-
公开(公告)号：US20070263667A1
公开(公告)日：2007-11-15
申请号：US11878283
申请日：2007-07-23
IPC分类号： H04B3/10
CPC分类号： H04L5/0048 , H04L5/0007 , H04L25/0226 , H04L25/0228 , H04L27/2613 , H04L27/2655 , H04L27/364 , H04L27/3863 , H04L2027/0016
摘要： A transmitter (102) generates a first set of data symbols and a first pilot symbol (601) at a first time, and a second set of data symbols and a second pilot symbol (602) at a different, second time. The first (601) and second (602) pilot. symbols are each represented by first (701) and second (702) pilot carriers, respectively, located at first (703) and second (704) predetermined sample frequencies, respectively, in a channel bandwidth. For the first pilot symbol (601), the first (701) and second (702) pilot carriers have first and second predetermined values, respectively. For the second pilot symbol (602), the first (701) and second (702) pilot carriers have third and fourth predetermined values, respectively. A receiver (104) measures the first, second, fourth and third predetermined values responsive to receiving the first (601) and second (602) pilot symbols to determine first, second, third and fourth estimates of channel distortion, respectively, for compensating and recovering the first and the second sets of data symbols.
摘要翻译： 发射机（102）在不同的第二时间产生第一组数据符号和第一导频符号（601），第二组数据符号和第二导频符号（602）。 第一（601）和第二（602）飞行员。 符号分别由分别位于信道带宽中的第一（703）和第（704）个预定采样频率的第一（701）和第二（702）导频载波表示。 对于第一导频符号（601），第一（701）和第二（702）导频载波分别具有第一和第二预定值。 对于第二导频符号（602），第一（701）和第二（702）导频载波分别具有第三和第四预定值。 接收器（104）响应于接收到第一（601）和第二（602）导频符号来测量第一，第二，第四和第三预定值，以分别确定信道失真的第一，第二，第三和第四估计，用于补偿和 恢复第一和第二组数据符号。
-
2.发明授权Method and system for detecting and classifying the modulation of unknown analog and digital telecommunications signals 失效用于检测和分类未知模拟和数字电信信号调制的方法和系统公开(公告)号：US07428270B1
公开(公告)日：2008-09-23
申请号：US09504676
申请日：2000-02-15
申请人： Christian Dubuc , Daniel Boudreau
发明人： Christian Dubuc , Daniel Boudreau
CPC分类号： G01R29/06 , H04L27/0012
摘要： Disclosed is a unique system and method for recognizing the type of modulation embedded in an unknown complex baseband signal, comprising a receiver section for extracting the complex baseband signal from a modulated signal having a carrier frequency, and comprising an orderly series of signal processing functions for (a) estimating the bandwidth of the unknown signal, (b) removing the out-of-band noise and correcting gross carrier frequency errors, (c) discriminating between constant envelope and irregular envelope signals, (d) estimating and correcting residual carrier frequency errors, (e) classifying a constant envelope signal into one of the following modulation formats: {Continuous Wave (CW), Frequency Modulation (FM), Frequency Shift Keying (FSK)}, and (f) classifying an irregular envelope signal into one of the following modulation formats: {Amplitude Modulation (AM), Double Sideband Suppressed Carrier (DSB-SC), Binary Shift Keying (BPSK), Quaternary Phase Shift Keying (QPSK), π/4-shifted QPSK, M-ary PSK (MPSK), and OTHER classes}.
摘要翻译： 公开了一种用于识别嵌入在未知复基带信号中的调制类型的独特系统和方法，包括：用于从具有载波频率的调制信号中提取复基带信号的接收机部分，并且包括有序的一系列信号处理功能， （a）估计未知信号的带宽，（b）去除带外噪声和校正总载波频率误差，（c）区分恒定包络和不规则包络信号，（d）估计和校正残余载波频率 误差，（e）将恒定包络信号分类成以下调制格式之一：{连续波（CW），调频（FM），频移键控（FSK）}）和（f）将不规则包络信号分类成一个 以下调制格式：调幅调幅（AM），双边带抑制载波（DSB-SC），二进制移位键控（BPSK），第四相移键控（QPSK） pi / 4位移QPSK，M-ary PSK（MPSK）和OTHER类}。
-
公开(公告)号：US07869538B2
公开(公告)日：2011-01-11
申请号：US11878283
申请日：2007-07-23
IPC分类号： H04L27/00
CPC分类号： H04L5/0048 , H04L5/0007 , H04L25/0226 , H04L25/0228 , H04L27/2613 , H04L27/2655 , H04L27/364 , H04L27/3863 , H04L2027/0016
摘要： A transmitter (102) generates a first set of data symbols and a first pilot symbol (601) at a first time, and a second set of data symbols and a second pilot symbol (602) at a different, second time. The first (601) and second (602) pilot. symbols are each represented by first (701) and second (702) pilot carriers, respectively, located at first (703) and second (704) predetermined sample frequencies, respectively, in a channel bandwidth. For the first pilot symbol (601), the first (701) and second (702) pilot carriers have first and second predetermined values, respectively. For the second pilot symbol (602), the first (701) and second (702) pilot carriers have third and fourth predetermined values, respectively. A receiver (104) measures the first, second, fourth and third predetermined values responsive to receiving the first (601) and second (602) pilot symbols to determine first, second, third and fourth estimates of channel distortion, respectively, for compensating and recovering the first and the second sets of data symbols.
