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1. 发明授权

US08614994B2 Method and system for implementing multiple timing domains for primary and secondary synchronization detection in EUTRA/LTE 有权
标题翻译：用于在EUTRA / LTE中实现主要和次要同步检测的多个定时域的方法和系统
公开(公告)号：US08614994B2
公开(公告)日：2013-12-24
申请号：US12500575
申请日：2009-07-09
申请人： Francis Swarts , Mark Kent
发明人： Francis Swarts , Mark Kent
IPC分类号： H04J3/00
CPC分类号： H04W56/001 , H04J11/0069 , H04L27/2655 , H04L27/2662 , H04L27/2671 , H04L27/2675
摘要： A mobile device receives a signal, from a base station, comprising a primary synchronization sequence (PSS) and a secondary synchronization sequence (SSS). The mobile device utilizes two different sampling rates to perform the PSS synchronization and the SSS detection individually. For example, the mobile device synchronizes to the received PSS at a first sampling rate such as 0.96 MHz, which is determined based on the PSS transmission rate and/or the length of the received PSS. The mobile device detects the received SSS at a second sampling rate such as 1.92 MHz, which equals to the sampling rate for an analog-to-digital conversion at the mobile device. The received PSS and associated symbol timing are detected through the PSS synchronization to support the SSS detection. The detected SSS is used to acquire cell-specific parameters such as cell ID. The acquired cell-specific parameters ensure proper communications between the mobile device and the base station.
摘要翻译：移动设备从基站接收包括主同步序列（PSS）和辅同步序列（SSS）的信号。移动设备利用两种不同的采样率来分别执行PSS同步和SSS检测。例如，移动设备以基于PSS传输速率和/或所接收的PSS的长度确定的第一采样率（例如0.96MHz）与所接收的PSS同步。移动设备以诸如1.92MHz的第二采样率来检测接收的SSS，其等于在移动设备处的模数转换的采样率。通过PSS同步检测接收的PSS和相关的符号定时，以支持SSS检测。检测到的SSS用于获取诸如小区ID的小区特定参数。所获取的小区特定参数确保移动设备和基站之间的正确通信。

2. 发明授权

US08401123B2 Method and system for increasing the accuracy of frequency offset estimation in multiple frequency hypothesis testing in an E-UTRA/LTE UE receiver 有权
标题翻译：用于提高E-UTRA / LTE UE接收机多频率假设检验中频偏估计精度的方法和系统
公开(公告)号：US08401123B2
公开(公告)日：2013-03-19
申请号：US12510901
申请日：2009-07-28
申请人： Francis Swarts , Mark Kent
发明人： Francis Swarts , Mark Kent
IPC分类号： H04L27/06
CPC分类号： H04L27/2657 , H04J11/0086 , H04L27/2662 , H04L27/2675
摘要： A mobile device receives a radio frequency (RF) signal comprising a primary synchronization sequence (PSS) and a secondary synchronization sequence (SSS). The mobile device performs multiple frequency hypothesis (MFH) testing via multiple MFH branches. A PSS correlation process is performed for each MFH branch. Frequency offset for receiving data is estimated using resulting correlation data. A desired offset is placed in each MFH branch. A baseband signal is frequency offset per MFH branch according to the desired frequency offset before the PSS correlation process. A received PSS is detected based on a maximum PSS correlation over the entire set of MFH branches. A frequency offset is estimated for the MFH branch associated with the detected PSS by combining an associated residual frequency with a corresponding desired offset. The frequency offset estimate is used for baseband signal processing and/or adjusting a reference oscillator frequency at the mobile device.
摘要翻译：移动设备接收包括主同步序列（PSS）和辅同步序列（SSS）的射频（RF）信号。移动设备通过多个MFH分支执行多频率假设（MFH）测试。对每个MFH分支执行PSS相关处理。使用所得相关数据估计接收数据的频率偏移。每个MFH分支中都放置一个所需的偏移量。根据PSS相关处理之前的期望频率偏移，基带信号是每MFH分支的频偏。基于整个MFH分支集合上的最大PSS相关性来检测所接收的PSS。通过将相关联的剩余频率与相应的期望偏移相组合来估计与检测到的PSS相关联的MFH分支的频率偏移。频移估计用于基带信号处理和/或调整移动装置处的基准振荡器频率。

