-
公开(公告)号：US07751520B1
公开(公告)日：2010-07-06
申请号：US10666723
申请日：2003-09-17
IPC分类号： H03D3/24
CPC分类号： H04L27/0014 , H04L7/042 , H04L25/0226 , H04L2027/003
摘要： Techniques are disclosed for detecting a packet. One technique includes sampling a received signal to produce a sequence of samples wherein the sequence of samples includes a plurality of subsequences of samples; cross correlating the subsequences of samples with a known form of the subsequence to produce cross correlations; self correlating the cross correlations to produce a plurality of self correlations; summing the self correlations; and processing the sum of the self correlations.
摘要翻译： 公开了用于检测分组的技术。 一种技术包括对接收到的信号进行采样以产生样本序列，其中样本序列包括多个样本的子序列; 将样本的子序列与已知形式的子序列交叉相关以产生互相关; 自相关互相关产生多个自相关; 求和自相关; 并处理自相关的总和。
-
公开(公告)号：US20100098183A1
公开(公告)日：2010-04-22
申请号：US12615024
申请日：2009-11-09
申请人： John S. Thomson , Paul J. Husted , Ardavan M. Tehrani , Jeffrey M. Gilbert , William J. McFarland , Lars E. Thon , Yi-Hsiu Wang
发明人： John S. Thomson , Paul J. Husted , Ardavan M. Tehrani , Jeffrey M. Gilbert , William J. McFarland , Lars E. Thon , Yi-Hsiu Wang
IPC分类号： H04L5/12
CPC分类号： H04L25/067 , H03M13/25 , H03M13/3961 , H03M13/41 , H03M13/6325 , H03M13/6362 , H04K3/228 , H04L1/005 , H04L1/0054 , H04L27/38
摘要： A Viterbi decoding system interprets bits in received QAM constellations as many-valued parameters rather than binary valued parameters. It performs the Viterbi algorithm using these many-valued parameters to provide results superior to hard decision decoding. Rather than applying a hard 0-1 function to the QAM data, the system uses a non-stepped linear or curved transfer function to assign values to the bits. In another aspect, a system differentiates between data bits based on their estimated reliability, giving more emphasis to decoding reliable bits than unreliable bits using any of a variety of techniques. By differentiating between god and bad bits and de-emphasizing or ignoring unreliable bits, the system can provide a significant reduction in uncorrectable errors and packet loss.
摘要翻译： 维特比解码系统将接收的QAM星座中的比特解释为多值参数，而不是二进制值参数。 它使用这些多值参数来执行维特比算法，以提供优于硬判决解码的结果。 系统使用非阶梯线性或弯曲传递函数来向位指定值，而不是将硬0-1函数应用于QAM数据。 在另一方面，一种系统基于其估计的可靠性来区分数据比特，更多地强调使用各种技术中的任何一种来解码可靠比特比不可靠比特。 通过区分神和坏位，并且不强调或忽略不可靠比特，系统可以显着减少不可校正的错误和分组丢失。
-
公开(公告)号：US20080123761A1
公开(公告)日：2008-05-29
申请号：US11952040
申请日：2007-12-06
申请人： Won-Joon Choi , Jeffrey M. Gilbert , Yi-Hsiu Wang , Xiaoru Zhang
发明人： Won-Joon Choi , Jeffrey M. Gilbert , Yi-Hsiu Wang , Xiaoru Zhang
IPC分类号： H04L27/28
CPC分类号： H04L25/0232 , H04L1/0045 , H04L27/2647
摘要： Spurs cause significant problems with signal detecting, amplifier gain adjustment, and signal decoding. Various techniques can be used to mitigate the effects of spurs on a received signal. Generally, these techniques work by either canceling or ignoring the spurs. For example, a pilot mask can be used to ignore pilot information in one or more sub-channels. A Viterbi mask can determine the weighting given to bits in a sub-channel based on spur and data rate information. Channel interpolation can compute a pseudo channel estimate for a sub-channel known to have a spur location can be computed by interpolating the channel estimates of adjacent good sub-channels. Filtering of the received signal using a low-pass filter, a growing box filter, or a low-pass filter with self-correlation can be used to cancel a spur.
摘要翻译： 马刺在信号检测，放大器增益调整和信号解码方面造成重大问题。 可以使用各种技术来减轻杂散对接收信号的影响。 一般来说，这些技术通过取消或忽略杂散来工作。 例如，可以使用导频掩码来忽略一个或多个子信道中的导频信息。 维特比掩码可以基于支线和数据速率信息来确定子信道中的比特的加权。 信道内插可以计算已知具有支路位置的子信道的伪信道估计，可以通过内插相邻的良好子信道的信道估计来计算。 使用低通滤波器，增长盒滤波器或具有自相关的低通滤波器对接收信号进行滤波可以用于取消杂散。
-
公开(公告)号：US20080112101A1
公开(公告)日：2008-05-15
申请号：US11939726
申请日：2007-11-14
CPC分类号： H01L27/0251 , H04L25/0266
摘要： An integrated circuit chip has on-chip millimeter wave (mmW) circuitry. An on-chip electro static discharge, ESD, protection network couples a signal pad of the chip to the mmW circuitry. The ESD protection network has a shorted stub being a low impedance path to ground for ESD events. Other embodiments are also described and claimed.