摘要翻译： 发射机（102）在不同的第二时间产生第一组数据符号和第一导频符号（601），第二组数据符号和第二导频符号（602）。 第一（601）和第二（602）飞行员。 符号分别由分别位于信道带宽中的第一（703）和第（704）个预定采样频率的第一（701）和第二（702）导频载波表示。 对于第一导频符号（601），第一（701）和第二（702）导频载波分别具有第一和第二预定值。 对于第二导频符号（602），第一（701）和第二（702）导频载波分别具有第三和第四预定值。 接收器（104）响应于接收到第一（601）和第二（602）导频符号来测量第一，第二，第四和第三预定值，以分别确定信道失真的第一，第二，第三和第四估计，用于补偿和 恢复第一和第二组数据符号。
-
公开(公告)号：US08213543B2
公开(公告)日：2012-07-03
申请号：US12776757
申请日：2010-05-10
CPC分类号： H04L5/0048 , H04L5/0007 , H04L25/0226 , H04L25/0228 , H04L27/2613 , H04L27/2655 , H04L27/364 , H04L27/3863 , H04L2027/0016
摘要： A transmitter (102) generates a first set of data symbols and a first pilot symbol (601) at a first time, and a second set of data symbols and a second pilot symbol (602) at a different, second time. The first (601) and second (602) pilot symbols are each represented by first (701) and second (702) pilot carriers, respectively, located at first (703) and second (704) predetermined sample frequencies, respectively, in a channel bandwidth. For the first pilot symbol (601), the first (701) and second (702) pilot carriers have first and second predetermined values, respectively. For the second pilot symbol (602), the first (701) and second (702) pilot carriers have third and fourth predetermined values, respectively. A receiver (104) measures the first, second, fourth and third predetermined values responsive to receiving the first (601) and second (602) pilot symbols to determine first, second, third and fourth estimates of channel distortion, respectively, for compensating and recovering the first and the second sets of data symbols.
摘要翻译： 发射机（102）在不同的第二时间产生第一组数据符号和第一导频符号（601），第二组数据符号和第二导频符号（602）。 第一（601）和第二（602）导频符号分别由分别位于信道中的第一（703）和第二（704）预定采样频率的第一（701）和第二（702）导频载波， 带宽。 对于第一导频符号（601），第一（701）和第二（702）导频载波分别具有第一和第二预定值。 对于第二导频符号（602），第一（701）和第二（702）导频载波分别具有第三和第四预定值。 接收器（104）响应于接收到第一（601）和第二（602）导频符号来测量第一，第二，第四和第三预定值，以分别确定信道失真的第一，第二，第三和第四估计，用于补偿和 恢复第一和第二组数据符号。
-
公开(公告)号：US07251291B1
公开(公告)日：2007-07-31
申请号：US10321699
申请日：2002-12-18
CPC分类号： H04L5/0048 , H04L5/0007 , H04L25/0226 , H04L25/0228 , H04L27/2613 , H04L27/2655 , H04L27/364 , H04L27/3863 , H04L2027/0016
摘要： A transmitter (102) generates a first set of data symbols and a first pilot symbol (601) at a first time, and a second set of data symbols and a second pilot symbol (602) at a different, second time. The first (601) and second (602) pilot symbols are each represented by first (701) and second (702) pilot carriers, respectively, located at first (703) and second (704) predetermined sample frequencies, respectively, in a channel bandwidth. For the first pilot symbol (601), the first (701) and second (702) pilot carriers have first and second predetermined values, respectively. For the second pilot symbol (602), the first (701) and second (702) pilot carriers have third and fourth predetermined values, respectively. A receiver (104) measures the first, second, fourth and third predetermined values responsive to receiving the first (601) and second (602) pilot symbols to determine first, second, third and fourth estimates of channel distortion, respectively, for compensating and recovering the first and the second sets of data symbols.
