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公开(公告)号：US06937641B2
公开(公告)日：2005-08-30
申请号：US10083687
申请日：2002-02-27
摘要： A novel power-controlled random-access method allows a mobile station to gain fast access to the base station. At the mobile station, a composite power control command is devised after an initial access attempt. The determination of the composite command uses an open-loop power-control symbol and a closed-loop power-control symbol, to decide the action of the mobile station upon transmission of its next random-access signal. In the preferred embodiment, the composite power control command can specify different levels of increase or decrease in transmission power, and the composite power control command can specify a back-off by the mobile station. This composite power-control mechanism can help resolve collision between mobile stations accessing the same random access sub-channel and therefore maintain a low-delay in the random-access process and a high-utilization on the access-channel resource.
摘要翻译： 一种新颖的功率控制随机接入方法允许移动台获得对基站的快速接入。 在移动站，在初始接入尝试之后设计复合功率控制命令。 复合命令的确定使用开环功率控制符号和闭环功率控制符号来决定移动台在其下一个随机接入信号的传输时的动作。 在优选实施例中，复合功率控制命令可以指定不同的发送功率的增加或减少的水平，并且复合功率控制命令可以指定移动台的退避。 该复合功率控制机制可以帮助解决接入相同随机接入子信道的移动台之间的冲突，从而在随机接入过程中保持低延迟，并且在接入信道资源上保持高的利用率。
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2.发明授权公开(公告)号：US06843597B1
公开(公告)日：2005-01-18
申请号：US09854620
申请日：2001-05-15
CPC分类号： H04L27/3809 , H03G3/3052 , H04B1/7117 , H04L2027/0067
摘要： In a burst-mode, high-speed spread-spectrum communications system, faster convergence of a receiver's automatic gain control (AGC) circuit reduces the time required to bring a received signal within the operating range of an operation amplifier and other radio-frequency and digital sections of the receiving system. A gain control circuit includes a coarse-gain feedback loop and a fine-gain feedback loop to improve convergence speed and at the same time maintain the stability of the AGC circuit. The coarse-gain feedback loop quickly brings the received signal, using a large gain signal, to the desired operating range. The fine-gain feedback loop uses a smaller gain signal to gradually smooth the received signal to avoid saturation on the A/D converters.
摘要翻译： 在突发模式下，高速扩频通信系统，接收机的自动增益控制（AGC）电路的更快的收敛减少了将接收信号带到运算放大器和其他射频的工作范围内所需的时间， 接收系统的数字部分。 增益控制电路包括粗增益反馈回路和精细增益反馈回路，以提高收敛速度，同时保持AGC电路的稳定性。 粗增益反馈环路将接收到的信号快速地使用大增益信号传送到所需的工作范围。 微增益反馈环路使用较小的增益信号来逐渐平滑接收信号，以避免A / D转换器饱和。
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公开(公告)号：US06993065B2
公开(公告)日：2006-01-31
申请号：US09970888
申请日：2001-10-05
IPC分类号： H04B1/707
CPC分类号： H04B7/2628 , H04B1/7105 , H04J13/004
摘要： A multi-channel spread-spectrum system separates a data stream, for example from a convolutional encoder and an interleaver, into sub-channel data-sequence signals. For each sub-channel data-sequence signal, m bits are translated to one code of a unique set of orthogonal chip-sequence signals. The other k bits of the same sub-channel data-sequence signal are translated to a distinct phasor. Each phasor is used to modulate the respective chip-sequence signal. A complex-signal combiner combines the real and imaginary components of all the phase-modulated chip-sequence signals into in-phase (I) and quadrature (Q) spread-spectrum multi-channel signals, which are spread by a cell-site specific signature-sequence. The receiver decorrelates the received spread-spectrum signal, preferably with a bank of matched filter (MF) joint-detectors, to recover the bits from all the spread-spectrum sub-channel signals for remultiplexing into the transmitted data stream. The multi-channel spread-spectrum system supports constant data rate throughout the cell by maintaining a large processing gain, at the demultiplexed sub-channel data sequence level, thus a code-reuse-one type spread-spectrum system can be deployed with the aid of power control.