3. 发明授权

US07680177B2 Adaptive unbiased least square (LS) algorithm for mitigating interference for CDMA down link and other applications 有权
标题翻译：用于减轻CDMA下行链路和其他应用的干扰的自适应无偏最小二乘法（LS）算法
公开(公告)号：US07680177B2
公开(公告)日：2010-03-16
申请号：US11510398
申请日：2006-08-25
申请人： Ning Kong , Francis Swarts , Michiel Petrus Lotter , Nelson R. Sollenberger , Mark Kent
发明人： Ning Kong , Francis Swarts , Michiel Petrus Lotter , Nelson R. Sollenberger , Mark Kent
IPC分类号： H04B1/707 , H04B7/02 , H04L1/00
CPC分类号： H04B1/712 , H04B1/71055
摘要： A multipath wireless communication is processed to recover a transmitted data signal without performing a direct matrix inversion (DMI). First, the multipath wireless communication is received. Then HHH and HHH values associated with the multipath wireless communication are determined. Weights based on HHH and HHH associated with the received data signal may then be determined and used to recover the transmitted data signal from the received multipath wireless communication.
摘要翻译：处理多径无线通信以恢复发送的数据信号，而不执行直接矩阵求逆（DMI）。首先，接收多径无线通信。然后确定与多径无线通信相关联的HHH和HHH值。然后可以确定与所接收的数据信号相关联的基于HHH和HHH的权重并用于从所接收的多路径无线通信中恢复发送的数据信号。

4. 发明授权

US08917704B2 Method and system for automatically rescaling an accumulation buffer in synchronization systems 有权
标题翻译：在同步系统中自动重新调整累加缓冲区的方法和系统
公开(公告)号：US08917704B2
公开(公告)日：2014-12-23
申请号：US12768415
申请日：2010-04-27
申请人： Francis Swarts , Mark Kent
发明人： Francis Swarts , Mark Kent
IPC分类号： H04J3/00 , H04L27/26 , H04L7/04 , H04L5/00
CPC分类号： H04L7/042 , H04L5/0048 , H04L27/2662 , H04L27/2668
摘要： A mobile device accumulates energy associated with each of successive PSS transmissions received from a base station. Accumulated energy values may be rescaled by a same number of bits whenever a buffer overflow condition occurs within the accumulation buffer. The mobile device may detect a correct PSS timing hypothesis utilizing the rescaled accumulated energy values within the accumulation buffer. A significant bit such as, for example, the most significant bit (MSB) or one of lesser significant bits, of each of the accumulated energy values may be monitored during the energy accumulation process to detect a buffer overflow condition. The mobile device may determine number of bits for rescaling or right shift each of the accumulated energy values in response to the detected buffer overflow condition. The resulting shifted accumulated energy values may be utilized for PSS detection. Either an integrating or filtering method is utilized during the energy accumulation process.
摘要翻译：移动设备累积与从基站接收的每个连续PSS传输相关联的能量。每当缓冲区溢出条件发生在累加缓冲区内时，累加的能量值可以被相同数量的位重新定标。移动设备可以使用累积缓冲器内的重新标定的累积能量值来检测正确的PSS定时假设。可以在能量累积过程期间监视每个累积能量值的诸如例如最高有效位（MSB）或较低有效位之一的有效位以检测缓冲器溢出状况。响应于检测到的缓冲器溢出条件，移动设备可以确定用于重新缩放的位数或者对每个累积的能量值进行右移。所得到的移位累积能量值可用于PSS检测。在能量积累过程中使用积分或滤波方法。

