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1. 发明授权

US06539067B1 Channel estimation using soft-decision feedback 有权
标题翻译：使用软判决反馈的信道估计
公开(公告)号：US06539067B1
公开(公告)日：2003-03-25
申请号：US09300495
申请日：1999-04-28
申请人： Carlo Luschi , Syed Aon Mujtaba , Magnus Sandell , Paul Edward Strauch , Ran-Hong Yan , Stephan ten Brink
发明人： Carlo Luschi , Syed Aon Mujtaba , Magnus Sandell , Paul Edward Strauch , Ran-Hong Yan , Stephan ten Brink
IPC分类号： H04L2706
CPC分类号： H04L25/0202
摘要： A method of estimating channel impulse response in a signal transmitted over a channel in a communication system is described. The channel estimator obtains a priori knowledge about the transmitted signal, and then uses the transmitted signal and the a priori knowledge to choose an estimate of channel impulse response which minimizes the expected distance between the transmitted signal and a reconstructed signal. The expected distance that is minimized is a cost function, represented by E{∥r−Bh∥2r}. By using soft decision feedback, the invention minimizes erroneous decision feedback which can cause error propagation. The decisions are usually in the form of log likelihood ratios (LLR).
摘要翻译：描述了在通信系统中通过信道发送的信号中估计信道脉冲响应的方法。信道估计器获得关于发射信号的先验知识，然后使用发射信号和先验知识来选择信道脉冲响应的估计，其使发射信号和重构信号之间的预期距离最小化。最小化的预期距离是由E {‖r-Bh‖2r}表示的成本函数。通过使用软判决反馈，本发明使可能导致错误传播的错误判定反馈最小化。决策通常是对数似然比（LLR）的形式。

2. 发明授权

US06271772B1 Method and apparatus for iterative decoding from a central pool 失效
标题翻译：从中央池迭代解码的方法和装置
公开(公告)号：US06271772B1
公开(公告)日：2001-08-07
申请号：US09235049
申请日：1999-01-21
申请人： Carlo Luschi , Syed Aon Mujtaba , Magnus Sandell , Paul Edward Strauch , Ran-Hong Yan , Stephan ten Brink
发明人： Carlo Luschi , Syed Aon Mujtaba , Magnus Sandell , Paul Edward Strauch , Ran-Hong Yan , Stephan ten Brink
IPC分类号： H03M734
CPC分类号： H03M13/2948 , H03M13/29
摘要： Apparatus and method for iteratively decoding a signal are provided. The apparatus includes a central pool of resources for iteratively decoding signals. The central pool may run a plurality of iterative decoding processes, each process being allocated to a signal processing unit upon request and depending upon resource availability.
摘要翻译：提供了用于迭代地解码信号的装置和方法。该装置包括用于迭代地解码信号的中央资源库。中央池可以运行多个迭代解码过程，每个进程根据请求分配给信号处理单元，并且取决于资源可用性。

3. 发明授权

US06553011B1 Cellular multicarrier wireless communication system 有权
标题翻译：蜂窝多载波无线通信系统
公开(公告)号：US06553011B1
公开(公告)日：2003-04-22
申请号：US09188026
申请日：1998-11-06
申请人： Ran-Hong Yan , Stephan ten Brink
发明人： Ran-Hong Yan , Stephan ten Brink
IPC分类号： H04B7204
CPC分类号： H04W16/00 , H04L5/023
摘要： A cellular multicarrier wireless communication system is disclosed, in which base stations for a cluster of two or more respective cells transmit the same signaling information in synchronism on the same group of subcarriers. This allows the combination of several base station signals ‘on the air’ prior to the receiver's antenna, without using any additional hardware for signal combination in the mobile terminal.
摘要翻译：公开了一种蜂窝式多载波无线通信系统，其中两个或多个相应小区的群集的基站在相同的子载波组上同步地发送相同的信令信息。这允许在接收机的天线之前“空中”上的几个基站信号的组合，而不需要在移动终端中用于信号组合的任何附加硬件。

