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公开(公告)号：US10667079B2
公开(公告)日：2020-05-26
申请号：US15224585
申请日：2016-07-31
发明人： Paul D Alexander , Paul K Gray , Steve Statler
摘要： A virtual beacon system that provides proximity alerts is described. The proximity alerts are based on the location of a mobile device (100) and a location of interest. The method may include the steps of providing sensor readings for signals, calculating a mobile device location, determining the distance between a mobile device and a product location (202) and generating a proximity trigger (208). A described virtual beacon system includes a monitoring access point (104) for providing sensor readings and transmitting proximity triggers, a location cloud service (106) for calculating a mobile device (100) location and proximity alert service (108) for generating proximity triggers based on the mobile device location.
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公开(公告)号：US10193659B2
公开(公告)日：2019-01-29
申请号：US15362364
申请日：2016-11-28
发明人： Paul Dean Alexander
IPC分类号： H04L27/06 , H03K9/00 , H03D1/00 , H04L1/00 , H04L25/02 , H03M13/41 , H03M13/00 , H04L25/03 , H04L27/26 , H03M13/11 , H03M13/29 , H04L1/20
摘要： The present invention relates to a method and apparatus for channel estimation between a transmitter and a receiver in a wireless communications system. In one arrangement, the method comprises: receiving at the receiver a first sequence of bits representing a first sequence of coded symbols transmitted over the communications channel; decoding the first sequence of coded symbols using maximum-likelihood based decoding including: generating traceback outcomes by tracing backwards the first sequence of bits through a maximum-likelihood based traceback path, the traceback outcomes including a first portion associated with a first traceback depth and a second portion associated with a second traceback depth that is deeper than the first traceback depth; generating a channel estimate of the communications channel based on the first portion of the traceback outcomes; and generating an estimate of at least some information bits coded in the first sequence of coded symbols based on the second portion of the traceback outcomes.
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公开(公告)号：US20140349601A1
公开(公告)日：2014-11-27
申请号：US14453516
申请日：2014-08-06
CPC分类号： H04L25/022 , H04B1/10 , H04B1/16 , H04L25/0224 , H04L25/03159 , H04L27/2647
摘要： Methods and apparatus are described for processing data in a wireless communication network. Iterative estimation techniques are used to enable tracking of time-varying communication channels. A signal is transmitted over a channel in the network, the signal comprising a sequence of symbols carried on a plurality of sub-carriers. Boot-up estimator estimates, in a time domain, parameters of a model of the channel based on the received signal. A domain converter transforms at least one of the estimated parameters from the time domain to provide at least one transformed parameter in a second domain. An equalizer and decoder determine estimates of symbols from the received signal using the at least one transformed parameter, and tracking estimator updates the estimated model parameters during reception of the signal using at least one estimated symbol.
摘要翻译： 描述了用于在无线通信网络中处理数据的方法和装置。 使用迭代估计技术来跟踪时变通信信道。 信号通过网络中的信道发送，该信号包括在多个子载波上承载的码元序列。 引导估计器在时域中估计基于接收信号的信道模型的参数。 域转换器从时域转换估计参数中的至少一个，以在第二域中提供至少一个变换参数。 均衡器和解码器使用至少一个变换参数确定来自接收信号的符号的估计，并且跟踪估计器使用至少一个估计符号在接收信号期间更新估计的模型参数。
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公开(公告)号：US20200077238A1
公开(公告)日：2020-03-05
申请号：US16557554
申请日：2019-08-30
发明人： Paul Dean Alexander , Malik Khan , John Lawrence Buetefuer , Mohamed Elbanhawi , Kukulage Nomal Samunda Perera , Lachlan Travis Robinson
摘要： Methods and systems for estimating the position of an object such (as a vehicle) are disclosed. The method comprises transmitting a first V2X message from the object to a plurality of spaced apart units; and receiving a set of V2X response messages from at least two units in response to the first V2X message. Each response message comprises an identifier of the object, an identifier of the unit from which the response message was sent, and temporal information associated with the times of receiving a previous V2X message at the unit and transmitting a previous V2X response message from the unit. The position of the object is estimated based on the information contained in the set of V2X response messages and the times of transmitting the previous V2X message from the object and receiving the previous set of V2X response messages at the object.
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公开(公告)号：US09985744B2
公开(公告)日：2018-05-29
申请号：US15219962
申请日：2016-07-26
发明人： Paul Dean Alexander
摘要： Described herein is a wireless receiver configured to receive wireless signals containing data packets transmitted according to an undetermined communications protocol selected from at least a first communications protocol and a second communications protocol. Without necessarily decoding the data packets, for example according to either the first or the second communication protocol, the described wireless receiver is able to concurrently detect presence of signal transmission in the first communications protocol or the second communications protocol. In some arrangements, the described wireless receiver may be configured to differentiate between the first communications protocol and the second communications protocol. The ability of the wireless receiver to detect presence of signal transmission by other wireless devices may provide intelligence to an associated wireless transmitter of any concurrent signal transmission so as to minimize interference.
