专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US07042938B2 Soft bit computation for a reduced state equalizer 失效
公开(公告)号：US07042938B2
公开(公告)日：2006-05-09
申请号：US09928927
申请日：2001-08-13
申请人： Andrei Malkov , Heikki Berg , Pekka Kaasila , Kiran Kumar Kuchi , Jan C. Olivier
发明人： Andrei Malkov , Heikki Berg , Pekka Kaasila , Kiran Kumar Kuchi , Jan C. Olivier
IPC分类号： H04B1/38
CPC分类号： H04L25/03318 , H04L25/03235 , H04L2025/03401 , H04L2025/0342
摘要： Method and apparatus for soft bit computation with a reduced state equalizer. The method assures that the number of states in the equalizer is reduced to obtain acceptable complexity, while also ensuring that soft bit computation is performed for substantially all bits. The method involves computing a first set of soft bits from bits transmitted in a received signal, using a reduced-state trellis with finite non-zero delay, calculating hard decisions in response to the received signal, and also ensuring that substantially all soft bits are computed by employing zero-delay soft decision-making or decision-feedback equalization to compute a second set of soft bits. Furthermore, the hard decisions are used to compute the second set.

2. 发明授权

US06512802B1 Method and apparatus for equalization and data symbol detection for MPSK modulation 有权
标题翻译：用于MPSK调制的均衡和数据符号检测的方法和装置
公开(公告)号：US06512802B1
公开(公告)日：2003-01-28
申请号：US09407248
申请日：1999-09-28
申请人： Jan C. Olivier , Chengshan Xiao
发明人： Jan C. Olivier , Chengshan Xiao
IPC分类号： H04L2722
CPC分类号： H04L25/0216 , H04L25/0224 , H04L25/0244 , H04L25/03178
摘要： A method and an apparatus for detecting data symbols of a multiple-phase-shift-keying (MPSK) modulated slot used for radio reception of digital data are disclosed. The method and apparatus simultaneously accomplish signal equalization and symbol detection. A simplified algorithm is used which is sub-optimal but closely approximates an optimal solution which significantly reduces computational load. A solution vector is constructed and data symbol values in the solution vector are perturbated. After each perturbation, a solution error is computed to determine whether the perturbated value provides a better solution. Perturbation continues until an optimal solution is found or a maximum number of iterations have been performed. The advantage is an improved, cost-effective radio receiver which enables faster wireless data transfer.
摘要翻译：公开了一种用于检测用于数字数据的无线电接收的多相移键控（MPSK）调制槽的数据符号的方法和装置。该方法和装置同时实现信号均衡和符号检测。使用一个简单的算法，它是次优的，但是接近一个最大的解决方案，大大减少了计算量。构造解向量，解矢量中的数据符号值被扰动。在每个扰动之后，计算解决误差以确定扰动值是否提供了更好的解决方案。扰动继续，直到找到最佳解或最大次数迭代。优点是改进的，具有成本效益的无线电接收机，其能够实现更快的无线数据传输。

3. 发明授权

US06693568B2 Apparatus, and an associated method, for detecting digital data using MLSE detection with a dynamically-sized trellis 失效
标题翻译：用于使用动态尺寸网格的MLSE检测来检测数字数据的装置和相关方法
公开(公告)号：US06693568B2
公开(公告)日：2004-02-17
申请号：US09967391
申请日：2001-09-28
申请人： Jan C. Olivier
发明人： Jan C. Olivier
IPC分类号： H03M746
CPC分类号： H04L1/006 , H04L1/0048 , H04L1/005 , H04L25/03203 , H04L25/03229
摘要： Apparatus, and an associated method, for facilitating recovery of digital data communicated to a receiving station upon a non-ideal channel. Sequences of the data are applied to a reliability indicia generator having a trellis of low-complexity. The reliability indicia generator generates reliability information which is provided to a soft trellis decoder. The soft trellis decoder includes a dynamically-formed trellis of trellis sizes dependent upon the reliability information provided by thereliability indicia generator. When the reliability indicia generator indicates certain nodes of the trellis used to perform MLSE operations to be reliable, such nodes are removed out of the trellis. The MLSE operations performed at the soft trellis are thereby of reduced complexity levels.
摘要翻译：装置和相关联的方法，用于在非理想信道上便于恢复传送到接收站的数字数据。数据的序列被应用于具有低复杂度的网格的可靠性标记发生器。可靠性标记发生器产生提供给软网格解码器的可靠性信息。软网格解码器包括根据由可靠性标记发生器提供的可靠性信息的格状尺寸的动态形成网格。当可靠性标记发生器指示用于执行MLSE操作的某些节点可靠时，将这些节点从网格中移出。因此，在软网格上执行的MLSE操作因此降低了复杂度。