摘要翻译： 多通道扩频系统将例如从卷积编码器和交织器的数据流分离成子信道数据序列信号。 对于每个子信道数据序列信号，将m位转换为唯一的一组正交码片序列信号的一个码。 相同子信道数据序列信号的其他k位被转换为独立的相量。 每个相量用于调制相应的码片序列信号。 复信号组合器将所有相位调制芯片序列信号的实部和虚部组合到同相（I）和正交（Q）扩频多通道信号中，这些信号由小区站点特定 签名序列。 接收机将所接收的扩频信号优选地与一组匹配滤波器（MF）联合检测器去相关，以从所有扩频子信道信号中恢复比特，以便再次复用到所发送的数据流中。 多通道扩频系统通过在解复用的子信道数据序列级别保持大的处理增益来支持整个小区的恒定数据速率，从而可以借助于部署代码重用一类型扩频系统 的电源控制。
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公开(公告)号：US06714586B2
公开(公告)日：2004-03-30
申请号：US09852085
申请日：2001-05-10
IPC分类号： H04B1707
CPC分类号： H04B1/70751 , H04B1/70752 , H04B1/70775 , H04B1/7093 , H04B1/7095
摘要： Multi-path effects are common in mobile communications. When coupled with spread-spectrum signals utilizing spreading code sequences, detection of more than one multi-path signal becomes a necessity in order to output a clean signal with little loss. In accord with the invention, a spread-spectrum sliding matched-filter searcher system comprises a partial matched-filter that receives the input spread-spectrum signal. The searcher matches samples of the input signal with a tap length m of the reference code and produces a first correlation value. The first correlation value is compared to a first threshold. When it equals or exceeds the first threshold, the first correlation value is integrated to produce a second correlation value. This second value is compared with a second threshold, which if met signifies the detection of the multi-path signal. The process is repeated until all significant multi-path signals are detected. This design of the present invention is flexible in nature because the searcher can be programmed to act like a matched-filter, a correlator, or a combination of both while significantly improving the search time and reducing the amount of hardware and complexity characteristic of a matched-filter.
摘要翻译： 多路径效应在移动通信中很常见。 当与利用扩展码序列的扩展频谱信号相结合时，为了输出几乎没有损失的干净信号，检测多于一个多路径信号是必要的。 根据本发明，扩频滑动匹配滤波器搜索器系统包括接收输入扩频信号的部分匹配滤波器。 搜索者使用参考码的抽头长度m匹配输入信号的样本，并产生第一相关值。 将第一相关值与第一阈值进行比较。 当其等于或超过第一阈值时，第一相关值被积分以产生第二相关值。 将该第二值与第二阈值进行比较，如果满足表示多路径信号的检测。 重复该过程，直到检测到所有有效的多路径信号。 本发明的这种设计本质上是灵活的，因为搜索器可被编程为像匹配滤波器，相关器或两者的组合一样起作用，同时显着地改善搜索时间并减少硬件的数量和匹配的复杂度特性 -过滤。
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公开(公告)号：US20050254467A1
公开(公告)日：2005-11-17
申请号：US11186777
申请日：2005-07-22
摘要： A novel power-controlled random-access method allows a mobile station to gain fast access to the base station. At the mobile station, a composite power control command is devised after an initial access attempt. The determination of the composite command uses an open-loop power-control symbol and a closed-loop power-control symbol, to decide the action of the mobile station upon transmission of its next random-access signal. In the preferred embodiment, the composite power control command can specify different levels of increase or decrease in transmission power, and the composite power control command can specify a back-off by the mobile station. This composite power-control mechanism can help resolve collision between mobile stations accessing the same random access sub-channel and therefore maintain a low-delay in the random-access process and a high-utilization on the access-channel resource.
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公开(公告)号：US06842480B1
公开(公告)日：2005-01-11
申请号：US09662148
申请日：2000-09-14
CPC分类号： H04B1/7093
摘要： A programmable matched filter bank comprises a sliding integrator and compensation calculation circuits. The integrator receives a chip stream of samples derived from a received spread-spectrum signal and integrates a number of the most recent samples, to form a common integration value. Each of the compensation calculation circuits receives the same most recent samples and receives a respective one of the possible reference spreading code sequences. In operation, each compensation calculation circuit derives a compensation value, and an associated circuit modifies the common integration value by the respective compensation value. The result is a value of correlation between the predetermined number of most recent samples, for each respective reference code sequence. The inventive approach reduces the number of bit adders and inverters in the implementation of a matched-filter, a programmable matched filter and a programmable matched filter bank for spread spectrum receivers.
