专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

21. 发明授权

US10705176B2 Signal direction processing for an antenna array 有权
公开(公告)号：US10705176B2
公开(公告)日：2020-07-07
申请号：US14882034
申请日：2015-10-13
申请人： David K. Mesecher
发明人： David K. Mesecher
IPC分类号： G01S3/32 , G01S3/46 , H04B7/08 , H01Q3/26 , H04K3/00
摘要： Systems and methods are provided for determining a direction of a signal received at an antenna array. An antenna array includes a plurality of antenna elements, including a reference element. A signal combiner element is configured to combine weighted signals from a subset of the plurality of antenna elements to provide a composite output. An adaptive processing component is configured to determine an optimal set of weights for the subset of the plurality of antenna elements. An angle of arrival search component is configured to find a direction of minimum gain given the optimal set of weights.

22. 发明申请

US20110151923A1 HIGH-PERFORMANCE CELLULAR TELEPHONE RECEIVER 有权
标题翻译：高性能蜂窝电话接收机
公开(公告)号：US20110151923A1
公开(公告)日：2011-06-23
申请号：US12645683
申请日：2009-12-23
申请人： David K. Mesecher
发明人： David K. Mesecher
IPC分类号： H04B1/10 , H04M1/00 , H04L27/00 , H04L1/02 , H04B7/10
CPC分类号： H04B7/086 , H04L25/0204 , H04L25/0226 , H04L25/03343 , H04L2025/03426 , H04L2025/03783
摘要： A receiver includes a plurality of antennas; a plurality of front end circuits producing digital signals in response to signals received on the antennas; a beamforming unit weighting and summing the digital signals to produce a first signal; a first stage including a first plurality of modems producing first bit streams in response to components of the first signal, a first plurality of signal reconstruction units producing first signal replicas in response to the first bit streams, and a first active cancellation unit weighting the first signal replicas and subtracting the weighted first signal replicas from the first signal to produce a second signal; and a second stage including a second plurality of modems producing second bit streams in response to components of the second signal, a second plurality of signal reconstruction units producing second signal replicas in response to the second bit streams, and a second active cancellation unit weighting the second signal replicas and subtracting the weighted second signal replicas from the first signal to produce a third signal. A method implemented by the receiver is also provided.
摘要翻译：接收机包括多个天线; 多个前端电路响应于在天线上接收的信号产生数字信号; 波束成形单元对数字信号进行加权和求和以产生第一信号; 第一级，包括响应于第一信号的分量产生第一比特流的第一多个调制解调器，响应于第一比特流产生第一信号副本的第一多个信号重建单元，以及第一主动消除单元，信号副本，并从第一信号中减去加权的第一信号副本以产生第二信号; 以及第二级，包括响应于第二信号的分量产生第二比特流的第二多个调制解调器，响应于第二比特流产生第二信号副本的第二多个信号重建单元，以及第二主动消除单元，第二信号副本，并从第一信号中减去加权的第二信号副本以产生第三信号。还提供了由接收机实现的方法。

23. 发明授权

US07116701B2 Base station using an antenna array for location determination 有权
标题翻译：基站使用天线阵列进行位置确定
公开(公告)号：US07116701B2
公开(公告)日：2006-10-03
申请号：US10838599
申请日：2004-05-04
申请人： David K. Mesecher
发明人： David K. Mesecher
IPC分类号： A04B1/69 , H04B1/707 , H04B1/713
CPC分类号： H04W64/00 , G01S5/0215 , G01S5/12
摘要： A base station comprises a plurality of antennas. Each of the antennas is separated by a known distance. A first spread spectrum signal is transmitted having a first code. Using the plurality of antennas, a second spread spectrum signal is received having a second code. The second spread spectrum signal is time synchronized with the first spread spectrum signal. A distance determination is made based on in part a timing difference between the second code of the received second spread spectrum signal and the first code of the base station's transmitted first spread spectrum signal. A phase difference of a carrier signal of the second spread spectrum signal as received by each of the plurality of antennas is compared. An angle of the received second spread spectrum signal is determined using the known distance between the antennas and the phase difference. A location of a source of the second spread spectrum signal is determined using the determined angle and the distance determination.
摘要翻译：基站包括多个天线。每个天线以已知的距离分开。发送具有第一码的第一扩频信号。使用多个天线，接收具有第二码的第二扩频信号。第二扩频信号与第一扩频信号时间同步。基于部分地基于接收到的第二扩频信号的第二码与基站发送的第一扩频信号的第一码之间的定时差进行距离确定。比较由多个天线中的每一个接收的第二扩频信号的载波信号的相位差。使用天线之间的已知距离和相位差来确定接收的第二扩频信号的角度。使用所确定的角度和距离确定来确定第二扩频信号的源的位置。

