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1.发明授权Method for transmitting signals in a digital communication system and transmitter for a digital communication system 有权用于在数字通信系统中传输信号的方法和用于数字通信系统的发射机公开(公告)号：US08391403B2
公开(公告)日：2013-03-05
申请号：US13371155
申请日：2012-02-10
IPC分类号： H04L27/00
CPC分类号： H04L1/1893 , H04L1/0003 , H04L27/02 , H04L27/18 , H04L27/34
摘要： A method is provided which improves reliability of channel estimation in a digital communication system by reducing the ambiguity in the recognition of received symbols evaluated for the channel estimation. A first plurality of bits is mapped to a modulation state according to a given Gray mapping of binary numbers to modulation states and transmitted. The plurality of bits is re-transmitted at least once, with a sub-set of bits contained in the plurality of bits inverted, and mapped to further modulation states according to the same Gray mapping. The bits to be inverted are determined in a way that the number of different vector sum results obtainable, for all combinations of bit values within the first plurality of bits, by adding vectors representing complex values of the first and further modulation states in a complex plane, is lower than the number of different modulation states within the Gray mapping.
摘要翻译： 提供了一种通过减少对为信道估计估计的接收符号的识别中的歧义来提高数字通信系统中的信道估计的可靠性的方法。 根据二进制数给出的调制状态的灰度映射将第一多个比特映射到调制状态并发送。 多个比特被重新发送至少一次，其中包含在多个比特中的比特位被反转，并且根据相同的灰色映射被映射到另外的调制状态。 通过将表示第一和另外的调制状态的复数值的向量加在复数平面中，以对于第一多个比特内的比特值的所有组合可获得的不同矢量和结果的数量的方式确定要反相的比特 ，低于Gray映射中不同调制状态的数量。
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公开(公告)号：US08160175B2
公开(公告)日：2012-04-17
申请号：US11817398
申请日：2005-03-29
IPC分类号： H04L27/00
CPC分类号： H04L25/0226
摘要： To improve the reliability of channel estimation, data symbols at determined positions of the transmitted data stream are replaced by quasi-pilot symbols. The quasi-pilot symbols carry data modulated onto the carrier with a different modulation scheme than the original symbols. The modulation scheme for the quasi-pilot symbols has a lower amplitude and/or phase ambiguity than the modulation scheme for the original data symbol.
摘要翻译： 为了提高信道估计的可靠性，将所发送的数据流的确定位置处的数据符号替换为准导频符号。 准导频符号使用与原始符号不同的调制方案将数据调制到载波上。 用于准导频符号的调制方案具有比原始数据符号的调制方案更低的幅度和/或相位模糊度。
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公开(公告)号：US20110206164A1
公开(公告)日：2011-08-25
申请号：US13036924
申请日：2011-02-28
IPC分类号： H03D1/24
CPC分类号： H04L27/34
摘要： The invention relates to methods for transmitting and receiving a data bit stream in a communication system using a 16-QAM constellation. Further, an apparatus for performing the methods is provided. To provide a modulation and coding scheme using a signal space expansion and 16-QAM which improves the bit-error rate in comparison to QPSK modulated signals and still provides the possibility to implement coders and decoders with low complexity the invention suggests the use a 16-QAM constellation with specially selected mapping rules together with repetition coding (signal space expansion) and interleaving of the data stream to be transmitted.
摘要翻译： 本发明涉及在使用16-QAM星座的通信系统中发送和接收数据比特流的方法。 此外，提供了一种用于执行该方法的装置。 为了提供使用信号空间扩展和16-QAM的调制和编码方案，其与QPSK调制信号相比提高了比特误码率，并且仍然提供实现低复杂度的编码器和解码器的可能性，本发明建议使用16- 具有特别选择的映射规则的QAM星座，以及要发送的数据流的重复编码（信号空间扩展）和交织。
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4.发明申请DATA TRANSMISSIONS IN A MOBILE COMMUNICATION SYSTEM EMPLOYING DIVERSITY AND CONSTELLATION REARRANGEMENT OF A 16 QAM SCHEME 有权移动通信系统中的数据传输采用16 QAM方案的多样性和协调排列公开(公告)号：US20090052576A1
公开(公告)日：2009-02-26
申请号：US11913475
申请日：2005-05-04
CPC分类号： H04L27/34 , H04L1/0045
摘要： The invention relates to methods for transmitting and receiving a data bit stream in a communication system using 16-QAM constellations. Further, an apparatus for performing the methods is provided. To improve the bit-error rate performance of the communication using the 16-QAM constellations the invention suggests the use 16-QAM constellations with specially selected mapping rules together with a special constellation rearrangement for creating different versions of the 16-QAM constellations. Further, the data stream is transmitted according to a diversity scheme employing different versions of the 16-QAM constellations obtained adhering the mapping rules and rearrangement rules defined by the invention.