摘要翻译： 可编程匹配滤波器组包括滑动积分器和补偿计算电路。 积分器接收从接收到的扩频信号导出的码片的码流，并且对多个最近的采样进行积分，以形成公共的积分值。 每个补偿计算电路接收相同的最近的采样并且接收可能的参考扩展码序列中的相应的一个。 在操作中，每个补偿计算电路得到补偿值，并且相关联的电路通过相应的补偿值修改公共积分值。 结果是对于每个相应的参考代码序列，预定数量的最近的采样之间的相关值。 本发明的方法减少了匹配滤波器，可编程匹配滤波器和可扩展频谱接收机的可编程匹配滤波器组的实现中的加法器和反相器的数量。
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公开(公告)号：US06324210B1
公开(公告)日：2001-11-27
申请号：US09668743
申请日：2000-09-25
IPC分类号： H04B1707
CPC分类号： H04B1/70751 , H04B1/70752 , H04B1/70775 , H04B1/7093 , H04B1/7095
摘要： Multi-path effects are common in mobile communications. When coupled with spread-spectrum signals utilizing spreading code sequences, detection of more than one multi-path signal becomes a necessity in order to output a clean signal with little loss. In accord with the invention, a spread-spectrum sliding matched-filter searcher system comprises a partial matched-filter that receives the input spread-spectrum signal. The searcher matches samples of the input signal with a tap length m of the reference code and produces a first correlation value. The first correlation value is compared to a first threshold. When it equals or exceeds the first threshold, the first correlation value is integrated to produce a second correlation value. This second value is compared with a second threshold, which if met signifies the detection of the multi-path signal. The process is repeated until all significant multi-path signals are detected. This design of the present invention is flexible in nature because the searcher can be programmed to act like a matched-filter, a correlator, or a combination of both while significantly improving the search time and reducing the amount of hardware and complexity characteristic of a matched-filter.
摘要翻译： 多路径效应在移动通信中很常见。 当与利用扩展码序列的扩展频谱信号相结合时，为了输出几乎没有损失的干净信号，检测多于一个多路径信号是必要的。 根据本发明，扩频滑动匹配滤波器搜索器系统包括接收输入扩频信号的部分匹配滤波器。 搜索者使用参考码的抽头长度m匹配输入信号的样本，并产生第一相关值。 将第一相关值与第一阈值进行比较。 当其等于或超过第一阈值时，第一相关值被积分以产生第二相关值。 将该第二值与第二阈值进行比较，如果满足表示多路径信号的检测。 重复该过程，直到检测到所有有效的多路径信号。 本发明的这种设计本质上是灵活的，因为搜索器可被编程为像匹配滤波器，相关器或两者的组合一样起作用，同时显着地改善搜索时间并减少硬件的数量和匹配的复杂度特性 -过滤。
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公开(公告)号：US06324209B1
公开(公告)日：2001-11-27
申请号：US09570393
申请日：2000-05-12
IPC分类号： H04K100
CPC分类号： H04B7/2628 , H04B1/7105 , H04J13/004
摘要： A multi-channel spread-spectrum system separates a data stream, for example from a convolutional encoder and an interleaver, into sub-channel data-sequence signals. For each sub-channel data-sequence signal, m bits are translated to one code of a unique set of orthogonal chip-sequence signals. The other k bits of the same sub-channel data-sequence signal are translated to a distinct phasor. Each phasor is used to modulate the respective chip-sequence signal. A complex-signal combiner combines the real and imaginary components of all the phase-modulated chip-sequence signals into in-phase (I) and quadrature (Q) spread-spectrum multi-channel signals, which are spread by a cell-site specific signature-sequence. The receiver decorrelates the received spread-spectrum signal, preferably with a bank of matched filter (MF) joint-detectors, to recover the bits from all the spread-spectrum sub-channel signals for remultiplexing into the transmitted data stream. The multi-channel spread-spectrum system supports constant data rate throughout the cell by maintaining a large processing gain, at the demultiplexed sub-channel data sequency level, thus a code-reuse-one type spread-spectrum system can be deployed with the aid of power control.
