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1. 发明授权

US09184942B2 Automatic gain control in a communications system 有权
标题翻译：通信系统中的自动增益控制
公开(公告)号：US09184942B2
公开(公告)日：2015-11-10
申请号：US13346055
申请日：2012-01-09
申请人： Cheng-Chou Lan , Cimarron Mittelsteadt
发明人： Cheng-Chou Lan , Cimarron Mittelsteadt
IPC分类号： H04L27/08 , H04L25/02 , H04L5/00 , H04L25/03 , H03G3/30 , H04L27/26 , H04L1/00 , H04L1/20
CPC分类号： H04L25/022 , H03G3/3068 , H03G3/3078 , H04L1/0057 , H04L1/20 , H04L5/0046 , H04L5/006 , H04L25/03159 , H04L27/2657 , H04L27/2662 , H04L2025/03414
摘要： An automatic gain control technique generates one or more gain control signals based on a known sequence of samples received in a preamble of a packet received over a particular communications link and generates one or more adjusted gain control signals based on a previously unknown sequence of samples received in a payload of a packet. In at least one embodiment of the gain control technique, time domain samples of the preamble of a symbol are used to generate the one or more gain control signals. In at least one embodiment of the gain control technique, frequency domain samples are used to generate the one or more adjusted gain control signals. The one or more gain control signals include digital and/or analog gain control signals that are provided to digital signal processing modules and/or analog circuits in an interface circuit, respectively, to adjust the gain applied to a received signal.
摘要翻译：自动增益控制技术基于在特定通信链路上接收的分组的前同步码中接收到的已知样本序列产生一个或多个增益控制信号，并且基于先前未知的样本序列生成一个或多个经调整的增益控制信号在数据包的有效载荷中。在增益控制技术的至少一个实施例中，使用符号的前导码的时域采样来生成一个或多个增益控制信号。在增益控制技术的至少一个实施例中，使用频域样本来产生一个或多个经调整的增益控制信号。一个或多个增益控制信号包括分别提供给接口电路中的数字信号处理模块和/或模拟电路的数字和/或模拟增益控制信号，以调整施加到接收信号的增益。

2. 发明授权

US09008195B2 Detection of a packet type in a communications system 有权
标题翻译：在通信系统中检测分组类型
公开(公告)号：US09008195B2
公开(公告)日：2015-04-14
申请号：US13346060
申请日：2012-01-09
申请人： Cheng-Chou Lan , Cimarron Mittelsteadt
发明人： Cheng-Chou Lan , Cimarron Mittelsteadt
IPC分类号： H04L27/00 , H04L27/26 , H04L7/033 , H04L7/04 , H04L1/00
CPC分类号： H04L27/00 , H04L1/004 , H04L7/0331 , H04L7/041 , H04L27/261 , H04L27/2647 , H04L27/2656
摘要： A technique detects the presence of a packet identification sequence in a received sequence of samples received over a communications network. The packet identification sequence, when present and properly detected in a received packet, is used to determine a particular type of the received packet from a plurality of packet types that may be received over the communications network. The technique for detecting the packet identification sequence includes detecting a null sequence in the received packet and a predetermined identification sequence in the packet. Detection of the predetermined sequence uses energy estimates for corresponding windows of received samples.
摘要翻译：技术检测在通过通信网络接收的接收的样本序列中存在分组识别序列。分组识别序列在接收到的分组中存在并被适当地检测时，用于根据通过通信网络接收的多个分组类型来确定接收分组的特定类型。用于检测分组识别序列的技术包括检测所接收分组中的空序列和分组中的预定识别序列。预定序列的检测使用接收样本的相应窗口的能量估计。

