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1. 发明授权

US06768768B2 Method and apparatus for step two W-CDMA searching 有权
标题翻译：用于步骤二W-CDMA搜索的方法和装置
公开(公告)号：US06768768B2
公开(公告)日：2004-07-27
申请号：US09957377
申请日：2001-09-19
申请人： Subramanya P. Rao , Sivarama Venkatesan , Gwang-Hyun Gho , Avneesh Agrawal , Daisuke Terasawa
发明人： Subramanya P. Rao , Sivarama Venkatesan , Gwang-Hyun Gho , Avneesh Agrawal , Daisuke Terasawa
IPC分类号： H04L2730
CPC分类号： H04B1/7077 , H04B1/70735 , H04B1/70752 , H04B1/7083 , H04B1/709 , H04B1/7093 , H04B2201/70701 , H04B2201/70707
摘要： Techniques for searching in asynchronous systems are disclosed. In one aspect, a plurality of codes, such as SSCs, are correlated with a received signal at a plurality of offsets to produce a code/slot energy corresponding to each code/slot boundary pair. Unique subsets of the code/slot energies are summed to produce code sequence energies, the maximum of which indicates a located code sequence and slot boundary. In another aspect, the correlation is performed by sub-correlating the received signal with a common sequence, and performing a Fast Hadamard Transform (FHT) on the results. In yet another aspect, one sub-correlator can be used to search a plurality of peaks simultaneously. Various other aspects of the invention are also presented. These aspects collectively have the benefit of circuit area and search-time efficiency which translate into reduced costs, increased standby time, increased acquisition speed, higher quality signal transmission, increased data throughput, decreased power, and improved overall system capacity.
摘要翻译：公开了在异步系统中搜索的技术。在一个方面，诸如SSC的多个代码与多个偏移处的接收信号相关，以产生对应于每个代码/时隙边界对的代码/时隙能量。代码/时隙能量的独特子集被相加以产生代码序列能量，其最大值表示定位的代码序列和时隙边界。在另一方面，通过将接收到的信号与公共序列进行子相关，并对结果进行快速哈达马（Fad Hadamard）变换（FHT）来执行相关性。在另一方面，可以使用一个子相关器同时搜索多个峰值。还提出了本发明的各种其它方面。这些方面共同具有电路面积和搜索时间效率的优点，其转化为降低的成本，增加的待机时间，增加的采集速度，更高质量的信号传输，增加的数据吞吐量，降低的功率以及改善的整体系统容量。

2. 发明授权

US07849386B2 Decoder and method for decoding a tail-biting convolutional encoded signal using Viterbi decoding scheme 失效
标题翻译：使用维特比解码方案解码尾巴卷积编码信号的解码器和方法
公开(公告)号：US07849386B2
公开(公告)日：2010-12-07
申请号：US11621958
申请日：2007-01-10
申请人： Gwang-Hyun Gho , Won-Joon Choi , Chaohuang Zeng
发明人： Gwang-Hyun Gho , Won-Joon Choi , Chaohuang Zeng
IPC分类号： H03M13/03
CPC分类号： H03M13/2996
摘要： A decoder and method for decoding a tail-biting convolutional encoded signal using Viterbi decoding scheme performs a traceback operation for a first portion of a total code block, which includes a code block of the tail-biting convolutional encoded signal and a padded block. During the traceback operation for the first portion, a particular state at a predefined position within the first portion is stored as a circular state. The circular state is used as a traceback starting state for at least one subsequent portion of the total code block to produce a decoded signal of the code block.
摘要翻译：使用维特比解码方案对尾部卷积编码信号进行解码的解码器和方法对总代码块的第一部分执行回溯操作，其包括尾部卷积编码信号的码块和填充块。在第一部分的回溯操作期间，第一部分内的预定位置处的特定状态被存储为圆形状态。循环状态用作总代码块的至少一个后续部分的回溯开始状态，以产生代码块的解码信号。

