-
公开(公告)号：US10567458B2
公开(公告)日：2020-02-18
申请号：US15655288
申请日：2017-07-20
发明人： Udaya Bhaskar , Chi-Jiun Su
摘要： A system and method are provided for use with streaming blocks of data, each of the streaming blocks of data including a number bits of data. The system includes a first compressor and a second compressor. The first compressor can receive and store a number n blocks of the streaming blocks of data, can receive and store a block of data to be compressed of the streaming blocks of data, can compress consecutive bits within the block of data to be compressed based on the n blocks of the streaming blocks of data, can output a match descriptor and a literal segment. The match descriptor is based on the compressed consecutive bits. The literal segment is based on a remainder of the number of bits of the data to be compressed not including the consecutive bits. The second compressor can compress the literal segment and can output a compressed data block including the match descriptor and a compressed string of data based on the compressed literal segment.
-
公开(公告)号：US10305580B1
公开(公告)日：2019-05-28
申请号：US15890289
申请日：2018-02-06
发明人： Lin-Nan Lee , Udaya Bhaskar , Stanley Kay
IPC分类号： H04B7/185 , H04B7/0452 , H04B7/06 , H04B7/212 , H04B7/204
摘要： Signal precoding can include: determining a first antenna pattern gain for a beam directed from a first antenna feed on the satellite toward a first user terminal in a first cell and determining a second antenna pattern gain for a beam directed from a second antenna feed on the satellite toward a second user terminal in a second cell adjacent to the first cell; wherein the adjacent cells are partitioned into sectors; determining a first sector location of the first user terminal and a second sector location of the second user terminal; a precoder matrix circuit using the determined first and second antenna pattern gains to calculate a precoder matrix to reduce interference levels caused by the first signal at the second sector and by the second signal at the first sector; and the precoder matrix circuit applying the precoder matrix to the first and second signals.
-
公开(公告)号：US09166675B2
公开(公告)日：2015-10-20
申请号：US14265356
申请日：2014-04-29
发明人： Udaya Bhaskar , Yezdi Antia , Satyajit Roy
CPC分类号： H04B7/2048 , H04B7/18513 , H04B7/2125 , H04W56/001
摘要： Aspects of the invention provide a system and method to allow inroute frame timing synchronization without the aid of hub signal loopback or satellite ephemeris data. Furthermore, it allows tracking and compensating of the satellite motion to allow multiple remotes to use TDMA on the inroute frequencies, while minimizing the aperture. Two main techniques proposed are CLT and polling based approaches, which are used in combination for an optimum solution. In CLT based approach, hub transmits remote specific timing correction feedback messages on the outroute on as needed basis. In polling based approach, the remotes derive their timing based on a per-beam average delay estimate broadcast by the hub and a measured local delay specific to each outroute stream from a remote. An aspect of the invention uses triangulation method to determine satellite position. Furthermore, an aspect of the invention uses hub burst arrival method instead of polling approach.
摘要翻译： 本发明的方面提供了一种系统和方法，其允许在无需集线器信号环回或卫星星历数据的帮助下进行帧定时同步。 此外，它允许跟踪和补偿卫星运动，以允许多个遥控器在最小化孔径的同时使用TDMA在路由频率上。 提出的两个主要技术是基于CLT和轮询的方法，它们被组合用于最佳解决方案。 在基于CLT的方法中，集线器根据需要在远端传输远程特定定时校正反馈消息。 在基于轮询的方法中，遥控器基于由集线器广播的每个波束的平均延迟估计和来自远程的每个外向流特定的测量的本地延迟导出其定时。 本发明的一个方面使用三角测量方法来确定卫星位置。 此外，本发明的一个方面使用集线器突发到达方法而不是轮询方法。
-
公开(公告)号：US20240072884A1
公开(公告)日：2024-02-29
申请号：US17896784
申请日：2022-08-26
发明人： Udaya Bhaskar
IPC分类号： H04B7/185 , H04B7/0456 , H04W52/18
CPC分类号： H04B7/18513 , H04B7/0456 , H04W52/18
摘要： Techniques are described for precoded rate-splitting with multiple set-wise common messages for aggressive frequency reuse in a multi-beam satellites with co-channel interference. The satellite transmits private streams (PSs) to N user locations via spot beams. Embodiments identify K disjoint sets of the user locations (user groups) as being in adjacent spot beam coverage areas and having high channel vector collinearity. For each user group, data from the corresponding PSs is multiplexed to a respective set-wise common stream (SCS). PS precoders are each computed based on an associated target user location, and SCS precoders are each computed based on an associated target user group. The satellite allocates transmit power and transmits the N PSs and the K SCSs according to the PS beam weight vectors and the SCS beam weight vectors.
