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    • 1. 发明授权
    • Pseudo-random sequence padding in an OFDM modulation system
    • OFDM调制系统中的伪随机序列填充
    • US07072289B1
    • 2006-07-04
    • US09872059
    • 2001-06-01
    • Lin YangKe GongZhi-Xing Yang
    • Lin YangKe GongZhi-Xing Yang
    • H04J11/00
    • H04L27/2605H04J13/0022H04L27/2613
    • A method of estimating timing of at least one of the beginning and the end of a transmitted signal segment in the presence of time delay in a signal transmission channel. Each of a sequence of signal frames is provided with a pseudo-noise (PN) m-sequences, where the PN sequences satisfy selected orthogonality and closures relations. A convolution signal is formed between a received signal and the sequence of PN segments and is subtracted from the received signal to identify the beginning and/or end of a PN segment within the received signal. PN sequences are used for timing recovery, for carrier frequency recovery, for estimation of transmission channel characteristics, for synchronization of received signal frames, and as a replacement for guard intervals in an OFDM context.
    • 一种在信号传输通道中存在时间延迟的情况下估计发射信号段的开始和结束中的至少一个的定时的方法。 信号帧序列中的每一个被提供有伪噪声(PN)m序列,其中PN序列满足选择的正交性和闭合关系。 在接收信号和PN段序列之间形成卷积信号,并从接收信号中减去卷积信号,以识别接收信号内PN段的开始和/或结束。 PN序列用于定时恢复,用于载波频率恢复,用于传输信道特性的估计,用于接收信号帧的同步,以及作为OFDM上下文中的保护间隔的替代。