公开(公告)号：US07406139B2

公开(公告)日：2008-07-29

申请号：US10786258

申请日：2004-02-25

申请人： Baoguo Yang ,  Nelson Sollenberger

发明人： Baoguo Yang ,  Nelson Sollenberger

IPC分类号： H03D1/00 ,  H04L27/06

CPC分类号： H04L1/0059 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0065 ,  H04L1/0069 ,  H04L1/0071 ,  H04L1/1816 ,  H04L1/1819 ,  H04L1/1829 ,  H04L1/1835 ,  H04L1/1845 ,  H04L1/203 ,  H04L1/208 ,  H04L25/03171 ,  H04L25/03318 ,  H04L25/067 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/2017 ,  H04L27/2067 ,  H04L27/22

摘要： The modulation format of a data block (frame) received from a servicing base station by a wireless terminal in a cellular wireless communication system is identified. This involves first receiving several radio frequency (RF) bursts of one data block (frame) from the servicing base station. The RF burst carries a number of modulated symbols. The training sequence is extracted from the RF burst and is made of a number of modulated symbols. The training sequences are first processed assuming a first modulation format to produce a first accumulated channel energy. Then, the training sequences are processed assuming a second modulation format to produce a second accumulated channel energy. The first and second accumulated channel energies are compared to determine which accumulated channel energy is greater. The modulation format of the data block is identified as the modulation format corresponding to the greater accumulated channel energy.

摘要翻译： 识别由蜂窝无线通信系统中的无线终端从服务基站接收的数据块（帧）的调制格式。 这涉及首先从服务基站接收一个数据块（帧）的几个射频（RF）突发。 RF突发携带多个调制符号。 从RF突发中提取训练序列，并且由多个调制符号组成。 首先按照第一调制格式对训练序列进行处理，以产生第一累积的信道能量。 然后，采用第二调制格式处理训练序列，以产生第二累积的信道能量。 比较第一和第二累积通道能量以确定哪个累积通道能量较大。 数据块的调制格式被识别为对应于较大的累积通道能量的调制格式。

公开(公告)号：US20060198434A1

公开(公告)日：2006-09-07

申请号：US11271692

申请日：2005-11-10

申请人： Yue Chen ,  Arkady Molev-Shteiman ,  Aric Heiman ,  Nelson Sollenberger ,  Iluaiyu (Ilanks) Zeng ,  Baoguo Yang

发明人： Yue Chen ,  Arkady Molev-Shteiman ,  Aric Heiman ,  Nelson Sollenberger ,  Iluaiyu (Ilanks) Zeng ,  Baoguo Yang

IPC分类号： H03K5/159 ,  H03H7/30 ,  H04B1/10

CPC分类号： H04L25/03171 ,  H04L25/03133

摘要： The present invention provides a multi-branch equalizer processing module operable to cancel interference associated with received radio frequency (RF) burst(s). This multi-branch equalizer processing module includes both a first equalizer processing branch and a second equalizer processing branch. The first equalizer processing branch is operable to be trained based upon known training sequences and equalize the received RF burst. This results in soft samples or decisions which in turn may be converted to data bits. The soft samples are processed with a de-interleaver and channel decoder, where the combination is operable to produce a decoded frame of data bits from the soft samples. A re-encoder may re-encode the decoded frame to produce re-encoded or at least partially re-encoded data bits. An interleaver then processes the at least partially re-encoded data bits to produce and at least partially re-encoded burst. The second equalizer processing branch uses the at least partially re-encoded data bits to train linear equalizer(s) within-the second equalizer processing branch. A buffer may initially store the received RF burst(s), which are retrieved and equalized by the second equalizer processing branch once the linear equalizer(s) are trained. This results in alternate soft samples or decisions which in turn may be converted to alternate data bits. The alternate soft samples are processed with the de-interleaver and channel decoder, where the combination is operable to produce an alternate decoded frame of data bits from the alternate soft samples. This allows interfering signals to be cancelled and more accurate processing of the received RF bursts to occur.

