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公开(公告)号：US07231583B2
公开(公告)日：2007-06-12
申请号：US10470417
申请日：2002-01-30
申请人： Paul Febvre , Panagiotis Fines
发明人： Paul Febvre , Panagiotis Fines
IPC分类号： H03M13/00
CPC分类号： H04L1/005 , H04J3/0602 , H04J3/0605 , H04L1/0041 , H04L1/0066 , H04L1/0068 , H04L1/0072 , H04L7/0008 , H04L7/048
摘要： In a frame sync method, a receiver searches for the presence of an N-symbol long unique word pattern. For each possible frame sync detected, the receiver proceeds to demodulation and FEC processing. After each iteration of the FEC decoder, the detected unique word pattern is compared to the expected one and the frame sync is detected if the number of unique word errors has decreased.
摘要翻译： 在帧同步方法中，接收机搜索N符号长独特字模式的存在。 对于检测到的每个可能的帧同步，接收机进行解调和FEC处理。 在FEC解码器的每次迭代之后，将检测到的唯一字模式与期望的唯一字模式进行比较，并且如果唯一字错误的数量已经减少，则检测到帧同步。
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公开(公告)号：US5974094A
公开(公告)日：1999-10-26
申请号：US930699
申请日：1997-12-17
申请人： Panagiotis Fines , Siu Wah Wong
发明人： Panagiotis Fines , Siu Wah Wong
IPC分类号： H04L27/14 , H04L27/144
CPC分类号： H04L27/144
摘要： Data is transmitted in a signal comprising a data signal D.sub.m at a frequency within a range B of discrete frequency tones D.sub.0 to D.sub.m-1 representing a predetermined range of digital values, and a pilot signal (36, 37). The signal is received by a circuit comprising a transformer (44 to 54) which transforms the received signal into a set of frequency samples of the pilot signal and a set of frequency samples of the data signal. The samples are input to a correlator (58) which correlates the set of frequency samples of the pilot signal with the set of frequency samples of the data signal at each of the discrete frequency tones in order to identify the discrete frequency tone to which the frequency of the data signal corresponds. In this way, the digital value represented by the data signal can be identified. The circuit is suitable for use in a radio pager for receiving data signal transmissions from a distant source which may be transmitted from a satellite.
摘要翻译： PCT No.PCT / GB96 / 00891 Sec。 371 1997年12月17日第 102（e）日期1997年12月17日PCT 1996年4月11日PCT PCT。 出版物WO96 / 32797 日期1996年10月17日数据以包含表示数字值的预定范围的离散频率音调D0至Dm-1的范围B内的频率的数据信号Dm和导频信号（36,37）发送。 该信号由包括变换器（44至54）的电路接收，该变换器将接收的信号转换成导频信号的一组频率样本和数据信号的一组频率采样。 样本被输入到相关器（58），其将导频信号的频率样本集与在每个离散频率音调处的数据信号的频率样本集合相关联，以便识别频率的离散频率 的数据信号对应。 以这种方式，可以识别由数据信号表示的数字值。 该电路适用于无线电寻呼机，用于接收可能从卫星发射的远距离信号源的数据信号传输。
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公开(公告)号：US07187903B1
公开(公告)日：2007-03-06
申请号：US09439348
申请日：1999-11-15
IPC分类号： H04B7/19
CPC分类号： H04W56/0045 , H04B7/2125 , H04B7/2643 , H04J3/0682 , H04W56/0085
摘要： In a wireless communications system, transceivers transmit short bursts to a base station, which determines timing corrections from the time of receipt of the burst and transmits the timing corrections to the respective transceivers. In one aspect, the base station indicates to the transceivers a plurality of time slots, each transceiver selects one of the time slots at random, formats a burst including an indicator of the selected time slot and transmits the burst in that slot. In another aspect, the base station transmits to each transceiver a timing uncertainty value, which determines how the timing correction will be modified by the tranceiver as the interval since last receiving a timing correction increases. Data bursts are transmitted in a format comprising a first unique word, a content field and a second unique word, in that order. The bursts are transmitted in a TDMA channel format which can accommodate both short and long bursts in a block format of constant periodicity.
摘要翻译： 在无线通信系统中，收发信机向基站发送短脉冲串，从基站接收时间确定定时校正，并将时序校正发送到相应的收发器。 在一个方面，基站向收发机指示多个时隙，每个收发机随机选择一个时隙，格式化包括所选时隙的指示符的突发，并在该时隙中发送突发。 在另一方面，基站向每个收发信机发送定时不确定性值，该定时不确定性值确定由于自上次接收定时校正之后的间隔增加时，引导器如何修改定时校正。 按照该顺序以包括第一唯一字，内容字段和第二唯一字的格式发送数据突发。 脉冲串以TDMA信道格式传输，其可以以恒定周期性的块格式容纳短和长突发。
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公开(公告)号：US20060023717A1
公开(公告)日：2006-02-02
申请号：US10501736
申请日：2003-01-20
IPC分类号： H04L12/56
CPC分类号： H04L1/0039 , H04L1/0009 , H04L1/0066 , H04L1/0075 , H04L1/0083 , H04L2001/0098 , H04W28/18 , H04W48/08
摘要： A wireless communication system uses an adaptive air interface in which burst parameters are variable on a burst-by-burst basis, based on the reception quality of previous bursts and/or properties of the receiver or receivers of the burst. The parameter values are selected as sets which represent only some of the possible combinations of parameter values, to avoid redundancy in performance characteristics. Coding rates are selected to give a substantially constant increment in gain. Each burst may contain multiple FEC blocks with different coding rates. A unique word indicates the FEC coding rate of the first block and the first block identifies the coding rate of each of the subsequent blocks.