24. 发明授权

US06940875B2 Continuously adjusted-bandwidth discrete-time phase-locked loop 失效
标题翻译：连续调整带宽离散时间锁相环
公开(公告)号：US06940875B2
公开(公告)日：2005-09-06
申请号：US10643792
申请日：2003-08-19
申请人： David K. Mesecher , Rui Yang , Ramon Cerda
发明人： David K. Mesecher , Rui Yang , Ramon Cerda
IPC分类号： H04L27/22 , H04B1/707 , H04B1/7085 , H04B1/7117 , H04B7/216 , H04L27/00 , H04L27/233 , H04J3/06
CPC分类号： H04B1/7085 , H04B1/707 , H04B1/7117 , H04L27/0014 , H04L27/2332 , H04L2027/0053 , H04L2027/0055 , H04L2027/0069 , H04L2027/0081
摘要： A reciever for receiving a CDMA communication signal that is wirelessly transmitted includes a system for correcting phase errors in an information signal which has been transmitted. The correction system comprises circuitry for generating a mixing signal and for combining the mixing signal with said information signal to produce a correction signal. An analyzer analyzes the phase of said correction signal and generates an error signal based on the deviation of the analyzed phase from a reference phase. A bandwidth controller which recursively adjusts the phase of the correction signal such that the phase of said correction signal is substantially equal to said reference phase. The bandwidth controller then selects a bandwidth within an adjustable range based on the correction signal, estimates an offset by interrogating the error signal, and modifies said correction signal by the offset.
摘要翻译：用于接收无线发送的CDMA通信信号的接收机包括用于校正已发送的信息信号中的相位误差的系统。校正系统包括用于产生混合信号并将混合信号与所述信息信号组合以产生校正信号的电路。分析器分析所述校正信号的相位，并且基于分析的相位与参考相位的偏差产生误差信号。带宽控制器，递归地调整校正信号的相位，使得所述校正信号的相位基本上等于所述参考相位。然后，带宽控制器基于校正信号选择可调整范围内的带宽，通过询问误差信号来估计偏移量，并通过偏移来修改所述校正信号。

25. 发明授权

US06574265B2 CDMA communication system using an antenna array 有权
公开(公告)号：US06574265B2
公开(公告)日：2003-06-03
申请号：US10068659
申请日：2002-02-06
申请人： David K. Mesecher
发明人： David K. Mesecher
IPC分类号： H04B169
CPC分类号： H04B1/712 , H04B7/0613 , H04B7/0615 , H04B7/0619 , H04B7/0634 , H04B7/0678 , H04B7/0845 , H04B7/0854 , H04B7/0857 , H04B7/0891 , H04B2201/70701 , H04J13/0003
摘要： The invention provides for transmission and reception of a data signal using a plurality of transmitting antennas. Each antenna transmits a different reference signal having a pseudo random chip code sequence. A receiver filters each transmitted reference signal using that reference signal's chip code. The filtered reference signals are weighted and combined. Each reference signal's weight is adaptively adjusted in part on a signal quality of the combined signal. A data signal is transmitted such that different spread spectrum versions of the data signal are transmitted from each transmitting antenna. Each version having a different chip code identifier. Upon reception, each version is filtered with its associated chip code. The filtered versions are weighted in accordance with the adjusted weights associated with the reference signal of the respective antenna.