3. 发明授权

US08295380B2 Automatic gain control circuit for MIMO OFDM receiver 失效
标题翻译： MIMO OFDM接收机的自动增益控制电路
公开(公告)号：US08295380B2
公开(公告)日：2012-10-23
申请号：US12114929
申请日：2008-05-05
申请人： Mingrui Zhu , Gwang-Hyun Gho , Won-Joon Choi
发明人： Mingrui Zhu , Gwang-Hyun Gho , Won-Joon Choi
IPC分类号： H04B7/02
CPC分类号： H04L27/2647 , H03G3/3078
摘要： An automatic gain control (AGC) circuit and method for performing AGC for an orthogonal frequency-division multiplexing (OFDM) receiver measures signal power of input digital signals that are derived from incoming data frames with preambles to produce gain change signals when the signal power differs from a reference target power level. The gain of an amplifier of the OFDM receiver is changed in response to the gain change signals until a preamble of the data frames is detected for the first time. The gain of the amplifier of the OFDM receiver is further changed in response to the gain change signals, after the preamble is detected, only during periods when the preambles of the data frames are being processed by the OFDM receiver such that the gain of the amplifier is not changed during periods when other portions of the data frames are being processed by the OFDM receiver.
摘要翻译：用于对正交频分复用（OFDM）接收机执行AGC的自动增益控制（AGC）电路和方法测量输入数字信号的信号功率，该输入数字信号从具有前同步码的输入数据帧导出，以在信号功率不同时产生增益改变信号从参考目标功率水平。 OFDM接收机的放大器的增益响应于增益变化信号而改变，直到第一次检测到数据帧的前导码为止。 OFDM接收机的放大器的增益在检测到前导码之后响应于增益改变信号进一步改变，仅在OFDM接收器正在处理数据帧的前导码的时段期间，使得放大器的增益在数据帧的其他部分正在被OFDM接收机处理的期间不改变。

4. 发明申请

US20080273636A1 AUTOMATIC GAIN CONTROL CIRCUIT FOR MIMO OFDM RECEIVER 失效
标题翻译： MIMO OFDM接收机的自动增益控制电路
公开(公告)号：US20080273636A1
公开(公告)日：2008-11-06
申请号：US12114929
申请日：2008-05-05
申请人： Mingrui Zhu , Gwang-Hyun Gho , Won-Joon Choi
发明人： Mingrui Zhu , Gwang-Hyun Gho , Won-Joon Choi
IPC分类号： H04L27/08
CPC分类号： H04L27/2647 , H03G3/3078
摘要： An automatic gain control (AGC) circuit and method for performing AGC for an orthogonal frequency-division multiplexing (OFDM) receiver measures signal power of input digital signals that are derived from incoming data frames with preambles to produce gain change signals when the signal power differs from a reference target power level. The gain of an amplifier of the OFDM receiver is changed in response to the gain change signals until a preamble of the data frames is detected for the first time. The gain of the amplifier of the OFDM receiver is further changed in response to the gain change signals, after the preamble is detected, only during periods when the preambles of the data frames are being processed by the OFDM receiver such that the gain of the amplifier is not changed during periods when other portions of the data frames are being processed by the OFDM receiver.
摘要翻译：用于对正交频分复用（OFDM）接收机执行AGC的自动增益控制（AGC）电路和方法测量输入数字信号的信号功率，该输入数字信号从具有前同步码的输入数据帧导出，以在信号功率不同时产生增益改变信号从参考目标功率水平。 OFDM接收机的放大器的增益响应于增益变化信号而改变，直到第一次检测到数据帧的前导码为止。 OFDM接收机的放大器的增益在检测到前导码之后响应于增益改变信号进一步改变，仅在OFDM接收器正在处理数据帧的前导码的时段期间，使得放大器的增益在数据帧的其他部分正在被OFDM接收机处理的期间不改变。