3. 发明申请

US20130128995A1 CHANNEL ESTIMATION IN A COMMUNICATIONS SYSTEM 有权
标题翻译：通信系统中的信道估计
公开(公告)号：US20130128995A1
公开(公告)日：2013-05-23
申请号：US13299751
申请日：2011-11-18
申请人： Cimarron Mittelsteadt , Cheng-Chou Lan
发明人： Cimarron Mittelsteadt , Cheng-Chou Lan
IPC分类号： H04L25/08 , H04L27/28
CPC分类号： H04L27/2689 , H04B17/26 , H04B17/345 , H04L1/206 , H04L5/0048 , H04L25/0204 , H04L25/022 , H04L25/0228 , H04L25/03159 , H04L27/2613 , H04L27/2657 , H04L27/2662 , H04L27/2672 , H04L2025/03414
摘要： A method includes generating representative noise variance estimates based on a plurality of received symbols received in an orthogonal frequency division multiplexing (OFDM) signal. The representative noise variance estimates correspond to respective frequency intervals of a plurality of frequency intervals of the OFDM channel. Individual frequency intervals of the plurality of frequency intervals include a plurality of contiguous frequency bins of the OFDM signal.
摘要翻译：一种方法包括基于在正交频分复用（OFDM）信号中接收的多个接收符号来生成代表性噪声方差估计。代表性噪声方差估计对应于OFDM信道的多个频率间隔的相应频率间隔。多个频率间隔的各个频率间隔包括OFDM信号的多个连续频率区间。

4. 发明申请

US20130128822A1 CARRIER TRACKING WITHOUT PILOTS 有权
标题翻译：携带跟踪没有PILOTS
公开(公告)号：US20130128822A1
公开(公告)日：2013-05-23
申请号：US13299757
申请日：2011-11-18
申请人： Cimarron Mittelsteadt , Cheng-Chou Lan
发明人： Cimarron Mittelsteadt , Cheng-Chou Lan
IPC分类号： H04W72/04
CPC分类号： H04L5/0046 , H04L5/0007 , H04L5/0042 , H04L5/0053 , H04L5/006 , H04L5/0094 , H04L27/2657 , H04L27/2679
摘要： A carrier tracking technique includes allocating a first number of bits per symbol to a carrier tracking subcarrier of a plurality of subcarriers of an orthogonal frequency division multiplexing (OFDM) signal based on a first target performance margin. The technique includes allocating numbers of bits per symbol to other subcarriers of the plurality of subcarriers based on a second target performance margin.
摘要翻译：载波跟踪技术包括：基于第一目标性能裕度，将每个符号的第一比特数分配给正交频分复用（OFDM）信号的多个子载波中的载波跟踪子载波。该技术包括基于第二目标性能裕度来将每个符号的比特数分配给多个子载波中的其他子载波。

5. 发明授权

US08971463B2 Channel estimation in a communications system 有权
标题翻译：通信系统中的信道估计
公开(公告)号：US08971463B2
公开(公告)日：2015-03-03
申请号：US13299751
申请日：2011-11-18
申请人： Cimarron Mittelsteadt , Cheng-Chou Lan
发明人： Cimarron Mittelsteadt , Cheng-Chou Lan
IPC分类号： H04L25/08 , H04L27/26 , H04L25/02 , H04L25/03 , H04B17/00 , H04L1/20 , H04L5/00
CPC分类号： H04L27/2689 , H04B17/26 , H04B17/345 , H04L1/206 , H04L5/0048 , H04L25/0204 , H04L25/022 , H04L25/0228 , H04L25/03159 , H04L27/2613 , H04L27/2657 , H04L27/2662 , H04L27/2672 , H04L2025/03414
摘要： A method includes generating representative noise variance estimates based on a plurality of received symbols received in an orthogonal frequency division multiplexing (OFDM) signal. The representative noise variance estimates correspond to respective frequency intervals of a plurality of frequency intervals of the OFDM channel. Individual frequency intervals of the plurality of frequency intervals include a plurality of contiguous frequency bins of the OFDM signal.
摘要翻译：一种方法包括基于在正交频分复用（OFDM）信号中接收的多个接收符号来生成代表性噪声方差估计。代表性噪声方差估计对应于OFDM信道的多个频率间隔的相应频率间隔。多个频率间隔的各个频率间隔包括OFDM信号的多个连续频率区间。