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公开(公告)号：US20160099816A1
公开(公告)日：2016-04-07
申请号：US14845551
申请日：2015-09-04
发明人： Paul Dean Alexander , Paul Kingsley Gray , David Victor Lawrie Haley , John Lawrence Buetefuer , Alexander James Grant , Phuc Ngoc Pham , Joshua Charles Sutton , Martin Suter
CPC分类号： H04L25/0202 , H04L1/0045 , H04L1/0047 , H04L1/0048 , H04L1/0054 , H04L1/0059 , H04L25/0204 , H04L25/022 , H04L25/0224 , H04L25/03318 , H04L27/2647
摘要： Methods and apparatus are described for improving receiver performance in a multicarrier communication network in which an encoded symbol is transmitted over a transmission channel in the communications system. A model of the transmission channel is estimated, said model characterising an effect of intercarrier interference on at least one carrier in the multicarrier system. The received symbol is decoded using the estimated model to remove a predicted effect of intercarrier interference. A pre-processor is also described for operation in conjunction with a communications receiver in the network. The pre-processor includes a channel estimator operable to estimate at least one feature of the communication channel based on a received signal. The pre-processor modifies the received signal dependent on the at least one estimated feature and provides the modified signal to the communications receiver.
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公开(公告)号：US10979876B2
公开(公告)日：2021-04-13
申请号：US16557554
申请日：2019-08-30
发明人： Paul Dean Alexander , Malik Khan , John Lawrence Buetefuer , Mohamed Elbanhawi , Kukulage Nomal Samunda Perera , Lachlan Travis Robinson
摘要： Methods and systems for estimating the position of an object such (as a vehicle) are disclosed. The method comprises transmitting a first V2X message from the object to a plurality of spaced apart units; and receiving a set of V2X response messages from at least two units in response to the first V2X message. Each response message comprises an identifier of the object, an identifier of the unit from which the response message was sent, and temporal information associated with the times of receiving a previous V2X message at the unit and transmitting a previous V2X response message from the unit. The position of the object is estimated based on the information contained in the set of V2X response messages and the times of transmitting the previous V2X message from the object and receiving the previous set of V2X response messages at the object.
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公开(公告)号：US20190141475A1
公开(公告)日：2019-05-09
申请号：US15224585
申请日：2016-07-31
发明人： Paul D Alexander , Paul K Gray , Steve Statler
摘要： A virtual beacon system that provides proximity alerts is described. The proximity alerts are based on the location of a mobile device (100) and a location of interest. The method may include the steps of providing sensor readings for signals, calculating a mobile device location, determining the distance between a mobile device and a product location (202) and generating a proximity trigger (208). A described virtual beacon system includes a monitoring access point (104) for providing sensor readings and transmitting proximity triggers, a location cloud service (106) for calculating a mobile device (100) location and proximity alert service (108) for generating proximity triggers based on the mobile device location.
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公开(公告)号：US08964865B2
公开(公告)日：2015-02-24
申请号：US13733618
申请日：2013-01-03
CPC分类号： H04L25/0202 , H04L25/0204 , H04L25/03171 , H04L27/2657 , H04L27/2662 , H04L27/2675
摘要： A method is for communicating by tracking time varying channels in a multiple access packet based communication network. Each packet includes a preamble portion including a data symbol, and a data portion including data symbols. The method may include initializing a channel estimate reference from an initial channel estimate based upon the data symbol in a preamble portion of a received packet, and updating the channel estimate reference based upon a channel estimate of a current data symbol and a previously received data symbol from the data symbols in a data portion of the received packet. The method may also include repeating the updating upon receipt of a subsequent data symbol from the data symbols in the data portion of the received packet.
摘要翻译： 一种通过在基于多址接入分组的通信网络中跟踪时变信道进行通信的方法。 每个分组包括包括数据符号的前同步码部分和包括数据符号的数据部分。 该方法可以包括基于接收到的分组的前导部分中的数据符号从初始信道估计初始化信道估计参考，以及基于当前数据符号和先前接收的数据符号的信道估计来更新信道估计参考 来自接收到的分组的数据部分中的数据符号。 该方法还可以包括在从接收到的分组的数据部分中的数据符号接收到后续数据符号时重复更新。
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公开(公告)号：US20190294966A1
公开(公告)日：2019-09-26
申请号：US16364733
申请日：2019-03-26
发明人： Malik Khan , Mohamed Elbanhawi
摘要： A method for automatically training a neural network is disclosed. The method including: at a trainer having a first communication device and a perception recorder, continuously recording the surroundings in the vicinity of the first object; receiving, at the trainer, a message from a communication device associated with an object in the vicinity of the trainer, the message including information about the position and the type of the object; identifying a recording corresponding to the time at which the message is received from the object; correlating the received positional information about the second object with a corresponding location in the recording to identify the object in the recording; classifying the identified object based on the type of information received in the message from the object; and using the classified recording to train the neural network.
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