OFDM receiving system
PURPOSE: An OFDM(Orthogonal Frequency Division Multiplexing) receiving system is provided to reduce a manufacturing cost by storing continuously received OFDM signals during a desired time without using a FIFO register. CONSTITUTION: An OFDM receiving system includes a symbol timing estimation block...
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| Format: | Patent |
| Sprache: | eng ; kor |
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| Zusammenfassung: | PURPOSE: An OFDM(Orthogonal Frequency Division Multiplexing) receiving system is provided to reduce a manufacturing cost by storing continuously received OFDM signals during a desired time without using a FIFO register. CONSTITUTION: An OFDM receiving system includes a symbol timing estimation block(66), an approximate frequency estimation block(64), a fine frequency estimation block(68), and a plurality of memories(51-56). The symbol timing estimation block is used for estimating a starting point of a symbol of a received OFDM signal. The fine frequency estimation block is used for estimating an approximate frequency offset of the received OFDM signal. The fine frequency estimation block is used for estimating a fine frequency offset of the OFDM signal after correcting the approximate frequency offset of the OFDM signal. The plural memories are used for delaying OFDM signals while the symbol timing estimation block, the approximate frequency estimation block, and the fine frequency estimation block process the OFDM signal.
개시된 OFDM 수신시스템은, OFDM신호의 심볼의 시작시점을 추정하는 블록, OFDM신호의 개략적 주파수 옵셋을 추정하는 블록, OFDM신호의 미세 주파수옵셋을 추정하는 블록, 및 이들 블록이 OFDM신호를 처리하는 데 필요한 시간동안 수신된 OFDM신호를 각각 지연시키는 복수의 메모리를 가진다. 각 메모리의 용량은 각 블록들이 신호처리하는 데에 소요되는 시간동안 OFDM신호를 저장하기에 정확하게 필요한 크기를 갖는다. 따라서, OFDM신호를 신호처리동안 저장할 대용량의 메모리가 필요하지 않게 되므로 OFDM 수신시스템의 생산단가를 낮출 수 있다. |
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