摘要翻译： 本发明涉及在使用16-QAM星座的通信系统中发送和接收数据比特流的方法。 此外，提供了一种用于执行该方法的装置。 为了提高使用16-QAM星座的通信的误码率性能，本发明建议使用具有特别选择的映射规则的16-QAM星座以及用于创建不同版本的16-QAM星座的特殊星座重排。 此外，数据流是根据采用不同版本的16-QAM星座的分集方案进行传输的，这些版本遵循了本发明所定义的映射规则和重排规则。
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5.发明申请Method for Using a Symbol Mapper Using a Symbol Mapping Scheme to Generate Modulation Symbols According to a Different Symbol Mapping Scheme and a Method for Generating a Symbol Mapping Scheme 有权使用符号映射器使用符号映射方案根据不同符号映射方案生成调制符号的方法和生成符号映射方案的方法公开(公告)号：US20080267316A1
公开(公告)日：2008-10-30
申请号：US11993967
申请日：2005-06-29
CPC分类号： H04L27/34
摘要： The invention relates to method and apparatus for generating modulation symbols according to a second symbol mapping scheme by a symbol mapping unit being adapted to generate symbols according to a first symbol mapping scheme, wherein the first and second symbol mapping schemes define different mappings of data words of a stream to modulation symbols of a modulation scheme according to the respective symbol mapping scheme. Further, the invention relates to a method and apparatus for generating a mapping of data words to modulation symbols of a square 16 QAM constellation, the modulation symbols being representable by an inphase component and quadrature component. One aspect of the invention is the introduction of a bit sequence transformer unit transforming the data words to be mapped to modulation symbols prior to mapping thereby changing the Hamming distance properties of the mapping. Another aspect of the invention is the generation of a new AICO (Antipodal Inverted COnstellation) mapping scheme.
摘要翻译： 本发明涉及一种用于根据第二符号映射方案通过符号映射单元产生适应于根据第一符号映射方案生成符号的调制符号的方法和装置，其中第一和第二符号映射方案定义数据字的不同映射 根据相应的符号映射方案的调制方案的调制符号的流。 此外，本发明涉及一种用于产生数据字映射到方形16QAM星座的调制符号的方法和装置，调制符号可由同相分量和正交分量表示。 本发明的一个方面是引入一个比特序列变换器单元，在映射之前将要映射到数据字的映射到调制符号变换，从而改变映射的汉明距离属性。 本发明的另一个方面是生成新的AICO（Antipodal Inverted COnstellation）映射方案。
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公开(公告)号：US20080232510A1
公开(公告)日：2008-09-25
申请号：US11996964
申请日：2005-07-26
CPC分类号： H04L27/3405 , H04L1/02 , H04L1/18 , H04L25/067 , H04L27/38
摘要： Transmit diversity system in which constellation rearrangement is used. Both diversity signals contain the same data and both are 16-QAM, but the location of the data bits within the constellation is different. This averages the effect of the different levels of reliability of the different constellation points. A method for modifying a quadruple of data bits in a data transmission system using Quadrature. Amplitude Modulation with 16 different modulation states, 16-QAM, using an Antipodal Inverted Constellation AICO) mapping, swapping bits selecting contiguous symbol regions with bits selecting non-contiguous symbol regions. Depending on the particular pre-defined mapping and on the particular permutation of bits, inversion of selected bits may be performed in addition. The quadruples thus obtained are mapped to modulation symbols according to a pre-defined AICO mapping. In the corresponding method for receiving the symbols, likelihood values are swapped and modified in a way which is complementary to the permutation and inversion of bits, before they are combined with likelihood values from other symbols representing the same bits. Method ensures that there is a one to one correspondence between Hamming distance and Euclidian distance for the combined received data. In other words it ensures that, once combined, all 4 bit data words which differ by the same number of bits (Hamming distance) are the same distance apart in the constellation (Euclidian distance).