26. 发明授权

US06483868B2 Processing for improved performance and reduced pilot 有权
公开(公告)号：US06483868B2
公开(公告)日：2002-11-19
申请号：US10008411
申请日：2001-11-13
申请人： Fatih M. Özlütürk , David K. Mesecher , Alexander M. Jacques
发明人： Fatih M. Özlütürk , David K. Mesecher , Alexander M. Jacques
IPC分类号： H04L2730
CPC分类号： H04B1/7085 , H04B1/30 , H04B1/707 , H04B1/70755 , H04B1/7093 , H04B1/7115 , H04B2201/70701 , H04L25/0212 , H04L27/0014 , H04L2027/0067
摘要： A digital spread spectrum communication system employing pilot-aided coherent multipath demodulation effects a substantial reduction in global-pilot and assigned-pilot overheads. The system and method uses a QPSK-modulated data signal whereby the modulated data is removed and the recovered carrier is used for channel amplitude and phase estimation. The resulting signal has no data modulation and is used as a pseudo-pilot signal. In conjunction with the pseudo-pilot signal, a multiple-input phase-locked loop is employed further eliminating errors due to carrier-offset by using a plurality of pseudo-pilot signals. A pilot signal is required to resolve absolute phase ambiguity, but at a greatly reduced magnitude.

27. 发明授权

US06366607B1 Processing for improved performance and reduced pilot 失效
标题翻译：处理改进性能和减少飞行员
公开(公告)号：US06366607B1
公开(公告)日：2002-04-02
申请号：US09078417
申请日：1998-05-14
申请人： Fatih M. Özlütürk , David K. Mesecher , Alexander M. Jacques
发明人： Fatih M. Özlütürk , David K. Mesecher , Alexander M. Jacques
IPC分类号： H04L2730
CPC分类号： H04B1/7085 , H04B1/30 , H04B1/707 , H04B1/70755 , H04B1/7093 , H04B1/7115 , H04B2201/70701 , H04L25/0212 , H04L27/0014 , H04L2027/0067
摘要： A digital spread spectrum communication system employing pilot-aided coherent multipath demodulation effects a substantial reduction in global-pilot and assigned-pilot overheads. The system and method uses a QPSK-modulated data signal whereby the modulated data is removed and the recovered carrier is used for channel amplitude and phase estimation. The resulting signal has no data modulation and is used as a pseudo-pilot signal. In conjunction with the pseudo-pilot signal, a multiple-input phase-locked loop is employed further eliminating errors due to carrier-offset by using a plurality of pseudo-pilot signals. A pilot signal is required to resolve absolute phase ambiguity, but at a greatly reduced magnitude.
摘要翻译：采用导频辅助相干多路径解调的数字扩频通信系统实际上降低了全局导频和分配的导频开销。该系统和方法使用QPSK调制的数据信号，由此去除调制数据，并将恢复的载波用于信道幅度和相位估计。所得到的信号没有数据调制，并被用作伪导频信号。结合伪导频信号，还采用多输入锁相环，通过使用多个伪导频信号来消除由载波偏移引起的误差。需要一个导频信号来解决绝对相位模糊度，但幅度大大降低。

28. 发明授权

US06055231A Continuously adjusted-bandwidth discrete-time phase-locked loop 失效
标题翻译：连续调整带宽离散时间锁相环
公开(公告)号：US06055231A
公开(公告)日：2000-04-25
申请号：US871109
申请日：1997-06-09
申请人： David K. Mesecher , Rui Yang , Ramon Cerda
发明人： David K. Mesecher , Rui Yang , Ramon Cerda
IPC分类号： H04L27/22 , H04B1/707 , H04B1/7085 , H04B1/7117 , H04B7/216 , H04L27/00 , H04L27/233 , H04J3/06
CPC分类号： H04B1/7085 , H04B1/707 , H04L27/0014 , H04L27/2332 , H04B1/7117 , H04L2027/0053 , H04L2027/0055 , H04L2027/0069 , H04L2027/0081
摘要： A continuously adjusted bandwidth phase-locked loop is used by a B-CDMA.TM. receiver to correct for any deviation, or offset, that may exist between the received radio frequency (RF) carrier signal and the frequency of the first stage LO that converts the received RF carrier signal to an intermediate frequency (IF). The PLL in the receiver includes a filter with an adjustable bandwidth. A wider bandwidth is used during initial acquisition of the received signal. After the PLL has acquired the received carrier signal using the wider bandwidth, the bandwidth of the filter is gradually narrowed to provide a low steady-state error.
摘要翻译： B-CDMA TM接收机使用连续调整的带宽锁相环来校正可能存在于所接收的射频（RF）载波信号和第一级LO的频率之间的任何偏差或偏移，接收RF载波信号到中频（IF）。接收机中的PLL包括具有可调节带宽的滤波器。在接收信号的初始采集期间使用更宽的带宽。在PLL利用更宽带宽获取接收到的载波信号之后，滤波器的带宽逐渐变窄，提供低稳态误差。