公开(公告)号：US07826493B2

公开(公告)日：2010-11-02

申请号：US10228165

申请日：2002-08-26

申请人： Li Fung Chang ,  Nelson Sollenberger ,  Baoguo Yang

发明人： Li Fung Chang ,  Nelson Sollenberger ,  Baoguo Yang

IPC分类号： H04J3/06

CPC分类号： H04B1/7075 ,  H04B1/70735 ,  H04B1/708 ,  H04L2027/0046

摘要： Methods and apparatus for acquiring and verifying a code used by a base station. Acquisition time is reduced and circuitry simplified by performing Phase I and Phase II acquisitions in series, but in parallel with Phase III acquisition and verification, which are done in series. Phase III code acquisition is done by despreading the input signal using each of the possible codes in a code group. An estimation of the frequency offset between the base station and the terminal's local reference is used to correct the phase of the despread signals, which are coherently and non-coherently integrated. The largest accumulated value corresponds to the code used by the base station. The code is verified by despreading the received signal, applying a frequency correction, and demodulating. The demodulated output is a series of symbols, and a count of these symbols verifies the acquired code.

摘要翻译： 用于获取和验证基站使用的代码的方法和装置。 通过串联完成第一阶段和第二阶段的并购，但是与第三阶段采集和验证并行完成了采集时间，简化了电路。 通过使用代码组中的每个可能代码解扩输入信号来完成III期代码获取。 使用基站和终端本地参考之间的频率偏移的估计来校正相干和非相干积分的解扩信号的相位。 最大的累积值对应于基站使用的代码。 通过解扩接收信号，应用频率校正和解调来验证码。 解调输出是一系列符号，并且这些符号的计数验证所获取的代码。

公开(公告)号：US20050084043A1

公开(公告)日：2005-04-21

申请号：US10862715

申请日：2004-06-07

申请人： Baoguo Yang ,  Nelson Sollenberger

发明人： Baoguo Yang ,  Nelson Sollenberger

IPC分类号： H04L25/06 ,  H04L27/18 ,  H04L27/22 ,  H04L25/08

CPC分类号： H04L27/22 ,  H04L25/062 ,  H04L27/18

摘要： A method to perform DC compensation on a Radio Frequency (RF) burst transmitted between a servicing base station and a wireless terminal in a cellular wireless communication system that first receives the RF burst modulated according to either a first or second modulation format. Samples from the RF burst, taken from the training sequence, are produced and averaged to produce a DC offset estimate. The DC offset estimate is then subtracted from each of the samples. The modulation format of RF burst may then be identified from the samples. Depending on the identified modulation format, the DC offset estimate may be re-added to the samples when a particular modulation format is identified as the modulation format of the RF burst. This decision is made based on how well various components within the wireless terminal perform DC offset compensation.

摘要翻译： 在首先接收根据第一或第二调制格式调制的RF突发的蜂窝无线通信系统中在服务基站和无线终端之间传输的射频（RF）突发上执行DC补偿的方法。 从训练序列获取来自RF突发的样本，并进行平均以产生DC偏移估计。 然后从每个样本中减去DC偏移估计。 然后可以从样本中识别RF突发的调制格式。 取决于所识别的调制格式，当将特定调制格式识别为RF突发的调制格式时，DC偏移估计可被重新添加到样本。 该决定基于无线终端内的各种组件执行DC偏移补偿的程度。

公开(公告)号：US20050009493A1

公开(公告)日：2005-01-13

申请号：US10811579

申请日：2004-03-29

申请人： Baoguo Yang ,  Nelson Sollenberger

发明人： Baoguo Yang ,  Nelson Sollenberger

IPC分类号： H03D3/00 ,  H04B1/26 ,  H04B1/10 ,  H04B15/00

CPC分类号： H03D3/008

摘要： A wireless receiver includes a local oscillator, a mixer, a band pass filter, a DC offset determination module, a DC offset correction module, a subtraction module, and a down converter. The local oscillator produces a local oscillation that a mixer uses to down convert the RF information signal to produce a Very Low Intermediate Frequency (VLIF) information signal at a VLIF and having a DC offset. The band pass filter band pass filters the VLIF information signal. The DC offset determination module produces a DC offset indication for the VLIF information signal. The DC offset correction module generates a DC offset correction based upon the DC offset indication. The subtraction module subtracts the DC offset correction from the VLIF information signal to substantially remove a DC offset of the post-filtered VLIF information signal. The down converter down converts the VLIF information signal to a baseband information signal. In an alternate embodiment, the VLIF information signal is down converted to baseband prior to removal of the DC offset component, which then resides at −VLIF frequency.

