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1. 发明申请

US20080031374A1 BROADCAST TRANSMISSION WITH SPATIAL SPREADING IN A MULTI-ANTENNA COMMUNICATION SYSTEM 有权
公开(公告)号：US20080031374A1
公开(公告)日：2008-02-07
申请号：US11870386
申请日：2007-10-10
申请人： Jay Walton , John Ketchum , Mark Wallace , Steven Howard
发明人： Jay Walton , John Ketchum , Mark Wallace , Steven Howard
IPC分类号： H04L1/02
CPC分类号： H04L25/03866 , H04B7/043 , H04B7/0615 , H04B7/0669 , H04B7/0678 , H04B7/068 , H04B7/12 , H04L5/0007 , H04L25/0204 , H04L25/0224 , H04W52/42
摘要： An access point in a multi-antenna system broadcasts data using spatial spreading to randomize an “effective” channel observed by each user terminal for each block of data symbols broadcast by the access point. At the access point, data is coded, interleaved, and modulated to obtain ND data symbol blocks to be broadcast in NM transmission spans, where ND≧1 and NM>1. The ND data symbol blocks are partitioned into NM data symbol subblocks, one subblock for each transmission span. A steering matrix is selected (e.g., in a deterministic or pseudo-random manner from among a set of L steering matrices) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols, which are further processed and broadcast via NT transmit antennas and in one transmission span to user terminals within a broadcast coverage area.

2. 发明申请

US20080026797A1 APPARATUS AND METHOD FOR WIRELESS COMMUNICATION VIA AT LEAST ONE OF DIRECTIONAL AND OMNI-DIRECTION ANTENNAS 有权
标题翻译：用于无线通信的装置和方法，通过至少一个方向和OMNI-方向天线
公开(公告)号：US20080026797A1
公开(公告)日：2008-01-31
申请号：US11758578
申请日：2007-06-05
申请人： Sanjiv Nanda , Saishankar Nandagopalan , Santosh Abraham , Jay Walton , Ernest Ozaki
发明人： Sanjiv Nanda , Saishankar Nandagopalan , Santosh Abraham , Jay Walton , Ernest Ozaki
IPC分类号： H04M1/00
CPC分类号： H04B15/00 , H01Q1/246 , H01Q3/24 , H04B7/0602 , H04B7/0615 , H04B7/0842 , H04W16/28 , H04W28/18
摘要： Techniques for using at least one of omni-directional and directional antennas for communication are described. A station may be equipped antenna elements selectable for use as an omni-directional antenna or one or more directional antennas. The station may select the omni-directional antenna or a directional antenna for use for communication based on various factors such as, e.g., whether the location or direction of a target station for communication is known, whether control frames or data frames are being exchanged, etc.
摘要翻译：描述了使用全向和定向天线中的至少一个进行通信的技术。站可以配备可选择用作全向天线或一个或多个定向天线的天线元件。基站可以基于各种因素选择全向天线或定向天线，用于通信，例如，目的站通信的位置或方向是否已知，是否正在交换控制帧或数据帧，等等

3. 发明申请

US20070211814A1 DATA TRANSMISSION WITH SPATIAL SPREADING IN A MIMO COMMUNICATION SYSTEM 有权
标题翻译：数据传输与MIMO通信系统中的空间传播
公开(公告)号：US20070211814A1
公开(公告)日：2007-09-13
申请号：US11683736
申请日：2007-03-08
申请人： Jay Walton , John Ketchum , Mark Wallace , Steven Howard
发明人： Jay Walton , John Ketchum , Mark Wallace , Steven Howard
IPC分类号： H04L1/02
CPC分类号： H04B7/0417 , H04B7/0626 , H04B7/0678 , H04L1/0002 , H04L1/0003 , H04L1/0009 , H04L5/0023 , H04L25/0224
摘要： For data transmission with spatial spreading, a transmitting entity (1) encodes and modulates each data packet to obtain a corresponding data symbol block, (2) multiplexes data symbol blocks onto NS data symbol streams for transmission on NS transmission channels of a MIMO channel, (3) spatially spreads the NS data symbol streams with steering matrices, and (4) spatially processes NS spread symbol streams for full-CSI transmission on NS eigenmodes or partial-CSI transmission on NS spatial channels of the MIMO channel. A receiving entity (1) obtains NR received symbol streams via NR receive antennas, (2) performs receiver spatial processing for full-CSI or partial-CSI transmission to obtain NS detected symbol streams, (3) spatially despreads the NS detected symbol streams with the same steering matrices used by the transmitting entity to obtain NS recovered symbol streams, and (4) demodulates and decodes each recovered symbol block to obtain a corresponding decoded data packet.
摘要翻译：对于具有空间扩展的数据传输，发送实体（1）对每个数据分组进行编码和调制，以获得相应的数据符号块，（2）将数据符号块复用到N个S / S数据符号流上以便传输（3）用导向矩阵空间扩展N S S个数据符号流，并且（4）空间地处理N S S个数据符号流， / SUB>扩展符号流，用于N信道本征模式上的全CSI传输或MIMO信道的N SUB空间信道上的部分CSI传输。接收实体（1）通过N个N个接收天线获得接收到的N N个符号流，（2）执行用于全CSI或部分CSI传输的接收机空间处理，以获得（3）使用发送实体使用的相同导向矩阵空间地解扩N N S S个检测到的符号流，以获得N N个S＆lt; S＆lt; S＆lt; （4）对每个恢复的符号块进行解调和解码以获得对应的解码数据分组。

