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    • 1. 发明公开
    • Windowing and frequency-domain equalisation in multicarrier receivers
    • Fensterung und Entzerrung im Frequenzbereich inMehrträgerempfängern
    • EP1081907A1
    • 2001-03-07
    • EP00302440.3
    • 2000-03-24
    • NEC USA, Inc.
    • Nedic, SlobodanPopovic, Nenad
    • H04L27/26H04L25/03
    • H04L25/03159H04L2025/03414H04L2025/03522
    • An apparatus for receiving a discrete multi-tone (DMT) signal representative of a series of input symbols and including a plurality of orthogonal sinusoidal subchannels of finite length for each input symbol, the apparatus including a plurality of delay circuits (102), each operable to receive the DMT signal and produce a delayed DMT signal; a plurality of windowing circuits (104), each operable to receive a respective one of the delayed DMT signals and produce a windowed DMT signal; at least one finite duration fast Fourier transform (FFT) circuit (106), operable to receive the windowed DMT signals and produce respective complex signals representing a plurality of bins corresponding to the subchannels of the DMT signal; a plurality of multiplier circuits (108) each operable to produce a product of (i) a complex factor for compensating for a respective phase shift introduced by a corresponding one of the delay circuits, and (ii) a respective one of the complex signals; an equalizer circuit (110) operable to receive the products from the plurality of multiplier circuits and produce a partial response signaling (PRS) coded signal; and a PRS decoder (112) operable to receive the PRS coded signal and produce output symbols representative of the input symbols.
    • 一种用于接收表示一系列输入符号并包括每个输入符号的有限长度的多个正交正弦子信道的离散多音(DMT)信号的装置,所述装置包括多个延迟电路(102),每个可延迟电路 以接收DMT信号并产生延迟的DMT信号; 多个开窗电路(104),每个开窗电路(104)可操作以接收延迟的DMT信号中的相应一个并产生加窗的DMT信号; 至少一个有限持续时间的快速傅立叶变换(FFT)电路(106),可操作以接收加窗的DMT信号并产生表示对应于DMT信号的子信道的多个存储区的相应复数信号; 多个乘法器电路(108),每个乘法器电路(108)可操作以产生(i)用于补偿由对应的一个延迟电路引入的相应相移的复数因子和(ii)复信号中的相应一个的乘积; 均衡器电路(110),可操作以从多个乘法电路接收产品并产生部分响应信令(PRS)编码信号; 以及PRS解码器(112),其可操作以接收PRS编码信号并产生表示输入符号的输出符号。