6. 发明授权

US08780838B2 Carrier tracking without pilots 有权
标题翻译：运营商跟踪没有飞行员
公开(公告)号：US08780838B2
公开(公告)日：2014-07-15
申请号：US13299757
申请日：2011-11-18
申请人： Cimarron Mittelsteadt , Cheng-Chou Lan
发明人： Cimarron Mittelsteadt , Cheng-Chou Lan
IPC分类号： H04W4/00
CPC分类号： H04L5/0046 , H04L5/0007 , H04L5/0042 , H04L5/0053 , H04L5/006 , H04L5/0094 , H04L27/2657 , H04L27/2679
摘要： A carrier tracking technique includes allocating a first number of bits per symbol to a carrier tracking subcarrier of a plurality of subcarriers of an orthogonal frequency division multiplexing (OFDM) signal based on a first target performance margin. The technique includes allocating numbers of bits per symbol to other subcarriers of the plurality of subcarriers based on a second target performance margin.
摘要翻译：载波跟踪技术包括：基于第一目标性能裕度，将每个符号的第一比特数分配给正交频分复用（OFDM）信号的多个子载波中的载波跟踪子载波。该技术包括基于第二目标性能裕度来将每个符号的比特数分配给多个子载波中的其他子载波。

7. 发明申请

US20130177112A1 AUTOMATIC GAIN CONTROL IN A COMMUNICATIONS SYSTEM 有权
标题翻译：通信系统中的自动增益控制
公开(公告)号：US20130177112A1
公开(公告)日：2013-07-11
申请号：US13346055
申请日：2012-01-09
申请人： Cheng-Chou Lan , Cimarron Mittelsteadt
发明人： Cheng-Chou Lan , Cimarron Mittelsteadt
IPC分类号： H04L27/08
CPC分类号： H04L25/022 , H03G3/3068 , H03G3/3078 , H04L1/0057 , H04L1/20 , H04L5/0046 , H04L5/006 , H04L25/03159 , H04L27/2657 , H04L27/2662 , H04L2025/03414
摘要： An automatic gain control technique generates one or more gain control signals based on a known sequence of samples received in a preamble of a packet received over a particular communications link and generates one or more adjusted gain control signals based on a previously unknown sequence of samples received in a payload of a packet. In at least one embodiment of the gain control technique, time domain samples of the preamble of a symbol are used to generate the one or more gain control signals. In at least one embodiment of the gain control technique, frequency domain samples are used to generate the one or more adjusted gain control signals. The one or more gain control signals include digital and/or analog gain control signals that are provided to digital signal processing modules and/or analog circuits in an interface circuit, respectively, to adjust the gain applied to a received signal.
摘要翻译：自动增益控制技术基于在特定通信链路上接收的分组的前同步码中接收到的已知样本序列产生一个或多个增益控制信号，并且基于先前未知的样本序列生成一个或多个经调整的增益控制信号在数据包的有效载荷中。在增益控制技术的至少一个实施例中，使用符号的前导码的时域采样来生成一个或多个增益控制信号。在增益控制技术的至少一个实施例中，使用频域样本来产生一个或多个经调整的增益控制信号。一个或多个增益控制信号包括分别提供给接口电路中的数字信号处理模块和/或模拟电路的数字和/或模拟增益控制信号，以调整施加到接收信号的增益。