5. 发明授权

US08583716B2 Method and system for efficient full resolution correlation 有权
标题翻译：高效全分辨率相关的方法和系统
公开(公告)号：US08583716B2
公开(公告)日：2013-11-12
申请号：US11965300
申请日：2007-12-27
申请人： Francis Swarts , Mark Kent
发明人： Francis Swarts , Mark Kent
IPC分类号： G06F17/10
CPC分类号： G06F17/15 , H04B2001/71563
摘要： Aspects of a method and system for efficient full resolution correlation may include correlating a first signal with a second signal at a rate corresponding to a first discrete signal, wherein each sample of the first signal may be generated by summing a plurality of consecutive samples from the first discrete signal, and the second signal may be generated by summing the plurality of consecutive samples from a second discrete signal. The correlating may be performed by a matched filter and/or a correlator. The first signal comprising N samples may be generated by summing L consecutive samples for each of the N samples from the first discrete signal comprising N*L samples. The second signal comprising N samples may be generated by summing L consecutive samples for each of the N samples from the second discrete signal comprising N*L samples. The first signal and the second signal may be correlated by multiplying the N samples of the first signal with the N samples of the second signal in N multipliers and summing a plurality of outputs of the multipliers. A maximum of the correlating may be determined to achieve synchronization between the first discrete signal and the second discrete signal.
摘要翻译：用于有效全分辨率相关的方法和系统的方面可以包括以对应于第一离散信号的速率将第一信号与第二信号相关联，其中第一信号的每个采样可以通过将来自第一离散信号，并且第二信号可以通过从第二离散信号求和多个连续采样来产生。相关可以由匹配滤波器和/或相关器执行。包括N个样本的第一信号可以通过从包括N * L个样本的第一离散信号中对每个N个采样的L个连续样本求和来生成。包括N个样本的第二信号可以通过从包括N * L个样本的第二离散信号中对N个样本中的每一个求和L个连续样本来生成。第一信号和第二信号可以通过将第一信号的N个采样与N个乘法器中的第二信号的N个采样相乘并对乘法器的多个输出求和来相关。可以确定相关的最大值以实现第一离散信号和第二离散信号之间的同步。

6. 发明授权

US08411729B2 Method and apparatus for new cell identification in a WCDMA network with a given neighbor set 有权
标题翻译：具有给定邻居集的WCDMA网络中新小区识别的方法和装置
公开(公告)号：US08411729B2
公开(公告)日：2013-04-02
申请号：US13310045
申请日：2011-12-02
申请人： Mark Kent , Francis Swarts , Uri Landau
发明人： Mark Kent , Francis Swarts , Uri Landau
IPC分类号： H04L7/00
CPC分类号： H04B1/7083 , H04B1/70735 , H04B1/70752 , H04B2201/70702
摘要： In a WCDMA network, a communication system may include a baseband processor that enables determination of a primary synchronization position and a plurality of scrambling codes based on received configuration information from at least one base station. The baseband processor may also determine a slot boundary in at least one signal received from the at least one base station based on the determined primary synchronization position. The baseband processor may concurrently apply segments of the plurality of scrambling codes to the received at least one signal. The segments of the plurality of scrambling codes are generated from a plurality of time shifted versions of one of the plurality of scrambling codes. The system may also include a multipath detector that enables unscrambling of the received at least one signal based on the determined slot boundary and at least a portion of the one or more scrambling codes.
摘要翻译：在WCDMA网络中，通信系统可以包括：基带处理器，其能够基于来自至少一个基站的接收到的配置信息来确定主同步位置和多个扰码。基带处理器还可以基于所确定的主同步位置来确定从至少一个基站接收的至少一个信号中的时隙边界。基带处理器可以将多个扰码中的段同时应用于所接收的至少一个信号。多个扰频码的段是从多个扰码之一的多个时移版本中产生的。该系统还可以包括多径检测器，其能够基于所确定的时隙边界和所述一个或多个扰码的至少一部分来对所接收的至少一个信号进行解扰。

