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    • 12. 发明申请
    • Combined adaptive spatio-temporal processing and multi-user detection for CDMA wireless systems
    • CDMA无线系统的组合自适应时空处理和多用户检测
    • US20050128985A1
    • 2005-06-16
    • US10971233
    • 2005-01-31
    • Joseph LibertiShimon MoshaviPaul Zablocky
    • Joseph LibertiShimon MoshaviPaul Zablocky
    • H04B1/707H04B1/7105H04B1/7107H04B7/216
    • H04B1/71055H04B1/71072H04B1/71075
    • 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.
    • 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。
    • 15. 发明申请
    • Parallel interference cancellation and minimum cost channel estimation
    • 并行干扰消除和最小成本信道估计
    • US20050111414A1
    • 2005-05-26
    • US10971237
    • 2005-01-27
    • Joseph LibertiShimon MoshaviPaul Zablocky
    • Joseph LibertiShimon MoshaviPaul Zablocky
    • H04B1/707H04B1/7105H04B1/7107H04B7/216
    • H04B1/71055H04B1/71072H04B1/71075
    • 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.
    • 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。
    • 16. 发明授权
    • Spread spectrum CDMA interference canceler system and method
    • 扩频CDMA干扰消除系统和方法
    • US5553062A
    • 1996-09-03
    • US279477
    • 1994-07-26
    • Donald L. SchillingJohn KowalskiShimon Moshavi
    • Donald L. SchillingJohn KowalskiShimon Moshavi
    • H04B1/10H04B1/12H04B1/707H04B1/709H04B1/7093H04B1/7107H04B7/216H04L7/00H04J13/04
    • H04B1/71075H04B1/709H04B1/7093
    • A spread-spectrum code division multiple access interference canceler system and method for reducing interference in a spread-spectrum CDMA receiver having N chip-code channels, with each of the N channels identified by a distinct chip-code signal. The interference canceler system comprises a plurality of interference cancelers, each having chip-code generators, delay devices, correlators, spread-spectrum-processing circuits, and subtracting means. Using a plurality of chip-code signals, the correlators despread the spread-spectrum CDMA signal as a plurality of despread signals, respectively. The spread-spectrum-processing circuits use a timed version of the plurality of chip-code signals, generated by the delay devices, for spread-spectrum processing the plurality of despread signals, respectively, with a timed chip-code-signal corresponding to a respective despread signal. For recovering a channel, subtracting means subtracts the spread-spectrum-processed-despread signals other than the signal of the desired channel of the spread-spectrum CDMA signal. The system may further comprise a CDMA/DS detector for receiving a spread-spectrum signal, a plurality of interference cancelers connected in series for generating a plurality of estimates of the spread-spectrum signal, combining means for combining the estimates as averaged estimates, and decision means for receiving the averaged estimates.
    • 一种扩频码分多址干扰消除器系统和方法,用于减少具有N个码片信道的扩频CDMA接收机中的干扰,其中每个N个信道由不同的码片信号识别。 干扰消除器系统包括多个干扰消除器,每个干扰消除器具有芯片码发生器,延迟器件,相关器,扩频处理电路和减法装置。 使用多个码片信号,相关器分别将扩频CDMA信号解扩展为多个解扩信号。 扩展频谱处理电路使用由延迟装置产生的多个码片信号的定时版本,以分别对与多个解扩信号对应的定时芯片码信号进行扩频处理 各自的解扩信号。 为了恢复信道,减法装置减去除了扩频CDMA信号的期望信道的信号之外的扩频处理的解扩信号。 该系统还可以包括用于接收扩频信号的CDMA / DS检测器,串联连接的多个干扰消除器,用于产生扩频信号的多个估计,用于将估计值作为平均估计值组合的组合装置和 用于接收平均估计的决定手段。
    • 18. 发明授权
    • Parallel interference cancellation and minimum cost channel estimation
    • 并行干扰消除和最小成本信道估计
    • US08111669B2
    • 2012-02-07
    • US10971237
    • 2005-01-27
    • Joseph Charles Liberti, Jr.Shimon MoshaviPaul Gerald Zablocky
    • Joseph Charles Liberti, Jr.Shimon MoshaviPaul Gerald Zablocky
    • H04B7/216
    • H04B1/71055H04B1/71072H04B1/71075
    • 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.
    • 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。