摘要翻译： 无线接收机包括本机振荡器，混频器，带通滤波器，DC偏移确定模块，DC偏移校正模块，减法模块和下变频器。 本地振荡器产生本地振荡，混频器用于降低RF信号信号的转换，以在VLIF产生非常低的中频（VLIF）信息信号并具有DC偏移。 带通滤波器带通滤波VLIF信息信号。 DC偏移确定模块产生用于VLIF信息信号的DC偏移指示。 DC偏移校正模块基于DC偏移指示产生DC偏移校正。 减法模块从VLIF信息信号中减去DC偏移校正，以基本上去除后滤波的VLIF信息信号的DC偏移。 下变频器将VLIF信息信号转换为基带信息信号。 在替代实施例中，在去除DC偏移分量之前，VLIF信息信号被下变频为基带，然后DC偏移分量驻留在-VLIF频率处。

公开(公告)号：US20050085237A1

公开(公告)日：2005-04-21

申请号：US10862714

申请日：2004-06-07

申请人： Baoguo Yang ,  Nelson Sollenberger

发明人： Baoguo Yang ,  Nelson Sollenberger

IPC分类号： H03H17/02 ,  H04B1/10 ,  H04Q7/20

CPC分类号： H04B1/1027 ,  H03H17/0286 ,  H03H17/0294

摘要： A method to perform adaptive channel filtering on a Radio Frequency (RF) bursts in a cellular wireless communication system. This method first filters an input signal with a first stage filter having a first bandwidth to produce a first stage output signal. Then the first stage output signal is filtered with a second stage filter having a second bandwidth narrower than that of the first stage filter to produce a multi-stage output signal. A comparison between first stage performance measurements and multi-stage performance measurements determine the mode of operation of the adaptive multistage filter. A first mode of operation, selected when the first stage performance measurement compares favorably with the second stage performance measurement, selects the output of the first stage filter as the output of the multi-stage filter. Otherwise, a second mode of operation selects the output of the second stage filter as the output of the multi-stage filter.

摘要翻译： 一种在蜂窝无线通信系统中对射频（RF）突发执行自适应信道滤波的方法。 该方法首先用具有第一带宽的第一级滤波器对输入信号进行滤波以产生第一级输出信号。 然后第一级输出信号用具有比第一级滤波器窄的第二带宽的第二级滤波器滤波，以产生多级输出信号。 第一阶段性能测量和多级性能测量之间的比较确定了自适应多级滤波器的工作模式。 当第一级性能测量与第二级性能测量相比较时选择的第一操作模式选择第一级滤波器的输出作为多级滤波器的输出。 否则，第二操作模式选择第二级滤波器的输出作为多级滤波器的输出。

公开(公告)号：US07342956B2

公开(公告)日：2008-03-11

申请号：US10749492

申请日：2003-12-31

申请人： Li Fung Chang ,  Baoguo Yang ,  Nelson Sollenberger

发明人： Li Fung Chang ,  Baoguo Yang ,  Nelson Sollenberger

IPC分类号： H04B1/38 ,  H04L5/16

CPC分类号： H04W74/006 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0057 ,  H04L1/0059 ,  H04L1/0065 ,  H04L1/0068 ,  H04L1/0071 ,  H04L1/0079 ,  H04L1/0091 ,  H04L25/03318 ,  H04L27/0012 ,  H04W28/18 ,  H04W74/0833 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1226 ,  Y02D70/23

摘要： Determining whether a first wireless terminal may transmit on an uplink to a servicing base station in a cellular wireless communication system includes first receiving a plurality of a Radio Frequency (RF) bursts at a wireless terminal from a servicing base station. These RF bursts carry a data block containing both Uplink Status Flag (USF) bits and Data bits. Data bits may or may not be intended for the receiving wireless terminal. The RF bursts are processed to produce the data block in an encoded format. This data block is then partially decoded to extract the USF bits when the data bits are not intended for the receiving wireless terminal. These USF bits determine when the receiving wireless terminal can transmit or uplink to the servicing base station. The partial decoding may be halted once the USF bits have been extracted from the received data block to reduce power consumption and processing requirements.

摘要翻译： 确定在蜂窝无线通信系统中第一无线终端是否可以在上行链路上向服务基站发送包括首先从服务基站在无线终端处接收多个射频（RF）突发。 这些RF脉冲串携带包含上行链路状态标志（USF）位和数据位的数据块。 数据位可能或可能不适用于接收无线终端。 RF脉冲串被处理以产生编码格式的数据块。 然后，当数据位不用于接收无线终端时，该数据块被部分解码以提取USF位。 这些USF位确定接收无线终端何时可以向服务基站发送或上行链路。 一旦从接收到的数据块中提取了USF位，就可以停止部分解码，以减少功耗和处理要求。

