公开(公告)号：US20060029145A1

公开(公告)日：2006-02-09

申请号：US11114752

申请日：2005-04-25

申请人： Sridhar Rajagopal ,  Matthew Shoemake ,  John Terry

发明人： Sridhar Rajagopal ,  Matthew Shoemake ,  John Terry

IPC分类号： H04L23/02

CPC分类号： H04L25/4917 ,  H03M13/2707 ,  H03M13/4161 ,  H04L1/0041 ,  H04L1/0054 ,  H04L1/006 ,  H04L1/0069 ,  H04L1/007 ,  H04L1/0071 ,  H04L27/34

摘要： A method and apparatus for encoding data for wireless transmission. The invention includes multi-level coding in which data is partitioned between two encoders, one for encoding Most Significant Bits (MSBs) and the other for encoding Least Significant Bits (LSBs). By partition bits separately for the MSBs and LSBs, the complexity of the decoder may be reduced. The MSBs and LSBs are interleaved such that each MSB is a function of just one LSB, simplifying branch metric selection during Viterbi decoding. This also allows parallel de-interleaving by the receiver, which reduces the interleaving latency of the receiver. A block interleaver jointly optimizes the symbol hamming distance of the symbols and the bit hamming distance of each constituent encoder for the MSBs and LSBs.

摘要翻译： 一种用于编码无线传输数据的方法和装置。 本发明包括多级编码，其中数据在两个编码器之间分配，一个用于编码最高有效位（MSB），另一个用于编码最低有效位（LSB）。 通过分开MSB和LSB的分配位，解码器的复杂度可能会降低。 MSB和LSB被交错，使得每个MSB是仅一个LSB​​的函数，从而简化维特比解码期间的分支度量选择。 这也允许接收机的并行解交织，这降低了接收机的交织等待时间。 块交织器共同优化符号的符号汉明距离和每个组成编码器对于MSB和LSB的比特汉明距离。

公开(公告)号：US20050237922A1

公开(公告)日：2005-10-27

申请号：US11114646

申请日：2005-04-25

申请人： Matthew Shoemake ,  Sridhar Rajagopal ,  David Brenner

发明人： Matthew Shoemake ,  Sridhar Rajagopal ,  David Brenner

IPC分类号： H04J11/00 ,  H04L27/26

CPC分类号： H04L27/2602

摘要： The present invention provides a method for enabling side channel communication between wireless devices. In one embodiment of the invention the guard tones in wireless OFDM signals are used for side channel communication. In another embodiment of the invention, unused bits in OFDM symbols are used as side channels instead of being padded with zeros or random bits.

摘要翻译： 本发明提供了一种用于实现无线设备之间的侧信道通信的方法。 在本发明的一个实施例中，无线OFDM信号中的保护音调用于侧信道通信。 在本发明的另一实施例中，OFDM符号中的未使用的比特用作侧信道，而不是用零或随机比特填充。

公开(公告)号：US20050232425A1

公开(公告)日：2005-10-20

申请号：US11108410

申请日：2005-04-18

申请人： John Hughes ,  Matthew Shoemake ,  Sidney Schrum

发明人： John Hughes ,  Matthew Shoemake ,  Sidney Schrum

IPC分类号： H04K1/00 ,  H04W12/00 ,  H04W12/12

CPC分类号： H04W12/12 ,  H04W12/00

摘要： The convenience of a wireless network is tempered by the concern that a rogue device can listen in on the wireless communications. Determining the position of the home device and other devices within range allows the user of the home device to choose the specific wireless devices with which to communicate. The distance to the other devices within wireless communications range is helpful and allows the user to sort between safe and unsafe or rogue devices. Distance can be determined by a variety of methods including use of trusted references, signal strength, and error rate. Once the safe device is selected, the system will then establish a communications path with that device.

摘要翻译： 无线网络的便利性受到流氓设备可以在无线通信中收听的担忧的缓解。 确定家用设备和其他设备在范围内的位置允许家庭设备的用户选择与之进行通信的特定无线设备。 与无线通信范围内的其他设备的距离是有帮助的，并允许用户在安全和不安全或流氓设备之间进行排序。 距离可以通过各种方法来确定，包括使用可信参考，信号强度和误码率。 一旦选择了安全设备，系统将建立与该设备的通信路径。

公开(公告)号：US20090053999A1

公开(公告)日：2009-02-26

申请号：US12197184

申请日：2008-08-22

申请人： Matthew Shoemake ,  Greg Christison

发明人： Matthew Shoemake ,  Greg Christison

IPC分类号： H04B15/00

CPC分类号： H04W92/02 ,  H04W4/18 ,  H04W24/00 ,  H04W76/10 ,  H04W84/12

摘要： A method for providing wireless Ethernet connectivity over an UWB link includes providing an adapter coupled to an external network via an Ethernet port, monitoring, by the adapter, a plurality of communication channels in an UWB spectrum, establishing a wireless link on a preferred communication channel, and exchanging data between the adapter and a UWB-enabled device over the wireless link.