摘要翻译： 集成电路芯片具有片上毫米波（mmW）电路。 片上静电放电，ESD保护网络将芯片的信号焊盘连接到mmW电路。 ESD保护网络具有短路短路，是ESD事件的低阻抗接地路径。 还描述和要求保护其他实施例。
-
45.发明授权Wireless LAN using RSSI and BER parameters for transmission rate adaptation 有权无线局域网使用RSSI和BER参数进行传输速率适配公开(公告)号：US07369510B1
公开(公告)日：2008-05-06
申请号：US10809287
申请日：2004-03-24
IPC分类号： H04L1/00
CPC分类号： H04L1/20 , H04L1/0002 , H04L1/16
摘要： Dynamic conditions present in a channel can quickly degrade signal quality, thereby reducing the data rate usable by a WLAN transmitter. For maximum throughput, the highest, reliable data rate available should be used. In accordance with one feature of an adaptive rate technique, a lookup RSSI from one or more acknowledgment packets can be determined. One or more valid data rates can then be determined, wherein a valid data rate has an RSSI threshold less than or equal to the lookup RSSI. An achievable throughput can be computed for each valid data rate based on a theoretical rate and a packet error rate (PER). The valid data rate having the highest achievable throughput can be chosen as the new transmission rate. A rate control table, which can include RSSI thresholds, UDP rates, and PERs for each supported data rate, can be updated based on actual transmission information.
摘要翻译： 信道中存在的动态条件可能会迅速降低信号质量，从而降低WLAN发射机可用的数据速率。 为了获得最大吞吐量，应使用最高可靠的数据速率。 根据自适应速率技术的一个特征，可以确定来自一个或多个确认分组的查找RSSI。 然后可以确定一个或多个有效数据速率，其中有效数据速率具有小于或等于查找RSSI的RSSI阈值。 可以基于理论速率和分组错误率（PER）为每个有效数据速率计算可实现的吞吐量。 可以选择具有最高可实现吞吐量的有效数据速率作为新的传输速率。 可以基于实际的传输信息来更新可以包括每个支持的数据速率的RSSI阈值，UDP速率和PER的速率控制表。
-
46.发明授权Apparatus and method of multiple antenna receiver combining of high data rate wideband packetized wireless communication signals 有权多天线接收机组合高数据率宽带分组化无线通信信号的装置和方法公开(公告)号：US07366089B2
公开(公告)日：2008-04-29
申请号：US10682787
申请日：2003-10-08
IPC分类号： H04L5/04
CPC分类号： H04L27/2657 , H04B7/0845 , H04B7/0848 , H04L27/2663 , H04L27/2665 , H04L27/2675
摘要： The present invention provides an apparatus and method of multiple antenna receiver combining of high data rate wideband packetized wireless communication signals, where the apparatus includes M receive antennas, receiving M high data rate wideband packetized wireless communication signals, where each of the signals includes N frequency bins. The apparatus, in an exemplary embodiment, includes (1) a joint timing recovery units that perform joint coarse signal timing estimation, joint frequency offset estimation, and joint fine timing estimation on each of the signals, (2) M Fast Fourier Transform units (FFTs) that each convert the digital data for each of the M signals into frequency domain information for each of the N received frequencies and that output Q pilots for each of the signals, where Q is a positive integer, and (3) a combiner that weights and combines the outputs of the M FFTs for each of the N received frequencies.
摘要翻译： 本发明提供了一种多天线接收机组合的高数据率宽带分组化无线通信信号的装置和方法，其中该装置包括M个接收天线，接收M个高数据速率宽带分组化无线通信信号，其中每个信号包括N个频率 箱子。 在一个示例性实施例中，该装置包括（1）联合定时恢复单元，其对每个信号执行联合粗略信号定时估计，联合频率偏移估计和联合精细定时估计，（2）M个快速傅里叶变换单元 FFT），其将每个M个信号的数字数据转换为N个接收频率中的每一个的频域信息，并且为每个信号输出Q个导频，其中Q是正整数，以及（3）组合器， 对N个接收频率中的每一个进行加权并组合M FFT的输出。
-
公开(公告)号：US07321631B1
公开(公告)日：2008-01-22
申请号：US11461347
申请日：2006-07-31
申请人： Won-Joon Choi , Jeffrey M. Gilbert , Yi-Hsiu Wang , Xiaoru Zhang
发明人： Won-Joon Choi , Jeffrey M. Gilbert , Yi-Hsiu Wang , Xiaoru Zhang
CPC分类号： H04L25/0232 , H04L1/0045 , H04L27/2647
摘要： Spurs cause significant problems with signal detecting, amplifier gain adjustment, and signal decoding. Various techniques can be used to mitigate the effects of spurs on a received signal. Generally, these techniques work by either canceling or ignoring the spurs. For example, a pilot mask can be used to ignore pilot information in one or more sub-channels. A Viterbi mask can determine the weighting given to bits in a sub-channel based on spur and data rate information. Channel interpolation can compute a pseudo channel estimate for a sub-channel known to have a spur location can be computed by interpolating the channel estimates of adjacent good sub-channels. Filtering of the received signal using a low-pass filter, a growing box filter, or a low-pass filter with self-correlation can be used to cancel a spur.
