OFDM FREQUENCY DOMAIN PREAMBLE DETECTION APPARATUS AND METHOD IN OFDM COMMUNICATION SYSTEM

Disclosed are an apparatus and method for detecting a frequency domain preamble of an OFDM communication system. According to the present invention, the method for detecting a frequency domain preamble of an OFDM communication system comprises the steps of: obtaining an initial value by performing f...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	JIN EUN SOOK, KIM SEON HWAN, CHEON KYUNG YUL, KIM CHANG JOO
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	Disclosed are an apparatus and method for detecting a frequency domain preamble of an OFDM communication system. According to the present invention, the method for detecting a frequency domain preamble of an OFDM communication system comprises the steps of: obtaining an initial value by performing fast Fourier transform (FFT) in units of blocks; performing FFT in units of samples using the initial value; determining a power ratio between a valid subcarrier with a signal and an invalid subcarrier with no signal by using a result of the FFT performed in units of samples; and determining a threshold of the power ratio according to a power probability distribution map to detect a preamble in a frequency domain. OFDM 통신시스템의 주파수 도메인 프리앰블 검출 장치 및 방법이 개시된다. OFDM 통신시스템의 주파수 도메인 프리앰블 검출 방법은 블록 단위의 고속 푸리에 연산(FFT: Fast Fourier Transform)을 수행하여 초기값을 획득하는 단계; 상기 초기값을 이용하여 샘플 단위의 FFT를 수행하는 단계; 샘플 단위의 FFT를 수행한 결과를 이용하여 신호가 포함된 유효 서브 캐리어와 신호가 포함되지 않은 무효 서브 캐리어 간의 전력비를 결정하는 단계; 및 전력 확률 분포도에 따라 상기 전력비의 임계값을 결정하여 주파수 영역에서 프리앰블을 검출하는 단계를 포함할 수 있다.