직교부호와 비이진 신호값을 이요한 코드분할다중접속/직교주파수분할다중 방식의 송/수신 장치 및 방법
공형윤, 송석일, 오현서
- 7215635 (2007.05.08)
- An apparatus for transmitting and receiving a signal in Code Division Multiple Access/Orthogonal Frequency Division Multiplexing (CDMA/OFDM) system is provided. The apparatus discriminates user signals with a unique spreading code and the orthogonal codes, increases data transmission rate with the non-binary value without increasing of entire bandwidth used by the users, solves signal interference with interleaver and diversity effect of interleaving and OFDM, and maximizes transmission efficiency by varying modulation schemes depending on channel states.
- KSP 제안 키워드
- Code division Multiple Access(CDMA), Data transmission, Data transmission rate, Frequency division, Frequency division multiplexing, Modulation scheme, Orthogonal code, Orthogonal frequency division Multiplexing(OFDM), Transmission Rate, binary value, division multiplexing, multiple access, non-binary, signal interference, spreading code, transmission efficiency