摘要翻译： 马刺在信号检测，放大器增益调整和信号解码方面造成重大问题。 可以使用各种技术来减轻杂散对接收信号的影响。 一般来说，这些技术通过取消或忽略杂散来工作。 例如，可以使用导频掩码来忽略一个或多个子信道中的导频信息。 维特比掩码可以基于支线和数据速率信息来确定子信道中的比特的加权。 信道内插可以计算已知具有支路位置的子信道的伪信道估计，可以通过内插相邻的良好子信道的信道估计来计算。 使用低通滤波器，增长盒滤波器或具有自相关的低通滤波器对接收信号进行滤波可以用于取消杂散。
-
公开(公告)号：US07173972B2
公开(公告)日：2007-02-06
申请号：US09816810
申请日：2001-03-23
申请人： John S. Thomson , Paul J. Hustad , Ardavan M. Tehrani , Jeffrey M. Gilbert , William J. McFarland , Lars E. Thon , Yi-Hsiu Wang
发明人： John S. Thomson , Paul J. Hustad , Ardavan M. Tehrani , Jeffrey M. Gilbert , William J. McFarland , Lars E. Thon , Yi-Hsiu Wang
CPC分类号： H04L25/067 , H03M13/25 , H03M13/3961 , H03M13/41 , H03M13/6325 , H03M13/6362 , H04K3/228 , H04L1/005 , H04L1/0054 , H04L27/38
摘要： A Viterbi decoding system interprets bits in received QAM constellations as many-valued parameters rather than binary valued parameters. It performs the Viterbi algorithm using these many-valued parameters to provide results superior to hard decision decoding. Rather than applying a hard 0-1 function to the QAM data, the system uses a non-stepped linear or curved transfer function to assign values to the bits. In another aspect, a system differentiates between data bits based on their estimated reliability, giving more emphasis to decoding reliable bits than unreliable bits using any of a variety of techniques. By differentiating between god and bad bits and de-emphasizing or ignoring unreliable bits, the system can provide a significant reduction in uncorrectable errors and packet loss.
摘要翻译： 维特比解码系统将接收的QAM星座中的比特解释为多值参数，而不是二进制值参数。 它使用这些多值参数来执行维特比算法，以提供优于硬判决解码的结果。 系统使用非阶梯线性或弯曲传递函数来向位指定值，而不是将硬0-1函数应用于QAM数据。 在另一方面，一种系统基于其估计的可靠性来区分数据比特，更多地强调使用各种技术中的任何一种来解码可靠比特比不可靠比特。 通过区分神和坏位，并且不强调或忽略不可靠比特，系统可以显着减少不可校正的错误和分组丢失。
-
公开(公告)号：US07129884B1
公开(公告)日：2006-10-31
申请号：US10884785
申请日：2004-07-01
摘要： A radar detection technique in a WLAN device can include a short pulse detection technique and a long pulse detection technique that can be performed using multiple receive chains. Short pulse detection is particularly effective when the incoming signal includes one or a limited number of main pulses and some residual pulses. In contrast, long pulse detection is particularly effective when the incoming signal is longer, thereby allowing various characteristics of the incoming signal to be accurately measured.
摘要翻译： WLAN设备中的雷达检测技术可以包括可以使用多个接收链执行的短脉冲检测技术和长脉冲检测技术。 当输入信号包括一个或有限数量的主脉冲和一些残留脉冲时，短脉冲检测特别有效。 相比之下，当输入信号较长时，长脉冲检测特别有效，从而允许准确地测量输入信号的各种特性。
-
公开(公告)号：US6111816A
公开(公告)日：2000-08-29
申请号：US965663
申请日：1997-11-06
CPC分类号： G01S7/52085 , G01S15/8927 , G01S7/52095 , G10K11/346 , H01Q25/00 , H01Q3/26 , H01Q3/2682
摘要： A multi-dimensional beamforming device that performs consecutive one-dimensional operations. For example, beamsteering for a two-dimensional array can be include a projection of a beam onto each of the respective axes of the array. In such a device, a first beamforming processing element is used to form multiple beams for each array output along a given row. In a preferred embodiment, sequential output vectors from the first processing element are then applied to a transposing or corner turning memory and the data are reformatted such that all elements on a given column of the array are applied to a second beam forming processing element.
摘要翻译： 执行连续一维操作的多维波束成形装置。 例如，用于二维阵列的波束引导可以包括将波束投影到阵列的每个相应的轴上。 在这种装置中，第一波束成形处理元件用于沿着给定的行为每个阵列输出形成多个波束。 在优选实施例中，来自第一处理元件的顺序输出矢量然后被施加到转置或转角转动存储器，并且重新格式化数据，使得阵列的给定列上的所有元素被施加到第二波束形成处理元件。
-
-
-
-
-
-
-
-
-
搜索结果
72 条记录 (耗时 0.065 秒)