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21. 发明授权

US6014373A Spread spectrum CDMA subtractive interference canceler system 失效
标题翻译：扩频CDMA减法干扰消除系统
公开(公告)号：US6014373A
公开(公告)日：2000-01-11
申请号：US939146
申请日：1997-09-29
申请人： Donald L. Schilling , John Kowalski , Shimon Moshavi
发明人： Donald L. Schilling , John Kowalski , Shimon Moshavi
IPC分类号： H04B1/10 , H04B1/12 , H04B1/707 , H04B1/709 , H04B1/7093 , H04B1/7107 , H04B7/216 , H04L7/00
CPC分类号： H04B1/71075 , H04B1/709 , H04B1/7093
摘要： A spread-spectrum code division multiple access interference canceler for reducing interference in a direct sequence CDMA receiver having N chip-code channels. The interference canceler includes a plurality of correlators or matched filters, a plurality of spread-spectrum-processing circuits, subtracting circuits, and channel correlators or channel-matched filters. Using a plurality of chip-code signals, the plurality of correlators despreads the spread-spectrum CDMA signal as a plurality of despread signals, respectively. The plurality of spread-spectrum-processing circuits uses a timed version of the plurality of chip-code signals, for spread-spectrum processing the plurality of despread signals, respectively, with a chip-code-signal corresponding to a respective despread signal. For recovering a code channel using an i.sup.th chip-code-signal, the subtracting circuits subtracts from the spread-spectrum CDMA signal, each of the N-1 spread-spectrum-processed-despread signals thereby generating a subtracted signal. The N-1 spread-spectrum-processed-despread signals do not include the spread-spectrum-processed-despread signal of the i.sup.th channel of the spread-spectrum CDMA signal. The channel correlator or channel-matched filter despreads the subtracted signal.
摘要翻译：一种用于减少具有N个码片信道的直接序列CDMA接收机中的干扰的扩频码分多址干扰消除器。干扰消除器包括多个相关器或匹配滤波器，多个扩频处理电路，减法电路和信道相关器或信道匹配滤波器。使用多个码片信号，多个相关器分别将扩频CDMA信号解扩展为多个解扩信号。多个扩频处理电路使用多个码片信号的定时版本，分别对应于各个去扩展信号的码片信号对多个解扩信号进行扩频处理。为了使用第i个芯片码信号恢复代码通道，减法电路从扩频CDMA信号中减去N-1个扩频处理的解扩信号，从而产生减法信号。 N-1扩频处理解扩信号不包括扩频CDMA信号的第i个信道的扩频处理解扩信号。信道相关器或信道匹配滤波器对相减信号进行解扩。

22. 发明授权

US08670418B2 Successive interference cancellation 有权
标题翻译：连续干扰消除
公开(公告)号：US08670418B2
公开(公告)日：2014-03-11
申请号：US13365757
申请日：2012-02-03
申请人： Joseph Charles Liberti, Jr. , Shimon Moshavi , Paul Gerald Zablocky
发明人： Joseph Charles Liberti, Jr. , Shimon Moshavi , Paul Gerald Zablocky
IPC分类号： H04B7/216
CPC分类号： H04B1/71055 , H04B1/71072 , H04B1/71075
摘要： Methods and systems in a wireless receiver for enabling the reception of input signals at varied power levels in the presence of co-channel interference utilizing combinations of space-time adaptive processing, interference cancellation multi-user detection, and combined techniques. In multi-user detection, code, timing, and possibly channel information of multiple users are jointly used to better detect each individual user. The novel combination of adaptive signal reconstruction techniques with interference cancellation techniques provides accurate temporal cancellation of interference with minimal interference residuals.
摘要翻译：无线接收机中的方法和系统，其利用空时自适应处理，干扰消除多用户检测和组合技术的组合，在存在同信道干扰的情况下，能够以不同的功率电平接收输入信号。在多用户检测中，共同使用多个用户的代码，定时和可能的信道信息来更好地检测每个用户。具有干扰消除技术的自适应信号重建技术的新颖组合提供了具有最小干扰残差的干扰的精确时间消除。

23. 发明授权

US07688777B2 Combined adaptive spatio-temporal processing and multi-user detection for CDMA wireless systems 有权
标题翻译：用于使无线接收机能够在存在干扰的情况下以不同的功率电平接收输入信号的装置和方法
公开(公告)号：US07688777B2
公开(公告)日：2010-03-30
申请号：US10971233
申请日：2005-01-31
申请人： Joseph Charles Liberti, Jr. , Shimon Moshavi , Paul Gerald Zablocky
发明人： Joseph Charles Liberti, Jr. , Shimon Moshavi , Paul Gerald Zablocky
IPC分类号： H04Q7/00
CPC分类号： H04B1/71055 , H04B1/71072 , H04B1/71075
摘要： Methods and systems in a wireless receiver for enabling the reception of input signals at varied power levels in the presence of co-channel interference utilizing combinations of space-time adaptive processing (STAP), interference cancellation multi-user detection (MUD), and combined STAP/MUD techniques. In MUD, code, timing, and possibly channel information of multiple users are jointly used to better detect each individual user. The novel combination of adaptive signal reconstruction techniques with interference cancellation MUD techniques provides accurate temporal cancellation of interference with minimal interference residuals. Additional methods and systems extend adaptive signal reconstruction techniques to take Doppler spread into account. STAP techniques permit a wireless receiver to exploit multiple antenna elements to form beams in the direction of the desired signal and nulls in the direction of the interfering signals. The combined STAP-MUD methods and systems increase the probability of successful user detection by taking advantage of the benefits of each reception method. An additional method and system utilizes STAP techniques in the case where no pilot signal is available. This method compares the outputs of various hypothesized STAP solutions.
摘要翻译：一种无线接收机中的方法和系统，用于在存在通过空时自适应处理（STAP），干扰消除多用户检测（MUD）和组合的组合的同信道干扰的情况下，以不同的功率电平接收输入信号 STAP-MUD技术。在MUD中，多个用户的代码，定时和可能的频道信息共同用于更好地检测每个用户。具有干扰消除MUD技术的自适应信号重建技术的新颖组合提供了具有最小干扰残差的干扰的精确时间消除。额外的方法和系统扩展自适应信号重建技术以考虑多普勒扩展。 STAP技术允许无线接收机利用多个天线元件在所需信号的方向上形成波束，并且在干扰信号的方向上为零。组合的STAP-MUD方法和系统通过利用每种接收方法的优点来增加成功的用户检测的概率。在没有导频信号可用的情况下，附加的方法和系统利用STAP技术。该方法比较各种假设的STAP解决方案的输出。

