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    • 7. 发明授权
    • Frame synchronization and detection technique for a digital receiver
    • 数字接收机的帧同步和检测技术
    • US06850582B2
    • 2005-02-01
    • US10392115
    • 2003-03-17
    • Deirdre O'SheaIsmail LakkisSaeid SafaviMasood K. TayebiBaya HatimCathal O'Scolai
    • Deirdre O'SheaIsmail LakkisSaeid SafaviMasood K. TayebiBaya HatimCathal O'Scolai
    • H04J13/00H04W84/14H04L7/00
    • H04W84/14
    • A system and method of frame synchronization and detection for use in a digital receiver within a communication system. The digital radio communication system includes a receiver for receiving a signal stream that includes data frames. Each frame includes an arbitrary data sequence and a unique word. A predetermined number of contiguous bits from the unique word are appended to the beginning of each data frame to identify the start of the data frame. The communication system comprises a sampling circuit for sampling symbol levels, a filter to implement the cross correlation of the received signal with the stored unique word, a threshold detector circuit to detect when frame synchronization is achieved as well as additional circuitry to refine the estimate from the threshold detection circuit. The design utilizes coherent demodulation. However, the design is equally applicable to non-coherent demodulation. In one embodiment, the sampling rate is assumed to be two samples per symbol. However, the functionality of the proposed design is not limited to two samples per symbol.
    • 用于通信系统内的数字接收机中的帧同步和检测的系统和方法。 数字无线电通信系统包括用于接收包括数据帧的信号流的接收机。 每帧包括任意数据序列和唯一字。 来自唯一字的预定数量的连续位被附加到每个数据帧的开头,以标识数据帧的开始。 通信系统包括用于对符号电平进行采样的采样电路,用于实现接收信号与存储的唯一字的互相关的滤波器,用于检测何时实现帧同步的阈值检测器电路以及用于从 阈值检测电路。 该设计采用相干解调。 然而,该设计同样适用于非相干解调。 在一个实施例中,假设采样率是每个符号的两个样本。 然而,所提出的设计的功能不限于每个符号两个样本。