RECOGNITION RADIO SYSTEM CAPABLE OF USING A FORWARD ERROR CORRECTION METHOD AND A DATA TRANSMISSION METHOD OF THE RECOGNITION RADIO SYSTEM

摘要

PURPOSE: A recognition radio system and a data transmission method of the recognition radio system are provided to transmit and receive the data to a main user terminal without damage even when assistant user terminals using an OFDM(Orthogonal Frequency Division Multiplexing) sense different available frequency bands.;CONSTITUTION: The recognition radio system(10) comprises a first assistant user terminal(100) and a second assistant user terminal(200). The first assistant user terminal transmits data to the second assistant user terminal by using a frequency band of a main user terminal. The second assistant user terminal receives the data from the first assistant user terminal by using the frequency band of the main user terminal. The first assistant user terminal comprises a radio communication unit, an encoding unit, and a controller. The radio communication unit senses a spectrum of the frequency band of the main user terminal. The encoding unit converts the data which are going to be transmitted into code words including a plurality of symbols by using a forward error correction method. A controller divides the spectrum sensed by controlling the radio communication unit into a plurality of subcarrier and transmits each symbol to the second assistant user terminal through the divided subcarrier.;COPYRIGHT KIPO 2013;[Reference numerals] (100) First assistant user terminal; (200) Second assistant user terminal; (AA) Data transmission; (BB) CR system;