-
公开(公告)号：EP1547419A1
公开(公告)日：2005-06-29
申请号：EP02781195.9
申请日：2002-09-27
发明人： SCHULIST, Matthias , FRANK, Georg , SCHOTTEN, Hans
CPC分类号： H04W52/50 , H04W36/16 , H04W52/228 , H04W52/36 , H04W74/008 , H04W74/0833
摘要： A method, a computer program product and a device for requesting access to a node (BS) of a wireless communications network (10) are described. In the network (10) identification codes are used to differentiate access requests of different network components (UE). The method comprises the step of determining information about a transmission path (12) to e.g. the network node (BS), the step of determining an identification code in dependence on the determined transmission path information, wherein previously an association between identification codes and transmission path information has been established, and the step of modulating the selected identification code onto a signal to generate an access request signal carrying transmission path information.
-
公开(公告)号：EP1451962A1
公开(公告)日：2004-09-01
申请号：EP01991813.5
申请日：2001-12-10
发明人： SCHULIST, Matthias , WACHSMANN, Udo
CPC分类号： H04L1/0059 , H04L1/0041 , H04L1/0066 , H04L1/0067 , H04L1/0071 , H04L25/05
摘要： This invention relates to improved rate matching methods and apparati for matching the size of an input data block to a target block size, as well as to improved decoding methods and apparati for decoding a received data block originating from a transmitter adapted to execute one of said improved rate matching methods. According to the improved rate matching methods, so-called 'fill bits', i.e. bits with predetermined values, are inserted prior to the generation of redundant information in a channel encoding step, while only a residual adjustment in block size may or may not be necessary after channel encoding. According to the improved decoding methods, decoded bits corresponding to said fill bits are removed after channel decoding while only a residual (de)adjustment in block size may or may not be necessary before channel decoding.
-
3.发明授权Search window delay tracking in code division multiple access communication systems 有权码分多址通信系统中的搜索窗延迟跟踪
公开(公告)号：EP1082820B1
公开(公告)日：2006-08-23
申请号：EP99948574.1
申请日：1999-04-29
IPC分类号： H04B1/707
CPC分类号： H04B1/7085 , G01S5/0215 , H04B1/7113 , H04B1/7117
摘要： The present invention provides a search window delay tracking procedure for use in a multipath search processor of a CDMA radio receiver. A channel impulse response is estimated for a received signal containing plural paths, each path having a corresponding path delay. A search window defines a delay profile that contains the plural paths of the received signal. A mean or average delay is calculated for the estimated channel impulse response (CIR), and an error is determined between the mean CIR delay and a desired delay position corresponding to the center of the CIR search window. An adjustment is made to reduce that error so that the center of the search window and the mean CIR delay are aligned. The error may be processed either linearly (in one embodiment) or non-linearly (in another embodiment) to minimize the error and to reduce an influence of noise. A non-linear filtering process includes calculating a delay spread from the mean CIR delay calculated for successive processing cycles of a window delay tracking procedure corresponding to each new input. A difference is determined between the successive delay spreads. Adjustment signal is set equal to the error signal if the difference is less than or equal to a threshold. Alternatively, the adjustment signal is set to zero if the difference is greater than the threshold. Consequently, if the delay spread in the current iteration is significantly different from the delay spread in the previous iteration, the new error sample calculated in the current iteration is considered unreliable, and no adjustment is made.
摘要翻译： 本发明提供了用于CDMA无线电接收机的多路径搜索处理器中的搜索窗口延迟跟踪过程。 为包含多个路径的接收信号估计信道脉冲响应，每个路径具有对应的路径延迟。 搜索窗口定义了包含接收信号的多个路径的延迟分布。 计算估计的信道脉冲响应（CIR）的平均或平均延迟，并且在平均CIR延迟和对应于CIR搜索窗口的中心的期望延迟位置之间确定误差。 进行调整以减少该错误，使得搜索窗口的中心和平均CIR延迟对齐。 可以线性地（在一个实施例中）或非线性地（在另一个实施例中）处理该误差以最小化误差并且减少噪声的影响。 非线性滤波处理包括根据对应于每个新输入的窗延迟追踪过程的连续处理循环计算的平均CIR延迟来计算延迟扩展。 在连续的延迟差值之间确定差值。 如果差值小于或等于阈值，则将调整信号设置为等于误差信号。 或者，如果差值大于阈值，则调整信号被设置为零。 因此，如果当前迭代中的延迟扩展与先前迭代中的延迟扩展明显不同，则在当前迭代中计算的新的误差样本被认为是不可靠的，并且不进行调整。
-
4.发明公开
公开(公告)号：EP1543633A1
公开(公告)日：2005-06-22
申请号：EP02777245.8
申请日：2002-09-27
发明人： SCHULIST, Matthias
IPC分类号： H04B1/707
CPC分类号： H04B1/7115 , H04B1/712
摘要： The invention relates to a method, a computer program product and a device for evaluating a code which is orthogonal to one or more further codes. The method comprises the steps of receiving a signal which carries a code containing a sequence of code symbols, determining for a particular symbol instant at least one channel estimate, determining for the particular symbol instant a compensation value taking into account the at least one channel estimate, compensating each code symbol using the compensation value determined for the corresponding symbol instant, wherein the compensation is performed such that an original power relationship among the individual code symbols contained in the code is restored, and evaluating the code on the basis of the sequence of compensated code symbols exploiting the orthogonality to further codes.