4. 发明授权

US07779338B2 Deinterleaver and dual-viterbi decoder architecture 有权
标题翻译：去交织器和双维特比解码器架构
公开(公告)号：US07779338B2
公开(公告)日：2010-08-17
申请号：US11490844
申请日：2006-07-21
申请人： Mustafa Altintas , Turgut Aytur , Ravishankar H. Mahadevappa , Feng Shi , Stephan ten Brink , Ran Yan
发明人： Mustafa Altintas , Turgut Aytur , Ravishankar H. Mahadevappa , Feng Shi , Stephan ten Brink , Ran Yan
IPC分类号： H03M13/03
CPC分类号： H03M13/41 , H03M13/27 , H03M13/6561 , H03M13/6566 , H04L1/0054 , H04L1/0059 , H04L1/0068 , H04L1/0071 , H04L1/06
摘要： Pairs of parallel Viterbi decoders use windowed block data for decoding data at rates above 320 Mbps. Memory banks of the deinterleavers feeding the decoders operate such that some are receiving data while others are sending data to the decoders. Parallel input streams to every pair of decoders overlap for several traceback lengths of the decoder causing data input to a first decoder at the end of an input stream to be the same as the data input to a second decoder of the same pair at the beginning of an input stream. Then, the first decoder is able to post-synchronize its path metric with the second decoder and the second decoder is able to pre-synchronize its path metric with the first. Either, the deinterleaver data length is an integer multiple of the traceback length or the data input to only the first block of the first interleaver is padded.
摘要翻译：一对并行维特比解码器使用窗口块数据，以高于320 Mbps的速率解码数据。供给解码器的解交织器的存储器操作，使得一些接收数据，而其他数据传送到解码器。对于每对解码器的并行输入流与解码器的几个回溯长度重叠，导致在输入流结束时输入到第一解码器的数据输入与输入到相同对的第二解码器的数据相同一个输入流。然后，第一解码器能够与第二解码器后同步其路径度量，并且第二解码器能够将其路径度量与第一解码器预先同步。或者，解交织器数据长度是回溯长度的整数倍，或仅填充第一交织器的第一块的数据输入。

5. 发明授权

US07738575B2 Overlap-and-add with DC-offset correction 有权
标题翻译：重叠和加法直流偏移校正
公开(公告)号：US07738575B2
公开(公告)日：2010-06-15
申请号：US11490850
申请日：2006-07-21
申请人： Ravishankar H. Mahadevappa , Stephan ten Brink
发明人： Ravishankar H. Mahadevappa , Stephan ten Brink
IPC分类号： H04K1/10
CPC分类号： H04L25/061 , H04B1/715 , H04L25/06 , H04L27/2601 , H04L27/2605 , H04L27/2607 , H04L27/2647
摘要： A method and system for estimating DC offset and removing the excess DC offset from samples used by an overlap-and-add operation at the receiver of OFDM symbols in UWB communication. The DC offset for each sample within the overlap-and-add interval may be estimated using a sliding window, of the size required for an FFT, operation over past samples. The DC offset may be estimated for a sample within the overlap-and-add interval and updated for the succeeding samples. A size of the overlap-and-add interval may be fixed or may be allowed to vary according to switching characteristics of an analog RF stage preceding the overlap-and-add operation.
摘要翻译：一种用于估计DC偏移并从UWB通信中的OFDM符号的接收机处的重叠和加法运算使用的样本中去除多余的DC偏移的方法和系统。可以使用具有FFT过程所需大小的滑动窗口来估计重叠和添加间隔内的每个采样的DC偏移，对以前的采样进行操作。可以针对重叠和添加间隔内的样本估计DC偏移量，并为后续样本进行更新。重叠和添加间隔的大小可以是固定的，或者可以根据重叠和添加操作之前的模拟RF级的切换特性而变化。