4. 发明授权

US06882694B2 Apparatus, and associated method, for estimating frequency offset of a data symbol communicated in a communication system 失效
标题翻译：用于估计在通信系统中传送的数据符号的频率偏移的装置和相关方法
公开(公告)号：US06882694B2
公开(公告)日：2005-04-19
申请号：US10335200
申请日：2002-12-31
申请人： Jan C. Olivier
发明人： Jan C. Olivier
IPC分类号： H04L27/00 , H04L27/18 , H04L25/08 , H04B1/00 , H04L27/22 , H04Q7/20
CPC分类号： H04L27/18 , H04L2027/003 , H04L2027/0065 , H04L2027/0089
摘要： Apparatus, and an associated method, for estimating frequency offset introduced upon symbols of a sequence communicated by a sending station to a data destination during operation of a communication system. A received sequence is rotated by multiplying the symbols thereof by offset values selected from a set of offset values. Then, for each rotated sequence, an estimation of a data sequence is made. Noise indicia associated with each estimated data sequence is calculated. And, comparisons are made of the noise indicia associated with each of the estimated data sequences. Responsive to the comparisons, selection is made of the frequency offset that has been introduced upon the data sequence.
摘要翻译：一种用于在通信系统的操作期间估计由发送站向数据目的地传送的序列的符号引入的频率偏移的装置和相关方法。通过将其符号乘以从一组偏移值中选择的偏移值来旋转接收的序列。然后，对于每个旋转的序列，进行数据序列的估计。计算与每个估计数据序列相关联的噪声标记。并且，与每个估计的数据序列相关联的噪声标记进行比较。响应于比较，选择在数据序列上引入的频率偏移。

5. 发明授权

US06370357B1 Mobile speed estimation for digital cellular radio systems 有权
标题翻译：数字蜂窝无线电系统的移动速度估计
公开(公告)号：US06370357B1
公开(公告)日：2002-04-09
申请号：US09217064
申请日：1998-12-21
申请人： Chengshan Xiao , Karl D. Mann , Jan C. Olivier
发明人： Chengshan Xiao , Karl D. Mann , Jan C. Olivier
IPC分类号： H04B1700
CPC分类号： G01S11/10 , G01S11/06 , H04W36/04
摘要： For a hierarchical mobile cellular communications system comprising a plurality of microcells and overlaid macrocells, a method is disclosed for estimating the speed of a mobile. The speed estimate assists in the assignment of slow-moving mobiles to microcells and fast-moving mobiles to macrocells, thus keeping the cellular system in optimum utilization. The method first calculates a power signal of the received signals. The power signal is then filtered and decimated. The speed of a mobile is estimated from a determination of the offset autocorrelation of the filtered and decimated power signal.
摘要翻译：对于包括多个微小区和重叠的宏小区的分级移动蜂窝通信系统，公开了一种用于估计移动台的速度的方法。速度估计有助于将缓慢移动的移动站分配给微小区和快速移动的移动站到宏小区，从而保持蜂窝系统的最佳利用。该方法首先计算接收信号的功率信号。然后对功率信号进行滤波和抽取。从确定滤波和抽取的功率信号的偏移自相关来估计移动台的速度。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式