-
5.发明授权
公开(公告)号：EP1543633B1
公开(公告)日：2006-11-15
申请号：EP02777245.8
申请日：2002-09-27
发明人： SCHULIST, Matthias
IPC分类号： H04B1/707
CPC分类号： H04B1/7115 , H04B1/712
摘要： The invention relates to a method, a computer program product and a device for evaluating a code which is orthogonal to one or more further codes. The method comprises the steps of receiving a signal which carries a code containing a sequence of code symbols, determining for a particular symbol instant at least one channel estimate, determining for the particular symbol instant a compensation value taking into account the at least one channel estimate, compensating each code symbol using the compensation value determined for the corresponding symbol instant, wherein the compensation is performed such that an original power relationship among the individual code symbols contained in the code is restored, and evaluating the code on the basis of the sequence of compensated code symbols exploiting the orthogonality to further codes.
-
公开(公告)号：EP1451962B1
公开(公告)日：2006-07-26
申请号：EP01991813.5
申请日：2001-12-10
发明人： SCHULIST, Matthias , WACHSMANN, Udo
CPC分类号： H04L1/0059 , H04L1/0041 , H04L1/0066 , H04L1/0067 , H04L1/0071 , H04L25/05
摘要： This invention relates to improved rate matching methods and apparati for matching the size of an input data block to a target block size, as well as to improved decoding methods and apparati for decoding a received data block originating from a transmitter adapted to execute one of said improved rate matching methods. According to the improved rate matching methods, so-called "fill bits", i.e. bits with predetermined values, are inserted prior to the generation of redundant information in a channel encoding step, while only a residual adjustment in block size may or may not be necessary after channel encoding. According to the improved decoding methods, decoded bits corresponding to said fill bits are removed after channel decoding while only a residual (de)adjustment in block size may or may not be necessary before channel decoding.
-
7.发明授权OPTIMUM TURBO DECODING ARCHITECTURE AND METHOD USING A CONSTANT OR QUASI-CONSTANT SIGNAL-TO-NOISE RATIO 有权优化Turbo译码体系及方法具有均匀或准恒定的信号噪声比应用
公开(公告)号：EP1190489B1
公开(公告)日：2002-11-13
申请号：EP00935061.2
申请日：2000-05-18
CPC分类号： H04W52/12 , H03M13/2957 , H03M13/612 , H03M13/658 , H04W52/20 , H04W52/24
-
公开(公告)号：EP1547419B1
公开(公告)日：2007-06-13
申请号：EP02781195.9
申请日：2002-09-27
发明人： SCHULIST, Matthias , FRANK, Georg , SCHOTTEN, Hans
CPC分类号： H04W52/50 , H04W36/16 , H04W52/228 , H04W52/36 , H04W74/008 , H04W74/0833
摘要： A method, a computer program product and a device for requesting access to a node (BS) of a wireless communications network (10) are described. In the network (10) identification codes are used to differentiate access requests of different network components (UE). The method comprises the step of determining information about a transmission path (12) to e.g. the network node (BS), the step of determining an identification code in dependence on the determined transmission path information, wherein previously an association between identification codes and transmission path information has been established, and the step of modulating the selected identification code onto a signal to generate an access request signal carrying transmission path information.
-
公开(公告)号：EP1137981B1
公开(公告)日：2007-03-07
申请号：EP99973136.7
申请日：1999-11-03
发明人： SCHULIST, Matthias
IPC分类号： G06F7/552
CPC分类号： G06F7/552 , G06F2207/5523
摘要： The present application relates to a device and method for processing a digital value to thereby determine an estimate of the square of said digital value. This is done by linearly approximating the square function with the help of anchor points that are powers of 2, such that the estimate of the square of a digital value xa is determined on the basis of a first processing value 2i, where 2i ≤x¿a? ∫2?i+1¿, and a second processing value (3x¿a? - 2?i+1¿). The present invention is advantageous in that it allows simple processing steps and a simple processing hardware. It is preferably applied to the mean signal power estimation of a digital signal being sent to a transmitter.
-
10.发明公开OPTIMUM TURBO DECODING ARCHITECTURE AND METHOD USING A CONSTANT OR QUASI-CONSTANT SIGNAL-TO-NOISE RATIO 有权优化Turbo译码体系及方法具有均匀或准恒定的信号噪声比应用
公开(公告)号：EP1190489A1
公开(公告)日：2002-03-27
申请号：EP00935061.2
申请日：2000-05-18
CPC分类号： H04W52/12 , H03M13/2957 , H03M13/612 , H03M13/658 , H04W52/20 , H04W52/24
摘要： Use of a more accurate, constant or quasi-constant reference signal-to-noise ratio value to support the process of decoding information sequences that have been encoded using turbo coding techniques, particularly in UMTS WCDMA receivers, enhances the accuracy of the decoding process and, in turn, link quality and overall system performance. This may be accomplished by exploiting the reference SNR, which is generated, for example, by the power control loop in the receiver. More specifically, the present invention modifies this reference SNR value based on various factors including, but not limited to, the scaling factor that is applied to the decoder input metrics, power settings, processing gains, coding rates and/or the modulation scheme.
-
-
-
-
-
-
-
-
-
搜索结果
11 条记录 (耗时 0.018 秒)
