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특허 검색
구분 출원국
출원년도 ~ 키워드

상세정보

등록 비정방 직교진폭변조에서 연판정 복조 방법

비정방 직교진폭변조에서 연판정 복조 방법
이미지 확대
발명자
정준영, 이제원, 최동준, 허남호
출원번호
15151768 (2016.05.11)
공개번호
20160337081 (2016.11.17)
등록번호
9832065 (2017.11.28)
출원국
미국
협약과제
14MR3500, FTN(Faster Than Nyquist)기반 유무선 방송시스템 고도화 기술 개발, 허남호
초록
Disclosed are an apparatus and a method for soft-decision demodulating in non-square quadrature amplitude modulation. The apparatus includes: a signal receiving unit receiving a quadrature amplitude modulation (QAM) modulated signal at an m modulation degree at a transmitting side; a soft-decision bit calculating unit determining a soft-decision bit value by calculating log likelihood ratios (LLRs) for m bits of the received QAM modulated signal; and a signal decoding unit restoring the received QAM modulated signal based on the determined soft-decision bit value, in which the soft-decision bit calculating unit defines a log likelihood ratio calculation equation by approximating soft-decision boundary points of constellation points for m bits of non-square QAM having odd bits, respectively.
KSP 제안 키워드
Amplitude Modulation, Boundary points, Likelihood Ratio, Log-likelihood, Modulated signals, Quadrature-amplitude modulation(QAM), Signal decoding, Soft-decision, decision boundary, log likelihood ratio(LLR), signal based
패밀리
 
패밀리 특허 목록
구분 특허 출원국 KIPRIS
등록 비정방 직교진폭변조 방식의 연판정 복조 장치 및 방법 대한민국