24. 发明授权

US5757791A Multistage linear receiver for DS-CDMA systems 失效
标题翻译：用于DS-CDMA系统的多级线性接收机
公开(公告)号：US5757791A
公开(公告)日：1998-05-26
申请号：US634160
申请日：1996-04-18
申请人： Emmanuel Kanterakis , Shimon Moshavi
发明人： Emmanuel Kanterakis , Shimon Moshavi
IPC分类号： H04B1/7105 , H04J13/02
CPC分类号： H04B1/7105
摘要： A multistage linear receiver for extracting data embedded in a received spread-spectrum signal having a plurality of channels using a direct sequence code division multiple access system. The multistage receiver comprises an initial plurality of spread-spectrum detectors, a plurality of detector weighting devices, a first plurality of product devices, a first combiner, a first plurality of spread-spectrum detectors, a first plurality of weight-product devices and an output combiner. The initial plurality of spread-spectrum detectors despreads and delays the plurality of channels to generate a plurality of detector-output signals. The detector weighting devices weight the plurality of detector-output signals with a plurality of detector weights as a plurality of weighted-detector signals. The plurality of detector-output signals are spread-spectrum processed by the first plurality of product devices to generate a first plurality of spread-spectrum signals which are combined by the first combiner as a first combined signal. The first plurality of spread-spectrum detectors despreads and delays the first combined signal as a first plurality of despread-combined signals which are weighted by the first plurality of weight-product devices to generate a first plurality of weighted signals. The output combiner combines the first plurality of weighted signals and the plurality of weighted-detector signals to extract the data. Additional stages comprising product devices, combiners and weight-product devices may be added as necessary or desired.
摘要翻译：一种用于使用直接序列码分多址系统提取嵌入在具有多个信道的接收扩频信号中的数据的多级线性接收机。多级接收机包括初始多个扩频检测器，多个检测器加权装置，第一多个产品装置，第一组合器，第一多个扩频检测器，第一多个加权产品装置和输出组合器。初始多个扩频检测器对多个信道进行解扩和延迟以产生多个检测器输出信号。检测器加权装置用多个检测器权重来加权多个检测器输出信号作为多个加权检测器信号。多个检测器输出信号由第一多个乘积装置进行扩频处理，以产生由第一组合器组合为第一组合信号的第一多个扩频信号。第一组多个扩频检测器对第一组合信号进行解扩和延迟，作为由第一多个加权乘积装置加权的第一多个解扩组合信号，以产生第一多个加权信号。输出组合器组合第一多个加权信号和多个加权检测器信号以提取数据。可以根据需要或需要添加包括产品装置，组合器和重量产品装置的附加阶段。

25. 发明授权

US5719852A Spread spectrum CDMA subtractive interference canceler system 失效
公开(公告)号：US5719852A
公开(公告)日：1998-02-17
申请号：US654994
申请日：1996-05-29
申请人： Donald L. Schilling , John Kowalski , Shimon Moshavi
发明人： Donald L. Schilling , John Kowalski , Shimon Moshavi
IPC分类号： H04B1/10 , H04B1/12 , H04B1/707 , H04B1/709 , H04B1/7093 , H04B1/7107 , H04B7/216 , H04L7/00 , H04J13/04
CPC分类号： H04B1/71075 , H04B1/709 , H04B1/7093
摘要： A spread-spectrum code division multiple access interference canceler for reducing interference in a direct sequence CDMA receiver having N chip-code channels. The interference canceler includes a plurality of correlators or matched filters, a plurality of spread-spectrum-processing circuits, subtracting circuits, and channel correlators or channel-matched filters. Using a plurality of chip-code signals, the plurality of correlators despreads the spread-spectrum CDMA signal as a plurality of despread signals, respectively. The plurality of spread-spectrum-processing circuits uses a timed version of the plurality of chip-code signals, for spread-spectrum processing the plurality of despread signals, respectively, with a chip-code-signal corresponding to a respective despread signal. For recovering a code channel using an i.sup.th chip-code-signal, the subtracting circuits subtracts from the spread-spectrum CDMA signal, each of the N-1 spread-spectrum-processed-despread signals thereby generating a subtracted signal. The N-1 spread-spectrum-processed-despread signals do not include the spread-spectrum-processed-despread signal of the i.sup.th channel of the spread-spectrum CDMA signal. The channel correlator or channel-matched filter despreads the subtracted signal.

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