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    • 65. 发明公开
    • OFDM 시스템에서의 선택적인 등화기 탭 초기화를 위한방법 및 장치
    • OFDM系统中选择性均衡器初始化的方法和装置
    • KR1020030025175A
    • 2003-03-28
    • KR1020020052698
    • 2002-09-03
    • 톰슨 라이센싱
    • 베로트세르코브스키,맥심,비.리트윈,루이스,로버트,쥬니어.
    • H04J11/00
    • H04L25/03038H04L2025/03414H04L2025/03477H04L2025/03611H04L2025/03656H04L2025/03681H04L2025/037H04L2025/03726H04L2025/0377
    • PURPOSE: A method and apparatus for selective equalizer tap initialization in an ofdm system are provided to reduce channel noise by re-initializing the equalizer and selectively blocking an initialization of the tap. CONSTITUTION: OFDM receiver(20) includes a sampler(24), an FFT processor(28), a training symbol extractor(32), an adaptive equalizer(36), and downstream processors(40). In general, OFDM receiver(20) is configured to receive OFDM transmissions and recover baseband data therefrom. An FFT processor(28) is coupled to sampler(24) to receive time-domain data therefrom. FFT processor(28) is configured generate frequency-domain representations or data from the time-domain data by performing FFT operations on blocks of the time-domain data. A training symbol extractor(32) is configured to extract training symbols from training sequences that have been included in the transmitted OFDM signals. A training sequence contains predetermined transmission values for all of the subcarriers of the OFDM carrier.
    • 目的:提供一种用于在系统中进行选择性均衡器抽头初始化的方法和装置,以通过重新初始化均衡器并选择性地阻塞抽头的初始化来减少信道噪声。 构成:OFDM接收器(20)包括采样器(24),FFT处理器(28),训练符号提取器(32),自适应均衡器(36)和下游处理器(40)。 通常,OFDM接收机(20)被配置为接收OFDM传输并从其恢复基带数据。 FFT处理器(28)耦合到采样器(24)以从其接收时域数据。 FFT处理器(28)被配置为通过对时域数据的块执行FFT操作来从时域数据生成频域表示或数据。 训练符号提取器(32)被配置为从已经包括在所发送的OFDM信号中的训练序列中提取训练符号。 训练序列包含OFDM载波的所有子载波的预定传输值。