5. 发明授权

US08050363B2 Turbo decoder and method for turbo decoding a double-binary circular recursive systematic convolutional encoded signal 有权
标题翻译： Turbo解码器和用于turbo解码双二进制循环递归系统卷积编码信号的方法
公开(公告)号：US08050363B2
公开(公告)日：2011-11-01
申请号：US12115027
申请日：2008-05-05
申请人： Gwang-Hyun Gho , Won-Joon Choi
发明人： Gwang-Hyun Gho , Won-Joon Choi
IPC分类号： H03M13/03
CPC分类号： H04L1/0041 , H04L1/005 , H04L1/0066
摘要： A Turbo decoder and method for decoding a double-binary circular recursive systematic convolutional (DBCRSC) encoded signal with unknown initial and final states executes iterations of forward and backward recursion on a payload block of the DBCRSC encoded signal and a padded block using an estimated forward state metric (FSM) and an estimated backward state metric (BSM), which are updated at one or more iterations.
摘要翻译：用于解码具有未知初始和最终状态的双二进制循环递归系统卷积（DBCRSC）编码信号的Turbo解码器和方法在DBCRSC编码信号的有效载荷块上执行正向和反向递归的迭代，并且使用估计的前向状态度量（FSM）和估计的向后状态度量（BSM），其在一个或多个迭代中被更新。

6. 发明申请

US20080273631A1 TURBO DECODER AND METHOD FOR TURBO DECODING A DOUBLE-BINARY CIRCULAR RECURSIVE SYSTEMATIC CONVOLUTIONAL ENCODED SIGNAL 有权
标题翻译：涡轮解码器和方法，用于涡轮解码双重二进制循环系统转换编码信号
公开(公告)号：US20080273631A1
公开(公告)日：2008-11-06
申请号：US12115027
申请日：2008-05-05
申请人： Gwang-Hyun Gho , Won-Joon Choi
发明人： Gwang-Hyun Gho , Won-Joon Choi
IPC分类号： H04L27/06
CPC分类号： H04L1/0041 , H04L1/005 , H04L1/0066
摘要： A Turbo decoder and method for decoding a double-binary circular recursive systematic convolutional (DBCRSC) encoded signal with unknown initial and final states executes iterations of forward and backward recursion on a payload block of the DBCRSC encoded signal and a padded block using an estimated forward state metric (FSM) and an estimated backward state metric (BSM), which are updated at one or more iterations.
摘要翻译：用于解码具有未知初始和最终状态的双二进制循环递归系统卷积（DBCRSC）编码信号的Turbo解码器和方法在DBCRSC编码信号的有效载荷块上执行正向和反向递归的迭代，并且使用估计的前向状态度量（FSM）和估计的向后状态度量（BSM），其在一个或多个迭代中被更新。

7. 发明授权

US08050362B2 Soft-bit de-mapping device and method of generating soft bits for decoding 有权
标题翻译：软位解映射设备和生成软比特解码的方法
公开(公告)号：US08050362B2
公开(公告)日：2011-11-01
申请号：US12126859
申请日：2008-05-24
申请人： Gwang-Hyun Gho , Kee-Bong Song , Won-Joon Choi
发明人： Gwang-Hyun Gho , Kee-Bong Song , Won-Joon Choi
IPC分类号： H04L27/06
CPC分类号： H04L1/0045 , H04L1/0052 , H04L5/0007 , H04L25/067 , H04L27/2647 , H04L27/38 , H04L2025/03401 , H04L2025/03414 , H04L2025/0342
摘要： A soft-bit de-mapping device and method of generating soft bits for decoding quantizes a log-likelihood ratio (LLR) value for a received value using functions bits and channel parameter bits to generate the soft bits. The function bits are generated by quantizing an LLR function for the received value, which includes modifying an original curve of the LLR function to a modified curve such that a segment of the original curve with the lowest slope is protected in the modified curve for a fixed equal quantization step-size. The channel parameter bits are generated by quantizing a channel parameter for the received value to generate channel.
摘要翻译：产生软比特的软比特解映射装置和方法，用于使用功能比特和信道参数比特量化接收值的对数似然比（LLR）值，以生成软比特。通过量化接收值的LLR函数来生成功能位，其包括将LLR函数的原始曲线修改为修改曲线，使得具有最低斜率的原始曲线的段在修改的曲线中被保护用于固定的相等的量化步长。通过对接收到的值的信道参数进行量化以产生信道来生成信道参数位。