摘要翻译： 发射机（102）在不同的第二时间产生第一组数据符号和第一导频符号（601），第二组数据符号和第二导频符号（602）。 第一（601）和第二（602）导频符号分别由分别位于信道中的第一（703）和第二（704）预定采样频率的第一（701）和第二（702）导频载波， 带宽。 对于第一导频符号（601），第一（701）和第二（702）导频载波分别具有第一和第二预定值。 对于第二导频符号（602），第一（701）和第二（702）导频载波分别具有第三和第四预定值。 接收器（104）响应于接收到第一（601）和第二（602）导频符号来测量第一，第二，第四和第三预定值，以分别确定信道失真的第一，第二，第三和第四估计，用于补偿和 恢复第一和第二组数据符号。
-
公开(公告)号：US07486735B2
公开(公告)日：2009-02-03
申请号：US10787700
申请日：2004-02-26
申请人： Christian Dubuc , Colin Brown , Daniel Boudreau
发明人： Christian Dubuc , Colin Brown , Daniel Boudreau
CPC分类号： H04L27/2608
摘要： The present invention divides the available sub-carriers in an OFDM symbol window into N groups of sub-carriers wherein each group will be associated with sub-bands. In one embodiment, the sub-carriers in a group are spread throughout the range of sub-carriers to improve frequency diversity, and the sub-carriers assigned to any one group are separated by a constant offset. The sub-carriers in the group may be offset by an integer power of two. Within each group, sub-bands are defined using frequency hopping patterns among sub-carriers in the group from one OFDM symbol window to another. A pseudo-random pattern may be employed for sub-carrier mapping from one OFDM symbol window to the next to effectively distribute the sub-bands across the selected band of sub-carriers for the group.
摘要翻译： 本发明将OFDM符号窗口中的可用子载波划分为N组子载波，其中每个组将与子带相关联。 在一个实施例中，组中的子载波在整个子载波范围内扩展以改善频率分集，并且分配给任何一个组的副载波被分离一个恒定的偏移量。 组中的子载波可以被两个整数倍的偏移量。 在每个组内，使用从一个OFDM符号窗口到另一个OFDM符号窗口的组中的子载波之间的跳频模式来定义子带。 可以采用伪随机模式用于从一个OFDM符号窗口到下一个OFDM符号窗口的子载波映射，以有效地分布跨所选择的子载波频带的子带。
-
公开(公告)号：US07356089B2
公开(公告)日：2008-04-08
申请号：US10655012
申请日：2003-09-05
申请人： Ming Jia , Peiying Zhu , Wen Tong , Christian Dubuc
发明人： Ming Jia , Peiying Zhu , Wen Tong , Christian Dubuc
CPC分类号： H04B7/0417 , H04B7/0682 , H04B7/10 , H04L1/0025 , H04L1/0612 , H04L1/0625 , H04L1/0656 , H04L25/0206 , H04L27/2602
摘要： A rotation by a phase offset is applied to symbols to be transmitted by one antenna relative to symbols to be transmitted from another antenna in a wireless communication system employing multi-element antennas at the transmitter. Such a phase offset allows the functionality of a MIMO system to be maintained when a MIMO channel degenerates. Advantageously, a MIMO system using the new signal design may provide a level of performance in a rich-scattering environment that is equivalent to a MIMO system using a known signal design. Furthermore, a MIMO system employing embodiments of the present invention may show significantly improvements in robustness over conventional MIMO systems.
摘要翻译： 通过相位偏移的旋转被应用于将由一个天线相对于在发射机处采用多元天线的无线通信系统中的另一个天线发送的符号要发送的符号。 当MIMO信道退化时，这种相位偏移允许维持MIMO系统的功能。 有利地，使用新信号设计的MIMO系统可以在丰富散射环境中提供等效于使用已知信号设计的MIMO系统的性能水平。 此外，采用本发明的实施例的MIMO系统可以显示出超常的MIMO系统的鲁棒性的显着改进。
-
公开(公告)号：US07388847B2
公开(公告)日：2008-06-17
申请号：US10678631
申请日：2003-10-03
IPC分类号： H04Q7/00
CPC分类号： H04L1/0071 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/0061 , H04L1/0618 , H04L1/20 , H04L27/2601 , H04W72/1231 , H04W72/1284
摘要： The present invention provides an improved channel quality indicator indicia for OFDM communication environments. In addition to taking into consideration carrier-to-interference ratios, the present invention also takes into consideration the degree to which the channel response varies among the sub-carriers throughout the OFDM frequency band. The carrier-to-interference ratio and the degree of channel response variation are directly or indirectly used by a base station to select coding and modulation schemes for transmissions from the base station to the mobile terminal reporting these factors. Further, scheduling of data sent to the mobile terminal and other mobile terminals competing for the same channel resources may also be based in part on the carrier-to-interference ratio and the degree to which the channel response varies.