摘要翻译： 一种用于在UWB链路上提供无线以太网连接的方法包括提供经由以太网端口耦合到外部网络的适配器，由适配器监测UWB频谱中的多个通信信道，在优选通信信道上建立无线链路 并且通过无线链路在适配器和启用UWB的设备之间交换数据。

公开(公告)号：US20050289631A1

公开(公告)日：2005-12-29

申请号：US11165072

申请日：2005-06-23

申请人： Matthew Shoemake

发明人： Matthew Shoemake

IPC分类号： H04N7/16 ,  H04N7/173

CPC分类号： H04N21/41407 ,  H04N7/163 ,  H04N21/4122 ,  H04N21/43637

摘要： The present invention provides a video display system that uses an Ultra Wideband connection to transmit digital video and audio signals from a source device to a wireless video display. The transmission is based on DVI, HDMI, or other suitable wired digital interface. The video source device may be a mobile computing device. The source device can adjust the refresh rate and/or interlacing mode in order to match the data rate to the current capacity of the wireless channel. In one embodiment, the source device only updates the portion(s) of the screen image that has changed. In another embodiment of the invention, the source device includes a lossless compression engine and the wireless display incorporates a corresponding decompression engine to enable more efficient operation and higher performance.

摘要翻译： 本发明提供了一种视频显示系统，其使用超宽带连接将数字视频和音频信号从源设备传输到无线视频显示器。 传输基于DVI，HDMI或其他合适的有线数字接口。 视频源设备可以是移动计算设备。 源设备可以调整刷新率和/或交织模式，以便将数据速率与无线信道的当前容量相匹配。 在一个实施例中，源设备仅更新已经改变的屏幕图像的部分。 在本发明的另一个实施例中，源设备包括无损压缩引擎，并且无线显示器包括相应的减压引擎，以实现更有效的操作和更高的性能。

公开(公告)号：US20050204269A1

公开(公告)日：2005-09-15

申请号：US11038470

申请日：2005-01-19

申请人： Matthew Shoemake

发明人： Matthew Shoemake

IPC分类号： H03M13/03

CPC分类号： H03M13/6362 ,  H03M13/23 ,  H03M13/655

摘要： Coding apparatus, and an associated method, for forming punctured binary convolutional codes for use in a multi-band OFDM ultra wide band radio communication system. Input data to be communicated is provided to a convolutional coder that forms a ⅓ rate code forming first-stage codes. The ⅓ rate code is punctured by a puncture matrix to form resultant code words. The puncture matrix is of values that optimize code performance at various code rates.

摘要翻译： 编码装置和相关方法，用于形成用于多频带OFDM超宽带无线电通信系统中的穿孔二进制卷积码。 将要传送的输入数据提供给形成第一级代码的1/3速率代码的卷积编码器。 通过穿孔矩阵对1/3速率码进行穿孔，形成合成码字。 穿刺矩阵是以各种代码率优化代码性能的值。

公开(公告)号：US20050047425A1

公开(公告)日：2005-03-03

申请号：US10654161

申请日：2003-09-03

申请人： Yonghe Liu ,  Matthew Shoemake

发明人： Yonghe Liu ,  Matthew Shoemake

IPC分类号： H04L12/24 ,  H04L12/56

CPC分类号： H04L47/6215 ,  H04L47/14 ,  H04L47/50 ,  H04L47/60

摘要： System and method for scheduling messages in a digital communications system with reduced system resource requirements. A preferred embodiment comprises a plurality of traffic queues (such as traffic queue 410) used to enqueue message of differing traffic types and a first scheduler (such as priority scheduler 430). The first scheduler to select messages from the traffic queues and provide them to a plurality of priority queues (such as priority queue 455) used to enqueue messages of differing priorities. A second scheduler (such as priority scheduler 475) then selects messages for transmission based on message priority, transmission opportunity, and time to transmit.