8. 发明申请

US20080215573A1 Inter-Frequency Neighbor List Searching 有权
标题翻译：频间相邻列表搜索
公开(公告)号：US20080215573A1
公开(公告)日：2008-09-04
申请号：US12029849
申请日：2008-02-12
申请人： Da-shan Shiu , Thomas B. Wilborn , Roland Rick , Srinivasa Rao Nagaram , Chalapathi Rao Emani , Ramachandran Gurumoorthy , Jesus Chao , Steve Doerfler , Peter Ang , Srividya Kunisetti , Gwang-Hyun Gho , Thomas Bailey
发明人： Da-shan Shiu , Thomas B. Wilborn , Roland Rick , Srinivasa Rao Nagaram , Chalapathi Rao Emani , Ramachandran Gurumoorthy , Jesus Chao , Steve Doerfler , Peter Ang , Srividya Kunisetti , Gwang-Hyun Gho , Thomas Bailey
IPC分类号： G06F17/30
CPC分类号： H04W36/0083 , H04B1/70754 , H04W36/14 , H04W88/06
摘要： Techniques for inter-frequency neighbor list searching are disclosed. Embodiments disclosed herein address the need for inter-frequency neighbor list searching. In one embodiment, a searcher is deployed to search a PN space with a first set of search parameters and to return search results. A subset of those results is selected, along with a previously saved search result, to form a set of PN locations for a second search. The second search is performed on a window around each of the PN locations, using a second set of search parameters. The maximum peak from the second search is saved for use in future iterations. In one embodiment, the subset is selected as the highest energy level peaks from the first search. In one embodiment, if a maximum peak is deemed to correspond to a valid base station when the position of that maximum peak is within a pre-determined time offset from a previous maximum peak.
摘要翻译：公开了频间邻居列表搜索技术。本文公开的实施例解决了对频间邻居列表搜索的需要。在一个实施例中，部署搜索器以利用第一组搜索参数搜索PN空间并返回搜索结果。选择这些结果的子集以及先前保存的搜索结果以形成用于第二搜索的一组PN位置。使用第二组搜索参数，在围绕每个PN位置的窗口上执行第二搜索。第二次搜索的最大峰值被保存以供将来的迭代使用。在一个实施例中，子集被选择为来自第一搜索的最高能级峰值。在一个实施例中，如果当该最大峰值的位置在与先前最大峰值的预定时间偏移之内时，认为最大峰值对应于有效基站。