8. 发明申请

US20130177088A1 DETECTION OF A PACKET TYPE IN A COMMUNICATIONS SYSTEM 有权
标题翻译：在通信系统中检测分组类型
公开(公告)号：US20130177088A1
公开(公告)日：2013-07-11
申请号：US13346060
申请日：2012-01-09
申请人： Cheng-Chou Lan , Cimarron Mittelsteadt
发明人： Cheng-Chou Lan , Cimarron Mittelsteadt
IPC分类号： H04L27/00
CPC分类号： H04L27/00 , H04L1/004 , H04L7/0331 , H04L7/041 , H04L27/261 , H04L27/2647 , H04L27/2656
摘要： A technique detects the presence of a packet identification sequence in a received sequence of samples received over a communications network. The packet identification sequence, when present and properly detected in a received packet, is used to determine a particular type of the received packet from a plurality of packet types that may be received over the communications network. The technique for detecting the packet identification sequence includes detecting a null sequence in the received packet and a predetermined identification sequence in the packet. Detection of the predetermined sequence uses energy estimates for corresponding windows of received samples.
摘要翻译：技术检测在通过通信网络接收的接收的样本序列中存在分组识别序列。分组识别序列在接收到的分组中存在并被适当地检测时，用于根据通过通信网络接收的多个分组类型来确定接收分组的特定类型。用于检测分组识别序列的技术包括检测所接收分组中的空序列和分组中的预定识别序列。预定序列的检测使用接收样本的相应窗口的能量估计。

9. 发明授权

US07987410B2 Systems and methods for decreasing latency in a digital transmission system 有权
标题翻译：用于减少数字传输系统中的延迟的系统和方法
公开(公告)号：US07987410B2
公开(公告)日：2011-07-26
申请号：US12712435
申请日：2010-02-25
申请人： David Hedberg , Cimarron Mittelsteadt , Wen Yen Weng
发明人： David Hedberg , Cimarron Mittelsteadt , Wen Yen Weng
IPC分类号： H03M13/00
CPC分类号： H04L1/0057 , H03M13/1102 , H03M13/353 , H03M13/618 , H04L1/0041 , H04L1/005 , H04L1/0083 , H04L1/1829
摘要： Disclosed herein are various embodiments of methods, systems, and apparatus for encoding OFDM packets in a digital communication system. In one exemplary method embodiment, LDPC codewords in an IEEE 802.11 wireless transmission are shortened, decreasing the iterations necessary to insure accurate communications. The codewords are shortened by adding known bits in predetermined locations in the last data symbol of a packet.
摘要翻译：这里公开了用于在数字通信系统中对OFDM分组进行编码的方法，系统和装置的各种实施例。在一个示例性方法实施例中，IEEE 802.11无线传输中的LDPC码字被缩短，减少了确保准确通信所必需的迭代。通过在分组的最后数据符号中的预定位置中添加已知位来缩短码字。

10. 发明授权

US07698623B2 Systems and methods for decreasing latency in a digital transmission system 有权
标题翻译：用于减少数字传输系统中的延迟的系统和方法
公开(公告)号：US07698623B2
公开(公告)日：2010-04-13
申请号：US11203617
申请日：2005-08-12
申请人： David Hedberg , Cimarron Mittelsteadt , Wen Yen Weng
发明人： David Hedberg , Cimarron Mittelsteadt , Wen Yen Weng
IPC分类号： H03M13/00 , H03M13/03
CPC分类号： H04L1/0057 , H03M13/1102 , H03M13/353 , H03M13/618 , H04L1/0041 , H04L1/005 , H04L1/0083 , H04L1/1829
摘要： Disclosed herein are various embodiments of methods, systems, and apparatus for encoding OFDM packets in a digital communication system. In one exemplary method embodiment, LDPC codewords in an IEEE 802.11 wireless transmission are shortened, decreasing the iterations necessary to insure accurate communications. The codewords are shortened by adding known bits in predetermined locations in the last data symbol of a packet.
摘要翻译：这里公开了用于在数字通信系统中对OFDM分组进行编码的方法，系统和装置的各种实施例。在一个示例性方法实施例中，IEEE 802.11无线传输中的LDPC码字被缩短，减少了确保准确通信所必需的迭代。通过在分组的最后数据符号中的预定位置中添加已知位来缩短码字。

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