4. 发明申请

US20070206528A1 METHOD AND APPARATUS FOR INCREASING SPECTRUM USE EFFICIENCY IN A MESH NETWORK 有权
标题翻译：增加网络中频谱使用效率的方法和装置
公开(公告)号：US20070206528A1
公开(公告)日：2007-09-06
申请号：US11680065
申请日：2007-02-28
申请人： Jay Walton , Sanjiv Nanda
发明人： Jay Walton , Sanjiv Nanda
IPC分类号： H04Q7/00
CPC分类号： H04W74/0808 , H04W16/28 , H04W72/1231 , H04W84/18
摘要： Mesh Network Access Points (APs) points, including gateways and routers, are deployed over a geographic area. The APs monitor the communication channel for other carriers and transmit accordingly. The APs selectively co-transmit when other carriers are sensed, if the efficiency of the mesh network will improve. APs select a transmission rate based on observed carrier-to-interference ratios. APs use directional antennas to increase carrier-to-interference ratios and spectral efficiency. AP transmit schedules are adaptable and adjusted according to observed carrier-to-interference measurements.
摘要翻译：网络接入点（AP）点，包括网关和路由器，部署在一个地理区域。 AP监控其他运营商的通信信道，并进行相应的传输。当其他载波被感测到时，如果网状网络的效率将提高，则选择性地共同发射AP。 AP基于观察到的载波干扰比选择传输速率。 AP使用定向天线来增加载波干扰比和频谱效率。 AP发射时间表可以根据观测到的载波干扰测量进行适应性调整。

5. 发明申请

US20070116143A1 Reduced complexity detection and decoding for a receiver in a communication system 有权
标题翻译：降低通信系统中接收机的复杂度检测和解码
公开(公告)号：US20070116143A1
公开(公告)日：2007-05-24
申请号：US11345976
申请日：2006-02-01
申请人： Bjorn Bjerke , Irina Medvedev , John Ketchum , Mark Wallace , Jay Walton
发明人： Bjorn Bjerke , Irina Medvedev , John Ketchum , Mark Wallace , Jay Walton
IPC分类号： H04L23/02 , H04L1/02 , H03D1/00
CPC分类号： H04L27/2647 , H04L1/005 , H04L1/0052 , H04L1/06 , H04L25/03171 , H04L2025/03414 , H04L2025/03426
摘要： Techniques for performing detection and decoding at a receiver are described. In one scheme, the receiver obtains R received symbol streams for M data streams transmitted by a transmitter, performs receiver spatial processing on the received symbols to obtain detected symbols, performs log-likelihood ratio (LLR) computation independently for each of D best data streams, and performs LLR computation jointly for the M−D remaining data streams, where M>D≧1 and M>1. The D best data streams may be selected based on SNR and/or other criteria. In another scheme, the receiver performs LLR computation independently for each of the D best data streams, performs LLR computation jointly for the M−D remaining data streams, and reduces the number of hypotheses to consider for the joint LLR computation by performing a search for candidate hypotheses using list sphere detection, Markov chain Monte Carlo, or some other search technique.
摘要翻译：描述在接收机处执行检测和解码的技术。在一种方案中，接收机获得用于由发射机发送的M个数据流的R个接收符号流，对接收到的符号执行接收机空间处理以获得检测符号，对于每个D个最佳数据流独立地执行对数似然比（LLR）计算并且为MD剩余数据流共同执行LLR计算，其中M> D> = 1且M> 1。可以基于SNR和/或其他标准来选择D个最佳数据流。在另一方案中，接收机对于每个D最佳数据流独立地执行LLR计算，为MD剩余数据流共同执行LLR计算，并且通过执行候选假设的搜索来减少对于联合LLR计算考虑的假设的数量使用列表球体检测，马尔科夫链蒙特卡罗或其他搜索技术。