摘要翻译： 本发明提供了用于OFDM通信环境的改进的信道质量指示符标记。 除了考虑载波干扰比之外，本发明还考虑了整个OFDM频带中的子载波之间信道响应变化的程度。 载波干扰比和信道响应变化程度由基站直接或间接地用于选择用于从基站到移动终端的报告这些因素的传输的编码和调制方案。 此外，发送到移动终端和竞争相同信道资源的其他移动终端的数据的调度也可以部分地基于载波干扰比和信道响应变化的程度。
-
公开(公告)号：US20050053169A1
公开(公告)日：2005-03-10
申请号：US10655012
申请日：2003-09-05
申请人： Ming Jia , Peiying Zhu , Wen Tong , Christian Dubuc
发明人： Ming Jia , Peiying Zhu , Wen Tong , Christian Dubuc
CPC分类号： H04B7/0417 , H04B7/0682 , H04B7/10 , H04L1/0025 , H04L1/0612 , H04L1/0625 , H04L1/0656 , H04L25/0206 , H04L27/2602
摘要： A rotation by a phase offset is applied to symbols to be transmitted by one antenna relative to symbols to be transmitted from another antenna in a wireless communication system employing multi-element antennas at the transmitter. Such a phase offset allows the functionality of a MIMO system to be maintained when a MIMO channel degenerates. Advantageously, a MIMO system using the new signal design may provide a level of performance in a rich-scattering environment that is equivalent to a MIMO system using a known signal design. Furthermore, a MIMO system employing embodiments of the present invention may show significantly improvements in robustness over conventional MIMO systems.
摘要翻译： 通过相位偏移的旋转被应用于将由一个天线相对于在发射机处采用多元天线的无线通信系统中的另一个天线发送的符号要发送的符号。 当MIMO信道退化时，这种相位偏移允许维持MIMO系统的功能。 有利地，使用新信号设计的MIMO系统可以在丰富散射环境中提供等效于使用已知信号设计的MIMO系统的性能水平。 此外，采用本发明的实施例的MIMO系统可以显示出超常的MIMO系统的鲁棒性的显着改进。
-
公开(公告)号：US20050041622A1
公开(公告)日：2005-02-24
申请号：US10678631
申请日：2003-10-03
申请人： Christian Dubuc , Jason Duggan , Peiying Zhu
发明人： Christian Dubuc , Jason Duggan , Peiying Zhu
IPC分类号： H04L1/00 , H04L1/06 , H04L1/20 , H04L12/56 , H04L27/26 , H04W16/14 , H04W24/08 , H04W28/22 , H04W72/12 , H04Q7/00
CPC分类号： H04L1/0071 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/0061 , H04L1/0618 , H04L1/20 , H04L27/2601 , H04W72/1231 , H04W72/1284
摘要： The present invention provides an improved channel quality indicator indicia for OFDM communication environments. In addition to taking into consideration carrier-to-interference ratios, the present invention also takes into consideration the degree to which the channel response varies among the sub-carriers throughout the OFDM frequency band. The carrier-to-interference ratio and the degree of channel response variation are directly or indirectly used by a base station to select coding and modulation schemes for transmissions from the base station to the mobile terminal reporting these factors. Further, scheduling of data sent to the mobile terminal and other mobile terminals competing for the same channel resources may also be based in part on the carrier-to-interference ratio and the degree to which the channel response varies.
摘要翻译： 本发明提供了用于OFDM通信环境的改进的信道质量指示符标记。 除了考虑载波干扰比之外，本发明还考虑了整个OFDM频带中的子载波之间信道响应变化的程度。 载波干扰比和信道响应变化程度由基站直接或间接地用于选择用于从基站到移动终端的报告这些因素的传输的编码和调制方案。 此外，发送到移动终端和竞争相同信道资源的其他移动终端的数据的调度也可以部分地基于载波干扰比和信道响应变化的程度。
-
-
-
-
-
-
-
-
-
搜索结果
12 条记录 (耗时 0.02 秒)