摘要翻译： 使用星座重排的发射分集系统。 两个分集信号都包含相同的数据，并且都是16-QAM，但星座内的数据位的位置是不同的。 这平均了不同星座点的不同可靠性水平的影响。 一种用于使用Quadrature修改数据传输系统中的四倍数据位的方法。 使用16个不同调制状态的幅度调制，16-QAM，使用Antipodal反向星座AICO）映射，交换选择具有选择不连续符号区域的位的连续符号区的位。 根据特定的预定义映射和位的特定置换，可以另外执行所选位的反转。 根据预定义的AICO映射将由此获得的四倍数映射到调制符号。 在用于接收符号的相应方法中，在将它们与表示相同比特的其他符号的似然值组合之前，以与位的置换和反相互补的方式交换和修改似然值。 方法确保了组合接收数据的汉明距离和欧氏距离之间有一对一的对应关系。 换句话说，它确保一旦组合，通过相同位数（汉明距离）不同的所有4位数据字在星座（欧几里得距离）中是相同的距离。
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公开(公告)号：US08160170B2
公开(公告)日：2012-04-17
申请号：US13036924
申请日：2011-02-28
CPC分类号： H04L27/34
摘要： The invention relates to methods for transmitting and receiving a data bit stream in a communication system using a 16-QAM constellation. Further, an apparatus for performing the methods is provided. To provide a modulation and coding scheme using a signal space expansion and 16-QAM which improves the bit-error rate in comparison to QPSK modulated signals and still provides the possibility to implement coders and decoders with low complexity the invention suggests the use a 16-QAM constellation with specially selected mapping rules together with repetition coding (signal space expansion) and interleaving of the data stream to be transmitted.
摘要翻译： 本发明涉及在使用16-QAM星座的通信系统中发送和接收数据比特流的方法。 此外，提供了一种用于执行该方法的装置。 为了提供使用信号空间扩展和16-QAM的调制和编码方案，其与QPSK调制信号相比提高了比特误码率，并且仍然提供实现低复杂度的编码器和解码器的可能性，本发明建议使用16- 具有特别选择的映射规则的QAM星座，以及要发送的数据流的重复编码（信号空间扩展）和交织。
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公开(公告)号：US08077789B2
公开(公告)日：2011-12-13
申请号：US11911155
申请日：2005-04-28
IPC分类号： H04L5/12
CPC分类号： H04L27/18 , H04L1/0003 , H04L1/0013 , H04L1/0071 , H04L1/08 , H04L27/34 , Y02D50/10
摘要： A method and apparatus is disclosed, for digital data transmission using higher order modulation schemes, wherein a plurality of bits is mapped to bit positions of a symbol and the transmission has different error probabilities for at least two out of the bit positions. Bits are selected from a data stream of original bits for repetition and repeated. Repeated and unrepeated bits are mapped to modulation symbols, wherein the mapping of bits to bit positions depends on the error probabilities of the bit positions and on the selection result.