摘要翻译： 无线通信系统使用自适应空中接口，其中基于突发的接收机或接收机的先前突发的接收质量和/或属性，突发参数在逐个突发的基础上是可变的。 选择参数值作为仅表示参数值的一些可能组合的集合，以避免性能特征中的冗余。 选择编码速率以提供基本上恒定的增益增量。 每个突发可以包含具有不同编码速率的多个FEC块。 唯一的字表示第一块的FEC编码率，第一块标识每个后续块的编码率。
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公开(公告)号：US20120051273A1
公开(公告)日：2012-03-01
申请号：US13140797
申请日：2009-10-05
IPC分类号： H04B7/00
CPC分类号： H04L1/0045
摘要： A wireless multiple access method allows multiple transmitters to access the same channels so that substantial interference occurs. The transmitters use low rate turbo coding and the receiver uses multi-user detection to separate and decode the transmissions. Different propagation and/or transmission characteristics between the transmitters help to distinguish the transmissions at the receiver. The transmitters may add random variation to their transmission timing, power and/or frequency to assist with decoding.
摘要翻译： 无线多址方法允许多个发射机访问相同的信道，从而发生实质的干扰。 发射机使用低速率turbo编码，并且接收机使用多用户检测来分离和解码传输。 发射机之间的不同传播和/或传输特性有助于区分接收机的传输。 这些发射机可以对它们的发射定时，功率和/或频率增加随机变化以辅助解码。
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公开(公告)号：US08078934B2
公开(公告)日：2011-12-13
申请号：US11743438
申请日：2007-05-02
申请人： Paul R. Febvre , Panagiotis Fines
发明人： Paul R. Febvre , Panagiotis Fines
IPC分类号： H03M13/00
CPC分类号： H04L1/005 , H04J3/0602 , H04J3/0605 , H04L1/0041 , H04L1/0066 , H04L1/0068 , H04L1/0072 , H04L7/0008 , H04L7/048
摘要： In a frame sync method, a receiver searches for the presence of an N-symbol long unique word pattern. For each possible frame sync detected, the receiver proceeds to demodulation and FEC processing. After each iteration of the FEC decoder, the detected unique word pattern is compared to the expected one and the frame sync is detected if the number of unique word errors has decreased.
摘要翻译： 在帧同步方法中，接收机搜索N符号长独特字模式的存在。 对于检测到的每个可能的帧同步，接收机进行解调和FEC处理。 在FEC解码器的每次迭代之后，将检测到的唯一字模式与期望的唯一字模式进行比较，并且如果唯一字错误的数量已经减少，则检测到帧同步。
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公开(公告)号：US07532891B2
公开(公告)日：2009-05-12
申请号：US10798550
申请日：2004-03-12
IPC分类号： H04W72/00
CPC分类号： H04W56/0045 , H04B7/2125 , H04B7/2643 , H04J3/0682 , H04W56/0085
摘要： In a wireless communications system, transceivers transmit short bursts to a base station, which determines timing corrections from the time of receipt of the burst and transmits the timing corrections to the respective transceivers. In one aspect, the base station indicates to the transceivers a plurality of time slots, each transceiver selects one of the time slots at random, formats a burst including an indicator of the selected time slot and transmits the burst in that slot. In another aspect, the base station transmits to each transceiver a timing uncertainty value, which determines how the timing correction will be modified by the tranceiver as the interval since last receiving a timing correction increases. Data bursts are transmitted in a format comprising a first unique word, a content field and a second unique word, in that order. The bursts are transmitted in a TDMA channel format which can accommodate both short and long bursts in a block format of constant periodicity.
摘要翻译： 在无线通信系统中，收发信机向基站发送短脉冲串，从基站接收时间确定定时校正，并将时序校正发送到相应的收发器。 在一个方面，基站向收发机指示多个时隙，每个收发机随机选择一个时隙，格式化包括所选时隙的指示符的突发，并在该时隙中发送突发。 在另一方面，基站向每个收发信机发送定时不确定性值，该定时不确定性值确定由于自上次接收定时校正之后的间隔增加时，引导器如何修改定时校正。 按照该顺序以包括第一唯一字，内容字段和第二唯一字的格式发送数据突发。 脉冲串以TDMA信道格式传输，其可以以恒定周期性的块格式容纳短和长突发。
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公开(公告)号：US20080134009A1
公开(公告)日：2008-06-05
申请号：US11743438
申请日：2007-05-02
申请人： Paul Febvre , Panagiotis Fines
发明人： Paul Febvre , Panagiotis Fines
CPC分类号： H04L1/005 , H04J3/0602 , H04J3/0605 , H04L1/0041 , H04L1/0066 , H04L1/0068 , H04L1/0072 , H04L7/0008 , H04L7/048
摘要： In a frame sync method, a receiver searches for the presence of an N-symbol long unique word pattern. For each possible frame sync detected, the receiver proceeds to demodulation and FEC processing. After each iteration of the FEC decoder, the detected unique word pattern is compared to the expected one and the frame sync is detected if the number of unique word errors has decreased.
摘要翻译： 在帧同步方法中，接收机搜索N符号长独特字模式的存在。 对于检测到的每个可能的帧同步，接收机进行解调和FEC处理。 在FEC解码器的每次迭代之后，将检测到的唯一字模式与期望的唯一字模式进行比较，并且如果唯一字错误的数量已经减少，则检测到帧同步。
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