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公开(公告)号：US20130279548A1
公开(公告)日：2013-10-24
申请号：US13452743
申请日：2012-04-20
CPC分类号： H04L27/2078 , H04L25/03834 , H04L27/227
摘要： A variation on conventional DPSK binary modulation schemes is provided. One modulation scheme uses 3π/8 differential binary phase shift keying (3π/8-DBPSK) where one symbol is transmitted by phase change of 3π/8 radians and the other symbol is transmitted by phase change of −5π/8 radians. Alternatively, this can be thought of as adding a constant 3π/8 radians to the symbol angle for every bit modulated by conventional DBPSK. In another example, assume a first and second symbols, k−1 and k, respectively, are sent. Where k is the same symbol as k−1, a phase rotation of 3π/8 radians from the kth symbol is used to represent the symbol at k−1; and where the k−1 symbol is the opposite of the kth symbol, its rotation 11π/8 radians from the kth symbol. Other modulation schemes using other phase rotations can be provided.
摘要翻译： 提供了常规DPSK二进制调制方案的变体。 一个调制方案使用3pi / 8差分二进制相移键控（3pi / 8-DBPSK），其中一个符号通过3pi / 8弧度的相位变化传输，另一个符号通过-5pi / 8弧度的相位变化传输。 或者，这可以被认为是对于由常规DBPSK调制的每个位的符号角添加常量3pi / 8弧度。 在另一示例中，假设分别发送第一和第二符号k-1和k。 其中k是与k-1相同的符号，使用从第k个符号的3pi / 8弧度的相位旋转来表示k-1处的符号; 并且其中k-1符号与第k个符号相反，其旋转11pi / 8从第k个符号弧度。 可以提供使用其他相位旋转的其他调制方案。
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公开(公告)号：US07822163B2
公开(公告)日：2010-10-26
申请号：US11621706
申请日：2007-01-10
申请人： Abu S. Amanullah
发明人： Abu S. Amanullah
IPC分类号： H04L7/00
CPC分类号： H04J3/0608
摘要： A technique for synchronizing a device for communication is based on an accumulated sum of values or absolute values. The absolute value can be of either the sum or difference of a plurality of symbols. In one embodiment, the absolute values of the sum or difference of three symbol pairs are accumulated, and the accumulated total compared to a threshold value to determine whether the symbols are at the end of a predetermined sequence of symbols. When the comparison to the threshold value is positive, the three symbol pairs are the last six symbols in the predetermined sequence. In practice, the invention can be implemented in a number of different environments including, for example, in a WiMedia MBOA network environment. In the WiMedia MBOA environment, the predetermined sequence can comprise the preamble of a WiMedia MBOA packet.
摘要翻译： 用于同步用于通信的设备的技术基于值的累加和或绝对值。 绝对值可以是多个符号的和或差。 在一个实施例中，三个符号对的和或差的绝对值被累加，并且累积总和与阈值相比较，以确定符号是否处于预定符号序列的结尾。 当与阈值的比较为正时，三个符号对是预定序列中的最后六个符号。 实际上，本发明可以在许多不同的环境中实现，例如在WiMedia MBOA网络环境中。 在WiMedia MBOA环境中，预定的序列可以包括WiMedia MBOA分组的前同步码。
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公开(公告)号：US20080165909A1
公开(公告)日：2008-07-10
申请号：US11621706
申请日：2007-01-10
申请人： Abu S. Amanullah
发明人： Abu S. Amanullah
IPC分类号： H04L7/00
CPC分类号： H04J3/0608
摘要： A technique for synchronizing a device for communication is based on an accumulated sum of values or absolute values. The absolute value can be of either the sum or difference of a plurality of symbols. In one embodiment, the absolute values of the sum or difference of three symbol pairs are accumulated, and the accumulated total compared to a threshold value to determine whether the symbols are at the end of a predetermined sequence of symbols. When the comparison to the threshold value is positive, the three symbol pairs are the last six symbols in the predetermined sequence. In practice, the invention can be implemented in a number of different environments including, for example, in a WiMedia MBOA network environment. In the WiMedia MBOA environment, the predetermined sequence can comprise the preamble of a WiMedia MBOA packet.
摘要翻译： 用于同步用于通信的设备的技术基于值的累加和或绝对值。 绝对值可以是多个符号的和或差。 在一个实施例中，三个符号对的和或差的绝对值被累加，并且累积总和与阈值相比较，以确定符号是否处于预定符号序列的结尾。 当与阈值的比较为正时，三个符号对是预定序列中的最后六个符号。 实际上，本发明可以在许多不同的环境中实现，例如在WiMedia MBOA网络环境中。 在WiMedia MBOA环境中，预定的序列可以包括WiMedia MBOA分组的前同步码。
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