6. 发明申请

US20070064831A1 ITERATIVE DETECTION AND DECODING FOR A MIMO-OFDM SYSTEM 有权
标题翻译： MIMO-OFDM系统的迭代检测和解码
公开(公告)号：US20070064831A1
公开(公告)日：2007-03-22
申请号：US11557662
申请日：2006-11-08
申请人： Bjorn Bjerke , John Ketchum , Jay Walton
发明人： Bjorn Bjerke , John Ketchum , Jay Walton
IPC分类号： H04L1/02
CPC分类号： H04L1/005 , H04B7/0413 , H04B7/0854 , H04L1/0003 , H04L1/0009 , H04L1/0059 , H04L1/0066 , H04L1/0071 , H04L1/06 , H04L5/0023 , H04L25/03171 , H04L25/03305 , H04L25/03891 , H04L25/067 , H04L27/2647
摘要： Techniques to iteratively detect and decode data transmitted in a wireless (e.g., MIMO-OFDM) communication system. The iterative detection and decoding is performed by iteratively passing soft (multi-bit) “a priori” information between a detector and a decoder. The detector receives modulation symbols, performs a detection function that is complementary to the symbol mapping performed at the transmitter, and provides soft-decision symbols for transmitted coded bits. “Extrinsic information” in the soft-decision symbols is then decoded by the decoder to provide its extrinsic information, which comprises the a priori information used by the detector in the detection process. The detection and decoding may be iterated a number of times. The soft-decision symbols and the a priori information may be represented using log-likelihood ratios (LLRs). Techniques are provided to reduce the computational complexity associated with deriving the LLRs, including interference nulling to isolate each transmitted signal and “dual-maxima” approximation.
摘要翻译：用于迭代地检测和解码在无线（例如，MIMO-OFDM）通信系统中发送的数据的技术。迭代检测和解码通过在检测器和解码器之间迭代地传递软（多位）“先验”信息来执行。检测器接收调制符号，执行与在发射机处执行的符号映射互补的检测功能，并为发送的编码比特提供软判决符号。软判决符号中的“外在信息”然后由解码器解码以提供其外在信息，其包括检测器在检测过程中使用的先验信息。可以重复检测和解码多次。可以使用对数似然比（LLR）来表示软判决符号和先验信息。提供技术以减少与导出LLR相关联的计算复杂度，包括干扰归零以隔离每个发送的信号和“双最大值”近似。

7. 发明申请

US20070010248A1 Methods and devices for interworking of wireless wide area networks and wireless local area networks or wireless personal area networks 有权
标题翻译：无线广域网和无线局域网或无线个人区域网互通的方法和装置
公开(公告)号：US20070010248A1
公开(公告)日：2007-01-11
申请号：US11240725
申请日：2005-09-30
申请人： Subrahmanyam Dravida , Jay Walton , Sanjiv Nanda , Shravan Surineni
发明人： Subrahmanyam Dravida , Jay Walton , Sanjiv Nanda , Shravan Surineni
IPC分类号： H04Q7/20
CPC分类号： H04W84/18 , H04M7/0075 , H04W24/08 , H04W40/02 , H04W40/20 , H04W60/00 , H04W84/04 , H04W84/12 , H04W88/08 , H04W92/02
摘要： Embodiments describe registration in a wireless communication system. A method includes wirelessly transmitting over a WWAN a first registration message from a mobile device, wirelessly transmitting through the WWAN a second registration message to a WLAN access point and receiving at the mobile device access through the WLAN access point. According to another embodiment is a method for constructing a self-configuring ad-hoc network. The method can include receiving a GPS coordinate from a WWAN channel node at a management system and creating an initial topography based at least in part on the GPS coordinate to achieve a network connectivity with diverse routes between a plurality of nodes.
摘要翻译：实施例描述了在无线通信系统中的配准。一种方法包括通过WWAN无线地从移动设备发送第一注册消息，通过WWAN向WLAN接入点无线地发送第二注册消息，并在移动设备处接收通过WLAN接入点的接入。根据另一个实施例是用于构建自配置自组织网络的方法。该方法可以包括在管理系统处从WWAN信道节点接收GPS坐标并且至少部分地基于GPS坐标创建初始地形，以实现与多个节点之间的不同路由的网络连接。