29. 发明授权

US08582625B2 Receiver for producing phase corrected signals 失效
标题翻译：用于产生相位校正信号的接收器
公开(公告)号：US08582625B2
公开(公告)日：2013-11-12
申请号：US13594447
申请日：2012-08-24
申请人： Fatih M. Ozluturk , David K. Mesecher , Alexander M. Jacques
发明人： Fatih M. Ozluturk , David K. Mesecher , Alexander M. Jacques
IPC分类号： H04B1/00
CPC分类号： H04B1/7085 , H04B1/30 , H04B1/707 , H04B1/70755 , H04B1/7093 , H04B1/7115 , H04B2201/70701 , H04L25/0212 , H04L27/0014 , H04L2027/0067
摘要： A method for receiving at least one of a plurality of channels in a communication signal includes receiving a spread spectrum communication signal, demodulating the spread spectrum communication signal using a rake receiver and a pseudo-noise pilot signal for a selected channel, despreading the demodulated signal of a selected channel, performing a QPSK hard decision in association with a complex conjugate of the despread signal to produce a correction signal, and mixing the correction signal to a rake receiver output to remove relative phase error without an absolute phase reference, to produce a corrected signal.
摘要翻译：一种用于在通信信号中接收多个信道中的至少一个的方法包括：接收扩展频谱通信信号，使用瑞克接收机对所述扩频通信信号进行解调，以及对所选择的信道解调伪噪声导频信号，解扩解调信号与所述解扩展信号的复共轭相关联地执行QPSK硬判决以产生校正信号，并将所述校正信号混合到瑞克接收机输出以消除相对相位误差而不进行绝对相位参考，以产生校正信号。

30. 发明授权

US08417207B2 High-performance cellular telephone receiver 有权
标题翻译：高性能手机接收机
公开(公告)号：US08417207B2
公开(公告)日：2013-04-09
申请号：US13456387
申请日：2012-04-26
申请人： David K. Mesecher
发明人： David K. Mesecher
IPC分类号： H04B1/10
CPC分类号： H04B7/086 , H04L25/0204 , H04L25/0226 , H04L25/03343 , H04L2025/03426 , H04L2025/03783
摘要： A method includes: receiving a reference signal on an array of antenna elements; using a received reference signal to find optimal weighting of the antenna elements to point a beam pattern of the antenna elements in the direction of a reference signal, thereby providing gain in the direction of the reference signal and attenuation in all other directions; adjusting a width of the beam pattern to cover an area of interest; acquiring and tracking interferers in the area of interest; reconstructing a component of interference from each of the interferers; and using the reconstructed component of interference to adaptively cancel interference from the interferers.
摘要翻译：一种方法包括：在天线元件阵列上接收参考信号; 使用接收到的参考信号来找到天线元件的最佳加权，以便在参考信号的方向上指向天线元件的波束图案，从而在所有其它方向上提供参考信号的方向和衰减的增益; 调整光束图案的宽度以覆盖感兴趣的区域; 获取和跟踪感兴趣领域的干扰者; 重构来自每个干扰源的干扰分量; 并且使用重构的干扰分量来自适应地消除来自干扰源的干扰。

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