6. 发明授权

US6038450A Soft handover system for a multiple sub-carrier communication system and method thereof 失效
标题翻译：一种多子载波通信系统的软切换系统及其方法
公开(公告)号：US6038450A
公开(公告)日：2000-03-14
申请号：US928307
申请日：1997-09-12
申请人： Stephan ten Brink , Richard D. J. van Nee
发明人： Stephan ten Brink , Richard D. J. van Nee
IPC分类号： H04J11/00 , H04B7/02 , H04W36/18 , H04Q7/20 , H04Q7/36
CPC分类号： H04L27/2626 , H04B7/022 , H04L27/2647 , H04W36/18
摘要： A soft handover system is provided for a multiple sub-carrier communication system, applicable to the uplink (mobile unit to base stations) and/or the downlink (base stations to mobile unit). The soft handover system uses multiple sub-carriers to simultaneously transmit multiple sub-carrier signals between at least two base stations and the mobile unit in the uplink and/or downlink. In certain embodiments, the soft handover system provides for synchronized multiple sub-carrier transmission such that the delay differences between the multiple sub-carrier transmissions from the different base stations arriving at the mobile unit are within the guard time of the multiple sub-carrier symbols. Certain embodiments of the soft handover system use the same set of sub-carriers for links between the mobile unit and the base stations of different cells, and other embodiments use different sets of sub-carriers for links between the mobile unit and the base stations of different cells. In the soft handover system using the same set of sub-carriers, the mobile unit receives downlink signals with identical data content from the different base stations. The mobile unit need not distinguish between the signals from the different base stations. The mobile unit just treats the downlink signals from the different base stations as multipath components, thereby increasing the diversity gain. In the case of a multiple sub-carrier CDMA system, the soft handover system can use the same sub-carriers as well as the same CDMA encoding and/or spreading code.
摘要翻译：为适用于上行链路（移动单元到基站）和/或下行链路（基站到移动单元）的多子载波通信系统提供软切换系统。软切换系统使用多个子载波在上行链路和/或下行链路中在至少两个基站与移动单元之间同时发送多个子载波信号。在某些实施例中，软切换系统提供同步的多载波传输，使得来自到达移动单元的不同基站的多个子载波传输之间的延迟差在多个子载波符号的保护时间之内。软切换系统的某些实施例对移动单元和不同小区的基站之间的链路使用相同的子载波集合，并且其他实施例对移动单元和基站之间的链路使用不同的子载波集合不同的细胞。在使用同一组子载波的软切换系统中，移动单元从不同的基站接收具有相同数据内容的下行链路信号。移动单元不需要区分来自不同基站的信号。移动单元仅将来自不同基站的下行链路信号视为多径分量，从而增加分集增益。在多子载波CDMA系统的情况下，软切换系统可以使用相同的子载波以及相同的CDMA编码和/或扩展码。

7. 发明申请

US20120140794A1 Automatic Gain Control for Frequency-Hopped OFDM 有权
标题翻译：跳频OFDM自动增益控制
公开(公告)号：US20120140794A1
公开(公告)日：2012-06-07
申请号：US13372577
申请日：2012-02-14
申请人： Turgut Aytur , Stephan ten Brink , Ravishankar H. Mahadevappa , Ran Yan
发明人： Turgut Aytur , Stephan ten Brink , Ravishankar H. Mahadevappa , Ran Yan
IPC分类号： H04B1/713
CPC分类号： H04L27/2601 , H03G3/3068 , H04B1/71637 , H04L27/2647
摘要： An automatic gain control method and system for use in signal processing of OFDM symbols at a receiver. Two stages of coarse and fine automatic gain control are implemented that adjust different gains in an analog RF processing stage of the receiver. Gain of a low noise amplifier and a mixer are adjusted during a first and coarse automatic gain control stage based on feedback from a digital baseband stage. During a subsequent fine gain control period, the gain of a programmable gain amplifier is adjusted separately for each frequency band used by the OFDM symbols based on a histogram bin that counts the number of output samples of an analog to digital converter whose magnitude falls within certain ranges. Coarse and fine gains are updated after each OFDM symbol.
摘要翻译：一种用于在接收机处对OFDM符号进行信号处理的自动增益控制方法和系统。实现两级粗略和精细的自动增益控制，可在接收机的模拟RF处理阶段调整不同的增益。基于来自数字基带级的反馈，在第一和粗略的自动增益控制级中调整低噪声放大器和混频器的增益。在随后的精细增益控制周期期间，可编程增益放大器的增益分别针对由OFDM符号使用的每个频带进行调整，所述频带基于对其幅度在一定范围内的模数转换器的输出样本数进行计数的直方图单元范围。在每个OFDM符号之后更新粗和细增益。