摘要翻译： 公开了一种用于使用更高阶调制方案的数字数据传输的方法和装置，其中多个比特映射到符号的比特位置，并且该传输对于位位置中的至少两个具有不同的误差概率。 从用于重复和重复的原始比特的数据流中选择比特。 重复和未中继比特被映射到调制符号，其中比特到比特位置的映射取决于比特位置的错误概率和选择结果。
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9.发明授权Method for using a symbol mapper using a symbol mapping scheme to generate modulation symbols according to a different symbol mapping scheme and a method for generating a symbol mapping scheme 有权使用符号映射方法使用符号映射方法以根据不同符号映射方案生成调制符号的方法和用于生成符号映射方案的方法公开(公告)号：US07961814B2
公开(公告)日：2011-06-14
申请号：US11993967
申请日：2005-06-29
IPC分类号： H04L27/36
CPC分类号： H04L27/34
摘要： The invention relates to method and apparatus for generating modulation symbols according to a second symbol mapping scheme by a symbol mapping unit being adapted to generate symbols according to a first symbol mapping scheme, wherein the first and second symbol mapping schemes define different mappings of data words of a stream to modulation symbols of a modulation scheme according to the respective symbol mapping scheme. Further, the invention relates to a method and apparatus for generating a mapping of data words to modulation symbols of a square 16 QAM constellation, the modulation symbols being representable by an inphase component and quadrature component. One aspect of the invention is the introduction of a bit sequence transformer unit transforming the data words to be mapped to modulation symbols prior to mapping thereby changing the Hamming distance properties of the mapping. Another aspect of the invention is the generation of a new AICO (Antipodal Inverted COnstellation) mapping scheme.
摘要翻译： 本发明涉及一种用于根据第二符号映射方案通过符号映射单元产生适应于根据第一符号映射方案生成符号的调制符号的方法和装置，其中第一和第二符号映射方案定义数据字的不同映射 根据相应的符号映射方案的调制方案的调制符号的流。 此外，本发明涉及一种用于产生数据字到方形16QAM星座的调制符号的映射的方法和装置，所述调制符号可由同相分量和正交分量表示。 本发明的一个方面是引入一个比特序列变换器单元，在映射之前将要映射到数据字的映射到调制符号变换，从而改变映射的汉明距离属性。 本发明的另一个方面是生成新的AICO（Antipodal Inverted COnstellation）映射方案。
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公开(公告)号：US07957482B2
公开(公告)日：2011-06-07
申请号：US11996964
申请日：2005-07-26
IPC分类号： H04L5/12
CPC分类号： H04L27/3405 , H04L1/02 , H04L1/18 , H04L25/067 , H04L27/38
摘要： Transmit diversity system in which constellation rearrangement is used. Both diversity signals contain the same data and both are 16-QAM, but the location of the data bits within the constellation is different. This averages the effect of the different levels of reliability of the different constellation points. A method for modifying a quadruple of data bits in a data transmission system using Quadrature. Amplitude Modulation with 16 different modulation states, 16-QAM, using an Antipodal Inverted Constellation AICO) mapping, swapping bits selecting contiguous symbol regions with bits selecting non-contiguous symbol regions. Depending on the particular pre-defined mapping and on the particular permutation of bits, inversion of selected bits may be performed in addition. The quadruples thus obtained are mapped to modulation symbols according to a pre-defined AICO mapping. In the corresponding method for receiving the symbols, likelihood values are swapped and modified in a way which is complementary to the permutation and inversion of bits, before they are combined with likelihood values from other symbols representing the same bits. Method ensures that there is a one to one correspondence between Hamming distance and Euclidian distance for the combined received data. In other words it ensures that, once combined, all 4 bit data words which differ by the same number of bits (Hamming distance) are the same distance apart in the constellation (Euclidian distance).
摘要翻译： 使用星座重排的发射分集系统。 两个分集信号都包含相同的数据，并且都是16-QAM，但星座内的数据位的位置是不同的。 这平均了不同星座点的不同可靠性水平的影响。 一种用于使用Quadrature修改数据传输系统中的四倍数据位的方法。 使用16个不同调制状态的幅度调制，16-QAM，使用Antipodal反向星座AICO）映射，交换选择具有选择不连续符号区域的位的连续符号区的位。 根据特定的预定义映射和位的特定置换，可以另外执行所选位的反转。 根据预定义的AICO映射将由此获得的四倍数映射到调制符号。 在用于接收符号的相应方法中，在将它们与表示相同比特的其他符号的似然值组合之前，以与位的置换和反相互补的方式交换和修改似然值。 方法确保了组合接收数据的汉明距离和欧氏距离之间有一对一的对应关系。 换句话说，它确保一旦组合，通过相同位数（汉明距离）不同的所有4位数据字在星座（欧几里得距离）中是相同的距离。
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