摘要翻译： 用于在具有减少的系统资源需求的数字通信系统中调度消息的系统和方法。 优选实施例包括用于排队不同业务类型的消息的多个业务队列（例如业务队列410）和第一调度器（诸如优先级调度器430）。 第一调度器，用于从业务队列中选择消息，并将其提供给多个优先级队列（如优先级队列455），用于对不同优先级的消息进行排队。 然后，第二调度器（例如优先级调度器475）基于消息优先级，发送机会和发送时间选择用于发送的消息。

公开(公告)号：US20060211377A1

公开(公告)日：2006-09-21

申请号：US11226654

申请日：2005-09-14

申请人： Matthew Shoemake ,  Sridhar Rajagopal ,  John Terry

发明人： Matthew Shoemake ,  Sridhar Rajagopal ,  John Terry

IPC分类号： H04B17/00

CPC分类号： H04B17/345

摘要： The present invention provides a method and apparatus for detecting interference in a wireless communications system. The invention compares the receiver FFT output of a received signal against known sequences such as the packet synchronization sequence, frame synchronization sequence, and channel estimation sequence. By comparing the reference signal to the known sequences, the invention estimates the instantaneous signal to noise ratio (SNR) for each tone of a wireless transmission. To improve the SNR estimate, the invention computes a weighted average across multiple OFDM symbols. The invention looks for significant increases (spikes) in the SNR as a way of distinguishing interfering signals from noise. The invention can store separate SNR estimates for each transmitter in a wireless network. One embodiment of the invention uses Viterbi branch metrics in conjunction with the estimated SNR to determine the presence of an interfering signal. If interference is detected the invention feeds the inverse of the SNR estimate into the Viterbi decoder or declares and erasure for that symbol.

摘要翻译： 本发明提供一种用于检测无线通信系统中的干扰的方法和装置。 本发明将接收信号的接收机FFT输出与诸如分组同步序列，帧同步序列和信道估计序列的已知序列进行比较。 通过将参考信号与已知序列进行比较，本发明估计无线传输的每个音调的瞬时信噪比（SNR）。 为了提高SNR估计，本发明计算跨多个OFDM符号的加权平均。 本发明寻找SNR中的显着增加（尖峰）作为区分干扰信号和噪声的一种方式。 本发明可以在无线网络中为每个发射机存储单独的SNR估计。 本发明的一个实施例使用维特比分支度量结合估计的SNR来确定干扰信号的存在。 如果检测到干扰，本发明将SNR估计的逆向馈送到维特比解码器中，或者声明并擦除该符号。

公开(公告)号：US20060026491A1

公开(公告)日：2006-02-02

申请号：US11179248

申请日：2005-07-12

申请人： Matthew Shoemake ,  Sridhar Rajagopal

发明人： Matthew Shoemake ,  Sridhar Rajagopal

IPC分类号： H03M13/00

CPC分类号： H04L1/20 ,  H04L1/0002 ,  H04L1/0026 ,  H04L1/1607

摘要： The present invention provides a method and system for controlling the data rate in packet based wireless communications. Then, using the probability of error, the invention calculates the throughput and drop probability for two or more data rates and selects the data rate with highest throughput. In one embodiment of the invention, the probability of error based on information passed back from the receiver regarding decoding errors. In another embodiment, the probability of error is based on acknowledgement packets returned by the receiver.

公开(公告)号：US20050271088A1

公开(公告)日：2005-12-08

申请号：US11125714

申请日：2005-05-10

申请人： Matthew Shoemake ,  Sridhar Rajagopal ,  Lee Bradshaw

发明人： Matthew Shoemake ,  Sridhar Rajagopal ,  Lee Bradshaw

IPC分类号： H04J3/12 ,  H04L1/00 ,  H04L27/26

CPC分类号： H04L1/0059 ,  H04L1/0041 ,  H04L1/0069 ,  H04L1/0071 ,  H04L27/2602 ,  H04L27/261

摘要： The present invention provides a method and system for increasing communication robustness between wireless communication devices by transmitting data on Orthogonal Frequency Division Multiplexing (OFDM) guard tones. In one embodiment, punctured bits are sent on the guard tones. In an alternate embodiment, the full bandwidth provided by the guard tones in used to determine the optimal puncture pattern. The present invention can also use guard tones to duplicate data from those tones which are experiencing channel interference. The receiver feeds back information about tones in interference, and the transmitter send the interfered data on the guard tones. Guard tones are used for sending feedback information to the transmitter in order to increase system robustness. This provides the transmitter with information on how to use the guard tones and adapt the transmission data rates to maximize system performance.

摘要翻译： 本发明提供一种用于通过在正交频分复用（OFDM）保护音上传送数据来增加无线通信设备之间的通信鲁棒性的方法和系统。 在一个实施例中，穿孔位在保护音上发送。 在替代实施例中，由保护音提供的用于确定最佳穿刺模式的全带宽。 本发明还可以使用保护音来从经历信道干扰的那些音调复制数据。 接收机反馈关于干扰中的音调的信息，并且发射机在保护音上发送被干扰的数据。 保护音用于向发射机发送反馈信息，以提高系统的鲁棒性。 这为发射机提供了有关如何使用保护音调和调整传输数据速率以使系统性能最大化的信息。