8. 发明申请

US20070008925A1 Methods and devices for interworking of wireless wide area networks and wireless local area networks or wireless personal area networks 有权
标题翻译：无线广域网和无线局域网或无线个人区域网互通的方法和装置
公开(公告)号：US20070008925A1
公开(公告)日：2007-01-11
申请号：US11240045
申请日：2005-09-30
申请人： Subrahmanyam Dravida , Jay Walton , Sanjiv Nanda , Shravan Surineni
发明人： Subrahmanyam Dravida , Jay Walton , Sanjiv Nanda , Shravan Surineni
IPC分类号： H04Q7/00
CPC分类号： H04W36/30 , H04W36/14 , H04W36/36 , H04W88/06
摘要： Embodiments describe utilizing time-based information to improve communication in a wireless network. A method can include receiving beacon information from at least one access point and utilizing time-stamp information associated with the beacon information to determine whether to hand off communication with a second access point. According to other embodiments the method can further include detecting beacon quality is below a threshold level and transmitting a poor beacon quality message. Information relating to a plurality of alternate access points can be received in response to the transmitted poor beacon quality message.
摘要翻译：实施例描述了利用基于时间的信息来改善无线网络中的通信。一种方法可以包括从至少一个接入点接收信标信息，并利用与信标信息相关联的时间戳信息来确定是否切断与第二接入点的通信。根据其他实施例，该方法还可以包括检测信标质量低于阈值水平并发送不良信标质量消息。可以响应于所发送的差信标质量消息而接收与多个替代接入点相关的信息。

9. 发明申请

US20060291582A1 Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel inversion 有权
公开(公告)号：US20060291582A1
公开(公告)日：2006-12-28
申请号：US11478878
申请日：2006-06-30
申请人： Jay Walton , John Ketchum
发明人： Jay Walton , John Ketchum
IPC分类号： H04L1/02
CPC分类号： H04B7/0417 , H04B7/0439 , H04B7/0615 , H04B7/0632 , H04B7/0647 , H04B7/0891 , H04L1/0003 , H04L1/0009 , H04L1/0015 , H04L1/0019 , H04L1/0068 , H04L1/06 , H04L5/0023 , H04L5/0037 , H04L5/0044 , H04L5/0046 , H04L5/006 , H04L5/0091 , H04L5/023 , H04L5/06 , H04L25/0204 , H04L25/0228 , H04L25/0244 , H04L25/0248 , H04L25/03159 , H04L25/03343 , H04L27/2608 , H04L2001/0096 , H04L2025/03414 , H04L2025/03426 , H04L2025/03802 , H04W52/24 , H04W52/346 , H04W52/42
摘要： Techniques to process data for transmission over multiple transmission channels. The available transmission channels are segregated into one or more groups, and the channels in each group are selected for use for data transmission. Data for each group is coded and modulated based on a particular coding and modulation scheme to provide modulation symbols, and the modulation symbols for each selected channel are weighted based on an assigned weight. The weighting “inverts” the selected channels such that they achieve similar received SNRs. With selective channel inversion, only “good” channels in each group having SNRs at or above a particular threshold are selected, “bad” channels are not used, and the total available transmit power for the group is distributed across the good channels in the group. Improved performance is achieved by using only good channels in each group and matching each selected channel's received SNR to the required SNR.

10. 发明申请

US20060274820A1 Receiver for wireless communication network with extended range 有权
标题翻译：无线通信网络接收机，扩展范围
公开(公告)号：US20060274820A1
公开(公告)日：2006-12-07
申请号：US11224916
申请日：2005-09-12
申请人： Jay Walton , Mark Wallace
发明人： Jay Walton , Mark Wallace
IPC分类号： H04B1/00 , H04L27/06 , H04B1/707
CPC分类号： H04L1/0072 , H04B1/7073 , H04B1/7075 , H04L1/0045 , H04L25/0204 , H04L25/0216 , H04L25/0228 , H04L27/0006 , H04L27/0014 , H04L2027/0038 , H04L2027/0065 , H04L2027/0097
摘要： Techniques for detecting and demodulating a signal/transmission are described. Signal detection is performed in multiple stages using different types of signal processing, e.g., using time-domain correlation for a first stage, frequency-domain processing for a second stage, and time-domain processing for a third stage. For the first stage, products of symbols are generated for at least two different delays, correlation between the products for each delay and known values is performed, and correlation results for all delays are combined and used to declare the presence of a signal. For demodulation, the timing of input samples is adjusted to obtain timing-adjusted samples. A frequency offset is estimated and removed from the timing-adjusted samples to obtain frequency-corrected samples, which are processed with a channel estimate to obtain detected symbols. The phases of the detected symbols are corrected to obtain phase corrected symbols, which are demodulated, deinterleaved, and decoded.
摘要翻译：描述用于检测和解调信号/传输的技术。使用不同类型的信号处理，例如使用第一级的时域相关，第二级的频域处理，以及第三级的时域处理，来进行信号检测。对于第一阶段，对于至少两个不同的延迟生成符号的乘积，执行每个延迟的乘积和已知值之间的相关性，并且将所有延迟的相关结果组合并用于声明信号的存在。为了进行解调，调整输入样本的定时以获得经时间调整的样本。频率偏移被估计并从定时调整的样本中去除以获得频率校正的样本，其被采用信道估计来处理以获得检测到的符号。对检测到的符号的相位进行校正，以获得解调，解交织和解码的相位校正符号。

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