8. 发明授权

US08014435B2 System and method using high performance preamble cover sequences for multi-band OFDM two-band hopping modes 有权
标题翻译：用于多频带OFDM双频段跳频模式的高性能前同步码覆盖序列的系统和方法
公开(公告)号：US08014435B2
公开(公告)日：2011-09-06
申请号：US12110203
申请日：2008-04-25
申请人： Stephan ten Brink , Ravishankar H. Mahadevappa , John Coffey
发明人： Stephan ten Brink , Ravishankar H. Mahadevappa , John Coffey
IPC分类号： H04B1/00
CPC分类号： H04L27/2613 , H04L27/2656
摘要： Methods and systems for packet preamble sequences are provided. The preamble sequences are produce by multiplying preestablished base sequences by cover sequences. The cover sequences are chosen for high-performance in multi-band OFDM systems with modes that include two-band hopping.
摘要翻译：提供了用于分组前同步码序列的方法和系统。前序序列是通过覆盖序列乘以预先确定的碱基序列产生的。在具有包括双波段跳变的模式的多频带OFDM系统中选择覆盖序列用于高性能。

9. 发明授权

US07986739B2 Detect-and-avoid method and architecture for ultra-wideband system 有权
标题翻译：检测和避免超宽带系统的方法和架构
公开(公告)号：US07986739B2
公开(公告)日：2011-07-26
申请号：US12036968
申请日：2008-02-25
申请人： Turgut Aytur , Stephan ten Brink , Ravishankar H. Mahadevappa , Venkatesh Rajendran
发明人： Turgut Aytur , Stephan ten Brink , Ravishankar H. Mahadevappa , Venkatesh Rajendran
IPC分类号： H04L27/28
CPC分类号： H04L5/0062 , H04L5/0007 , H04L27/0006
摘要： A method and system for detecting the presence of narrowband transmitters utilizing frequencies also utilized by wider band communication systems. In some embodiments an ultrawideband transceiver detects signals at specific frequencies within a spectrum of frequencies, and analyzes the signals to determine if the signals indicate transmissions by a narrowband transmitter in a narrowband communication system. In further embodiments transmission circuitry reduces signal components at frequencies occupied by the narrowband transmitters.
摘要翻译：一种用于利用更宽频带通信系统也利用的频率来检测窄带发射机的存在的方法和系统。在一些实施例中，超宽带收发器在频谱范围内检测特定频率的信号，并分析信号以确定信号是否指示窄带通信系统中窄带发射机的传输。在另外的实施例中，传输电路在由窄带发射机占据的频率处减少信号分量。

10. 发明授权

US07916798B2 Automatic gain control for frequency-hopped OFDM 有权
标题翻译：跳频OFDM自动增益控制
公开(公告)号：US07916798B2
公开(公告)日：2011-03-29
申请号：US11506754
申请日：2006-08-18
申请人： Turgut Aytur , Stephan ten Brink , Ravishankar H. Mahadevappa , Ran Yan
发明人： Turgut Aytur , Stephan ten Brink , Ravishankar H. Mahadevappa , Ran Yan
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L27/2601 , H03G3/3068 , H04B1/71637 , H04L27/2647
摘要： An automatic gain control method and system for use in signal processing of OFDM symbols at a receiver. Two stages of coarse and fine automatic gain control are implemented that adjust different gains in an analog RF processing stage of the receiver. Gain of a low noise amplifier and a mixer are adjusted during a first and coarse automatic gain control stage based on feedback from a digital baseband stage. During a subsequent fine gain control period, the gain of a programmable gain amplifier is adjusted separately for each frequency band used by the OFDM symbols based on a histogram bin that counts the number of output samples of an analog to digital converter whose magnitude falls within certain ranges. Coarse and fine gains are updated after each OFDM symbol.
摘要翻译：一种用于在接收机处对OFDM符号进行信号处理的自动增益控制方法和系统。实现两级粗略和精细的自动增益控制，可在接收机的模拟RF处理阶段调整不同的增益。基于来自数字基带级的反馈，在第一和粗略的自动增益控制级中调整低噪声放大器和混频器的增益。在随后的精细增益控制周期期间，可编程增益放大器的增益针对OFDM符号使用的每个频带单独调整，该直方图单元基于对模数转换器的输出样本的数量进行计数，该模数转换器的幅度在一定范围内范围。在每个OFDM符号之后更新粗和细增益。

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