公开(公告)号：US20070184806A1

公开(公告)日：2007-08-09

申请号：US11715212

申请日：2007-03-07

申请人： Baoguo Yang ,  Nelson Sollenberger

发明人： Baoguo Yang ,  Nelson Sollenberger

IPC分类号： H04B1/10 ,  H04B1/16

CPC分类号： H04B1/1027

摘要： A method to perform adaptive channel filtering on a Radio Frequency (RF) bursts in a cellular wireless communication system. This method first filters an input signal with a first stage filter having a first bandwidth to produce a first stage output signal. Then the first stage output signal is filtered with a second stage filter having a second bandwidth narrower than that of the first stage filter to produce a multi-stage output signal. A comparison between first stage performance measurements and multi-stage performance measurements determine the mode of operation of the adaptive multistage filter. A first mode of operation, selected when the first stage performance measurement compares favorably with the second stage performance measurement, selects the output of the first stage filter as the output of the multi-stage filter. Otherwise, a second mode of operation selects the output of the second stage filter as the output of the multi-stage filter.

摘要翻译： 一种在蜂窝无线通信系统中对射频（RF）突发执行自适应信道滤波的方法。 该方法首先用具有第一带宽的第一级滤波器对输入信号进行滤波以产生第一级输出信号。 然后第一级输出信号用具有比第一级滤波器窄的第二带宽的第二级滤波器滤波，以产生多级输出信号。 第一阶段性能测量和多级性能测量之间的比较确定了自适应多级滤波器的工作模式。 当第一级性能测量与第二级性能测量相比较时选择的第一操作模式选择第一级滤波器的输出作为多级滤波器的输出。 否则，第二操作模式选择第二级滤波器的输出作为多级滤波器的输出。

公开(公告)号：US09198149B2

公开(公告)日：2015-11-24

申请号：US13432320

申请日：2012-03-28

申请人： Mark Hahm ,  Severine Catreux ,  Nelson Sollenberger

发明人： Mark Hahm ,  Severine Catreux ,  Nelson Sollenberger

IPC分类号： H04W56/00 ,  H04W36/18 ,  H03M13/37 ,  H03M13/39 ,  H04L1/00

CPC分类号： H04W56/002 ,  H03M13/3723 ,  H03M13/3905 ,  H03M13/3972 ,  H04L1/005 ,  H04W36/18

摘要： Disclosed are various embodiments involving a two-step searcher for cell discovery. Multiple scrambling codes associated with multiple neighboring cells are obtained. Slot timing is obtained for a received signal based at least in part on a detection of primary synchronization peak energy in the received signal. One of the scrambling codes for decoding the received signal is identified based at least in part on testing multiple scrambling code hypotheses in parallel during an accumulation time period of the received signal in response to obtaining the slot timing.

摘要翻译： 公开了涉及用于细胞发现的两步搜索器的各种实施例。 获得与多个相邻小区相关联的多个扰码。 至少部分地基于对接收信号中的主同步峰值能量的检测，对于接收信号获得时隙定时。 至少部分地基于在接收到的信号的累积时间段期间响应于获得时隙定时来并行测试多个扰码假设来识别用于解码接收信号的扰码之一。

公开(公告)号：US09014740B2

公开(公告)日：2015-04-21

申请号：US13481692

申请日：2012-05-25

申请人： Nelson Sollenberger ,  Wei Luo ,  Xiao-Feng Qi ,  Kaiping Li

发明人： Nelson Sollenberger ,  Wei Luo ,  Xiao-Feng Qi ,  Kaiping Li

IPC分类号： H04W56/00 ,  H04W48/16 ,  H04W88/06 ,  H04W52/02 ,  H04W76/04

CPC分类号： H04W56/0015 ,  H04W52/0216 ,  H04W76/28 ,  H04W88/06 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/144 ,  Y02D70/168 ,  Y02D70/24

摘要： A technique for time tracking helps a mobile communication device with multiple SIMs to more accurately maintain synchronization with a base station. By utilizing synchronization information from both SIMs, the technique is able to more frequently and more accurately adjust timing information for each SIM. As a result, the mobile communication device exhibits an increased ability to accurately synchronize without the need for a higher precision reference or increased power consumption.

摘要翻译： 用于时间跟踪的技术帮助具有多个SIM的移动通信设备更准确地保持与基站的同步。 通过利用来自两个SIM的同步信息，该技术能够更频繁和更准确地调整每个SIM的定时信息。 结果，移动通信设备表现出增加的准确同步的能力，而不需要更高精度的参考或增加的功耗。