and

wherein the extended OFDM modulation unit adds subcarriers of the modulated signal to a guard band of the existing channel transmission frame.