摘要翻译： 多通道扩频系统将例如从卷积编码器和交织器的数据流分离成子信道数据序列信号。 对于每个子信道数据序列信号，将m位转换为唯一的一组正交码片序列信号的一个码。 相同子信道数据序列信号的其他k位被转换为独立的相量。 每个相量用于调制相应的码片序列信号。 复信号组合器将所有相位调制芯片序列信号的实部和虚部组合到同相（I）和正交（Q）扩频多通道信号中，这些信号由小区站点特定 签名序列。 接收机将所接收的扩频信号优选地与一组匹配滤波器（MF）联合检测器去相关，以从所有扩频子信道信号中恢复比特，以便再次复用到所发送的数据流中。 多通道扩频系统通过在解复用的子信道数据顺序级别保持大的处理增益来支持整个小区的恒定数据速率，从而可以借助于部署代码重用一类型扩频系统 的电源控制。
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公开(公告)号：US09115042B2
公开(公告)日：2015-08-25
申请号：US14344582
申请日：2012-09-11
申请人： Gang Yang , Lei Xu , Huie Yang , En Jiang , Jianping Fan , Xintang Zhao , Changhua Zeng , Wenqing Zhang , Yunlong Lei , Zhong Li , Shukang Chen
发明人： Gang Yang , Lei Xu , Huie Yang , En Jiang , Jianping Fan , Xintang Zhao , Changhua Zeng , Wenqing Zhang , Yunlong Lei , Zhong Li , Shukang Chen
IPC分类号： C07C17/20 , B01J27/132 , B01J23/00 , B01J23/26 , B01J37/00
CPC分类号： C07C17/206 , B01J23/002 , B01J23/26 , B01J27/132 , B01J37/0018 , B01J2523/00 , C07C21/18 , B01J2523/31 , B01J2523/3712 , B01J2523/67 , B01J2523/3706 , B01J2523/3718 , B01J2523/27 , B01J2523/22
摘要： Provided are a fluorination catalyst for preparing 2,3,3,3-tetrafluoropropene and a method using the catalyst for preparing 2,3,3,3-tetrafluoropropene. The catalyst has the following structural formula: Crx(Y,Z)0.005-0.5O0.1-1.0F1.0-3.0, where Y is one or a combination of two or more among Al, Zn, and Mg, and where Z is a rare earth element having an oxygen-storing/releasing function. The catalyst has in preparing 2,3,3,3-tetrafluoropropene the advantages of increased raw material conversion rate, great product selectivity, and extended catalyst service life.
摘要翻译： 提供了用于制备2,3,3,3-四氟丙烯的氟化催化剂和使用该制备2,3,3,3-四氟丙烯的催化剂的方法。 催化剂具有以下结构式：Crx（Y，Z）0.005-0.5O0.1-1.0F1.0-3.0，其中Y是Al，Zn和Mg中的一种或两种或更多种的组合，其中Z 是具有氧气储存/释放功能的稀土元素。 催化剂在制备2,3,3,3-四氟丙烯方面具有原料转化率提高，产品选择性好，催化剂使用寿命延长的优点。
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公开(公告)号：US20140350312A1
公开(公告)日：2014-11-27
申请号：US14344582
申请日：2012-09-11
申请人： Gang Yang , Lei Xu , Huie Yang , En Jiang , Jianping Fan , Xintang Zhao , Changhua Zeng , Wenqing Zhang , Yunlong Lei , Zhong Li , Shukang Chen
发明人： Gang Yang , Lei Xu , Huie Yang , En Jiang , Jianping Fan , Xintang Zhao , Changhua Zeng , Wenqing Zhang , Yunlong Lei , Zhong Li , Shukang Chen
IPC分类号： C07C17/20 , B01J27/132
CPC分类号： C07C17/206 , B01J23/002 , B01J23/26 , B01J27/132 , B01J37/0018 , B01J2523/00 , C07C21/18 , B01J2523/31 , B01J2523/3712 , B01J2523/67 , B01J2523/3706 , B01J2523/3718 , B01J2523/27 , B01J2523/22
摘要： Provided are a fluorination catalyst for preparing 2,3,3,3-tetrafluoropropene and a method using the catalyst for preparing 2,3,3,3-tetrafluoropropene. The catalyst has the following structural formula: Crx(Y,Z)0.005-0.5O0.1-10F1.0-3.0, where Y is one or a combination of two or more among Al, Zn, and Mg, and where Z is a rare earth element having an oxygen-storing/releasing function. The catalyst has in preparing 2,3,3,3-tetrafluoropropene the advantages of increased raw material conversion rate, great product selectivity, and extended catalyst service life.
摘要翻译： 提供了用于制备2,3,3,3-四氟丙烯的氟化催化剂和使用该制备2,3,3,3-四氟丙烯的催化剂的方法。 催化剂具有以下结构式：Crx（Y，Z）0.005-0.5O0.1-10F1.0-3.0，其中Y是Al，Zn和Mg中的一种或两种或更多种的组合，其中Z是 具有氧气储存/释放功能的稀土元素。 催化剂在制备2,3,3,3-四氟丙烯方面具有原料转化率提高，产品选择性好，催化剂使用寿命延长的优点。
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