7. 发明授权

US08326251B2 Method and system for estimating a receiver frequency offset in a communication system 有权
标题翻译：用于估计通信系统中的接收机频率偏移的方法和系统
公开(公告)号：US08326251B2
公开(公告)日：2012-12-04
申请号：US12766752
申请日：2010-04-23
申请人： Francis Swarts , Mark Kent
发明人： Francis Swarts , Mark Kent
IPC分类号： H04B1/10
CPC分类号： H04W56/00 , H04W56/0035
摘要： A mobile device receives a radio frequency (RF) signal, comprising a physical signal such as a primary synchronization signal (PSS), from a serving base station. Two successive samples derived from the received physical signal such as a PSS are selected to generate a single phasor. A receiver frequency offset for the received RF signal is estimated utilizing the generated single phasor. A correlation process is performed to detect the received PSS. An angular increment in the first quadrant is calculated utilizing the generated single phasor. An actual angular increment subject to the receiver frequency offset is calculated based on the angular increment in the first quadrant and signs of real and imaginary components of the generated single phasor. The receiver frequency offset is determined based on the calculated actual angular increment and is utilized to adjust a reference or local oscillator frequency of the mobile device.
摘要翻译：移动设备从服务基站接收包括诸如主同步信号（PSS）的物理信号的射频（RF）信号。从接收到的物理信号（如PSS）导出的两个连续样本被选择以产生单个相量。使用所生成的单个相量来估计接收的RF信号的接收机频率偏移。执行相关处理以检测所接收的PSS。使用所生成的单个相量计算第一象限中的角度增量。基于接收机频偏的实际角增量基于第一象限中的角增量和生成的单相量的实部和虚部的符号来计算。基于计算出的实际角度增量确定接收机频率偏移，并且用于调整移动设备的参考或本地振荡器频率。

8. 发明授权

US08135096B2 Method and system for the extension of frequency offset estimation range based on correlation of complex sequences 有权
标题翻译：基于复杂序列相关性的频偏估计范围扩展的方法和系统
公开(公告)号：US08135096B2
公开(公告)日：2012-03-13
申请号：US12251752
申请日：2008-10-15
申请人： Francis Swarts , Mark Kent
发明人： Francis Swarts , Mark Kent
IPC分类号： H03D1/00
CPC分类号： H04L27/0014 , H04L2027/0067
摘要： Aspects of a method and system for the extension of frequency offset estimation range based on correlation of complex sequences may include partitioning each of a received sample sequence and a local replica sample sequence into three or more similar length contiguous sample sub-sequences. For each of the three or more similar length contiguous sample sub-sequences, a correlation coefficient may be determined between corresponding sample sub-sequences of the partitioned received sample sequence and the local replica sample sequence. A plurality of phase differences may be determined based on adjacent ones of the determined correlation coefficients, and the determined plurality of phase differences may be averaged to generate a phase increment estimate. The communication system may be compliant with a wireless standard, comprising UMTS EUTRA (LTE), WiMAX (IEEE 802.16), and/or WLAN (IEEE 802.11).
摘要翻译：基于复杂序列的相关性的用于扩展频率偏移估计范围的方法和系统的方面可以包括将接收到的采样序列和局部复制样本序列中的每一个分成三个或更多个相似长度的连续样本子序列。对于三个或更多个相似长度的连续样本子序列中的每一个，可以在分割的接收样本序列的对应样本子序列和局部复本样本序列之间确定相关系数。可以基于确定的相关系数中的相邻的相关系数来确定多个相位差，并且可以对确定的多个相位差进行平均以产生相位增量估计。通信系统可以符合包括UMTS EUTRA（LTE），WiMAX（IEEE 802.16）和/或WLAN（IEEE 802.11）的无线标准。

