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    Frame synchronization and detection technique for a digital receiver
    6.
    发明授权
    Frame synchronization and detection technique for a digital receiver 有权
    数字接收机的帧同步和检测技术

    公开(公告)号：US06850582B2

    公开(公告)日：2005-02-01

    申请号：US10392115

    申请日：2003-03-17

    申请人： Deirdre O'Shea ,  Ismail Lakkis ,  Saeid Safavi ,  Masood K. Tayebi ,  Baya Hatim ,  Cathal O'Scolai

    发明人： Deirdre O'Shea ,  Ismail Lakkis ,  Saeid Safavi ,  Masood K. Tayebi ,  Baya Hatim ,  Cathal O'Scolai

    IPC分类号： H04J13/00 ,  H04W84/14 ,  H04L7/00

    CPC分类号： H04W84/14

    摘要： 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.

    摘要翻译： 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。

    Frame synchronization and detection technique for a digital receiver
    7.
    发明授权
    Frame synchronization and detection technique for a digital receiver 失效
    用于数字发射机的组合器电路和方法

    公开(公告)号：US06563856B1

    公开(公告)日：2003-05-13

    申请号：US09111812

    申请日：1998-07-08

    申请人： Deirdre O'Shea ,  Ismail Lakkis ,  Saeid Safavi ,  Masood K. Tayebi ,  Baya Hatim ,  Cathal O'Scolai

    发明人： Deirdre O'Shea ,  Ismail Lakkis ,  Saeid Safavi ,  Masood K. Tayebi ,  Baya Hatim ,  Cathal O'Scolai

    IPC分类号： H04B169

    CPC分类号： H04W84/14

    摘要： A combiner circuit and method for use in a digital transmitter within a communication system. The combiner circuit receives a number of signal streams that include data frames. Each frame includes an arbitrary data sequence and portions of a unique word. The combiner circuit comprises a plurality of digital preamble circuits which append a predetermined number of contiguous bits from the unique word to each data frame. The system utilizes a plurality of spreaders, shifters, and a summer to further modify the data stream for transmission.

    摘要翻译： 一种用于通信系统内的数字发射机的组合器电路和方法。 组合电路接收包括数据帧的多个信号流。 每帧包括任意数据序列和唯一字的部分。 组合器电路包括多个数字前置电路，其将来自唯一字的预定数量的连续位附加到每个数据帧。 该系统利用多个扩展器，移位器和加法器来进一步修改数据流以进行传输。

    Wireless multimedia carrier system
    8.
    发明授权
    Wireless multimedia carrier system 失效
    无线多媒体载体系统

    公开(公告)号：US06373827B1

    公开(公告)日：2002-04-16

    申请号：US08954217

    申请日：1997-10-20

    申请人： Masood K. Tayebi ,  Baya Hatim ,  Saeid Safavi ,  Chi Nche ,  Ismail Lakkis ,  Cathal O'Scolai ,  Deirdre O'Shea ,  Joseph J. Roy ,  Ulun Karacaoglu ,  Hoang Xuan Bui

    发明人： Masood K. Tayebi ,  Baya Hatim ,  Saeid Safavi ,  Chi Nche ,  Ismail Lakkis ,  Cathal O'Scolai ,  Deirdre O'Shea ,  Joseph J. Roy ,  Ulun Karacaoglu ,  Hoang Xuan Bui

    IPC分类号： H04B700

    CPC分类号： H04W84/14

    摘要： A system and method for communication of radio frequency (RF) signals over multimedia signal paths. The invention provides a wireless multimedia carrier (WMC) system capable of receiving a variety of standardized input signals, such as DS0/E0, T1/E1, T2/E2, and/or T3/E3 for transmission using RF channels. The WMC system selectively employs time division multiple access (TDMA) and/or code division multiple access (CDMA) technology. The WMC system transmits the various signal inputs using RF carriers, receives the transmitted signals, and converts the signals to the desired signaling scheme (standard) for forwarding to intended destinations.

    摘要翻译： 一种用于在多媒体信号路径上通信射频（RF）信号的系统和方法。 本发明提供一种无线多媒体载体（WMC）系统，其能够接收各种标准化的输入信号，例如用于使用RF信道传输的诸如DS0 / E0，T1 / E1，T2 / E2和/或T3 / E3。 WMC系统选择性地采用时分多址（TDMA）和/或码分多址（CDMA）技术。 WMC系统使用RF载波传输各种信号输入，接收发送的信号，并将信号转换为所需的信令方案（标准），以转发到预期的目的地。