9. 发明授权

US07330452B2 Inter-frequency neighbor list searching 有权
标题翻译：频间邻居列表搜索
公开(公告)号：US07330452B2
公开(公告)日：2008-02-12
申请号：US10461270
申请日：2003-06-13
申请人： Da-shan Shiu , Thomas B. Wilborn , Roland Rick , Srinivasa Rao Nagaram , Chalapathi Rao Emani , Ramachandran Gurumoorthy , Jesus Chao , Steve Doerfler , Peter Ang , Srividya Kunisetti , Gwang-Hyun Gho , Thomas Bailey
发明人： Da-shan Shiu , Thomas B. Wilborn , Roland Rick , Srinivasa Rao Nagaram , Chalapathi Rao Emani , Ramachandran Gurumoorthy , Jesus Chao , Steve Doerfler , Peter Ang , Srividya Kunisetti , Gwang-Hyun Gho , Thomas Bailey
IPC分类号： H04B7/216
CPC分类号： H04W36/0083 , H04B1/70754 , H04W36/14 , H04W88/06
摘要： Techniques for inter-frequency neighbor list searching are disclosed. Embodiments disclosed herein address the need for inter-frequency neighbor list searching. In one embodiment, a searcher is deployed to search a PN space with a first set of search parameters and to return search results. A subset of those results are selected, along with a previously saved search result, to form a set of PN locations for a second search. The second search is performed on a window around each of the PN locations, using a second set of search parameters. The maximum peak from the second search is saved for use in future iterations. In one embodiment, the subset is selected as the highest energy level peaks from the first search. In one embodiment, if a maximum peak is deemed to correspond to a valid base station when the position of that maximum peak is within a pre-determined time offset from a previous maximum peak.
摘要翻译：公开了频间邻居列表搜索技术。本文公开的实施例解决了对频间邻居列表搜索的需要。在一个实施例中，部署搜索器以利用第一组搜索参数搜索PN空间并返回搜索结果。选择这些结果的子集以及先前保存的搜索结果，以形成用于第二次搜索的一组PN位置。使用第二组搜索参数，在围绕每个PN位置的窗口上执行第二搜索。第二次搜索的最大峰值被保存以供将来的迭代使用。在一个实施例中，子集被选择为来自第一搜索的最高能级峰值。在一个实施例中，如果当该最大峰值的位置在与先前最大峰值的预定时间偏移之内时，认为最大峰值对应于有效基站。

10. 发明授权

US08059584B2 Inter-frequency neighbor list searching 有权
标题翻译：频间邻居列表搜索
公开(公告)号：US08059584B2
公开(公告)日：2011-11-15
申请号：US12029849
申请日：2008-02-12
申请人： Da-shan Shiu , Thomas B Wilborn , Roland Reinhard Rick , Srinivasa Rao Nagaram , Chalapathi Rao Emani , Ramachandran Gurumoorthy , Jesus Chao , Steve Doerfler , Peter Ang , Srividya Kunisetti , Gwang-Hyun Gho , Thomas Nelson Bailey
发明人： Da-shan Shiu , Thomas B Wilborn , Roland Reinhard Rick , Srinivasa Rao Nagaram , Chalapathi Rao Emani , Ramachandran Gurumoorthy , Jesus Chao , Steve Doerfler , Peter Ang , Srividya Kunisetti , Gwang-Hyun Gho , Thomas Nelson Bailey
IPC分类号： H04W4/00
CPC分类号： H04W36/0083 , H04B1/70754 , H04W36/14 , H04W88/06
摘要： Techniques for inter-frequency neighbor list searching are disclosed. Embodiments disclosed herein address the need for inter-frequency neighbor list searching. In one embodiment, a searcher is deployed to search a PN space with a first set of search parameters and to return search results. A subset of those results is selected, along with a previously saved search result, to form a set of PN locations for a second search. The second search is performed on a window around each of the PN locations, using a second set of search parameters. The maximum peak from the second search is saved for use in future iterations. In one embodiment, the subset is selected as the highest energy level peaks from the first search. In one embodiment, if a maximum peak is deemed to correspond to a valid base station when the position of that maximum peak is within a pre-determined time offset from a previous maximum peak.
摘要翻译：公开了频间邻居列表搜索技术。本文公开的实施例解决了对频间邻居列表搜索的需要。在一个实施例中，部署搜索器以利用第一组搜索参数搜索PN空间并返回搜索结果。选择这些结果的子集以及先前保存的搜索结果以形成用于第二搜索的一组PN位置。使用第二组搜索参数，在围绕每个PN位置的窗口上执行第二搜索。第二次搜索的最大峰值被保存以供将来的迭代使用。在一个实施例中，子集被选择为来自第一搜索的最高能级峰值。在一个实施例中，如果当该最大峰值的位置在与先前最大峰值的预定时间偏移之内时，认为最大峰值对应于有效基站。

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