9. 发明申请

US20110243105A1 METHOD AND SYSTEM FOR AUTOMATICALLY RESCALING AN ACCUMULATION BUFFER IN SYNCHRONIZATION SYSTEMS 有权
标题翻译：在同步系统中自动调整累积缓冲器的方法和系统
公开(公告)号：US20110243105A1
公开(公告)日：2011-10-06
申请号：US12768415
申请日：2010-04-27
申请人： Francis Swarts , Mark Kent
发明人： Francis Swarts , Mark Kent
IPC分类号： H04W56/00 , H04J3/00
CPC分类号： H04L7/042 , H04L5/0048 , H04L27/2662 , H04L27/2668
摘要： A mobile device accumulates energy associated with each of successive PSS transmissions received from a base station. Accumulated energy values may be rescaled by a same number of bits whenever a buffer overflow condition occurs within the accumulation buffer. The mobile device may detect a correct PSS timing hypothesis utilizing the rescaled accumulated energy values within the accumulation buffer. A significant bit such as, for example, the most significant bit (MSB) or one of lesser significant bits, of each of the accumulated energy values may be monitored during the energy accumulation process to detect a buffer overflow condition. The mobile device may determine number of bits for rescaling or right shift each of the accumulated energy values in response to the detected buffer overflow condition. The resulting shifted accumulated energy values may be utilized for PSS detection. Either an integrating or filtering method is utilized during the energy accumulation process.
摘要翻译：移动设备累积与从基站接收的每个连续PSS传输相关联的能量。每当缓冲区溢出条件发生在累加缓冲区内时，累加的能量值可以被相同数量的位重新定标。移动设备可以使用累积缓冲器内的重新标定的累积能量值来检测正确的PSS定时假设。可以在能量累积过程期间监视每个累积能量值的诸如例如最高有效位（MSB）或较低有效位之一的有效位以检测缓冲器溢出状况。响应于检测到的缓冲器溢出条件，移动设备可以确定用于重新缩放的位数或者对每个累积的能量值进行右移。所得到的移位累积能量值可用于PSS检测。在能量积累过程中使用积分或滤波方法。

10. 发明申请

US20090213724A1 METHOD AND SYSTEM FOR I/Q BRANCH EQUALIZATION IN OFDM SYSTEMS 有权
标题翻译： OFDM系统中I / Q分支均衡的方法和系统
公开(公告)号：US20090213724A1
公开(公告)日：2009-08-27
申请号：US12251774
申请日：2008-10-15
申请人： Francis Swarts , Mark Kent , Theodoros Georgantas
发明人： Francis Swarts , Mark Kent , Theodoros Georgantas
IPC分类号： H04J11/00
CPC分类号： H04L27/3863 , H04L25/03159 , H04L27/2601 , H04L27/3872
摘要： Aspects of a method and system for I/Q branch equalization in OFDM systems may include determining a transfer function mismatch between an in-phase processing branch, and/or a quadrature processing branch in an OFDM receiver. The determined transfer function mismatch may be compensated for, by applying equalization after a fast Fourier transform (FFT) in an in-phase processing branch and/or a quadrature processing branch. The OFDM system may be compliant with, for example, UMTS LTE (EUTRA), WiMAX (IEEE 802.16), DVB-H, and WLAN (IEEE 802.11). A transfer function may be measured for an in-phase branch filter and/or quadrature branch filter to determine the transfer function mismatch. The transfer function mismatch may be compensated for, in frequency domain by the equalizer. The transfer function mismatch may comprise magnitude and/or phase response mismatch, wherein the magnitude and/or phase response mismatch may be a function of frequency.
摘要翻译： OFDM系统中用于I / Q分支均衡的方法和系统的方面可以包括确定OFDM接收机中的同相处理分支和/或正交处理分支之间的传递函数失配。可以通过在同相处理分支和/或正交处理分支中的快速傅立叶变换（FFT）之后应用均衡来补偿确定的传递函数失配。 OFDM系统可以符合例如UMTS LTE（EUTRA），WiMAX（IEEE 802.16），DVB-H和WLAN（IEEE 802.11）。可以对同相分支滤波器和/或正交分支滤波器测量传递函数，以确定传递函数失配。可以通过均衡器在频域中补偿传递函数失配。传递函数失配可以包括幅度和/或相位响应不匹配，其中幅度和/或相位响应失配可以是频率的函数。

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