-
公开(公告)号：US20230141927A1
公开(公告)日：2023-05-11
申请号：US18148100
申请日：2022-12-29
发明人： Lin-Nan Lee , Udaya Bhaskar
CPC分类号： H04B7/18513 , H04B7/18515 , H04L45/64
摘要： Various arrangements for a satellite-based forward link overlay are presented herein. In some embodiments, broadband data is modulated at a particular frequency, phase, and/or timing to create a broadband data signal. The frequency, phase, and/or timing are used to modulate a low-bandwidth data signal. The low-bandwidth data signal can then be combined with the broadband data signal and transmitted via satellite to a geographic region. A low-bandwidth receiver unit may determine the frequency, phase, and/or timing from the embedded broadband signal and use such information to demodulate and despread the low-bandwidth data signal.
-
公开(公告)号：US10355778B1
公开(公告)日：2019-07-16
申请号：US15859580
申请日：2017-12-31
发明人： Anthony Noerpel , Udaya Bhaskar , Stanley Kay
摘要： A telecommunications platform comprises an antenna configured to generate a plurality of communications beams within a respective footprint on the surface of the Earth, wherein each communications beam provides data communications services over a respective cell coverage area on the surface of the Earth. The telecommunications platform further comprises a processor configured to control the plurality of communications beams of the antenna to form the respective cell coverage areas in a fixed cell pattern that remains essentially fixed relative to the surface of the Earth, such that, as the telecommunications platform travels through an orbit around the Earth, the footprint of the antenna sweeps across the fixed cell pattern and provides the communications services via the cell coverage areas of the fixed cell pattern that are within the footprint of the antenna at any given point in time.
-
公开(公告)号：US10057366B2
公开(公告)日：2018-08-21
申请号：US14986608
申请日：2015-12-31
发明人： Chi-Jiun Su , Udaya Bhaskar
IPC分类号： G06F5/16 , H04L29/08 , H04L29/06 , H04B7/185 , H04N21/433
CPC分类号： H04L67/2842 , H04B7/185 , H04B7/18523 , H04B7/18578 , H04L65/4069 , H04L65/4084 , H04L65/601 , H04L67/2852 , H04N21/23106 , H04N21/23439 , H04N21/433 , H04N21/44004 , H04N21/8456
摘要： An approach for cached content identification for adaptive data streaming. A first request is received, requesting a current segment from a sequence of segments from a data file of a streaming data session. A NewVideoFlag is determined as indicating that the sequence of segments associated with the first request is not currently being cached. The first request is forwarded to a content server, and a first response message is received. A SegmentID of the received content segment is determined as not matching that of cached content segments. The NewVideoFlag is set to indicate that the segments from the streaming data session file are currently being cached. A global cVideoFileID is generated identifying the streaming session data file being cached. The content segment is cached, and cache bookkeeping is updated to associate the segment with the SegmentID and the cVideoFileID. The first response message is provided to the client device.
-
公开(公告)号：US09680500B2
公开(公告)日：2017-06-13
申请号：US15176123
申请日：2016-06-07
发明人： Udaya Bhaskar , Chi-Jiun Su
CPC分类号： H03M7/3084 , H03M7/30 , H03M7/3059 , H03M7/3088 , H03M7/4006 , H04L69/04
摘要： Approaches for staged data compression are provided, where each stage reflects a progressive increase in granularity, resulting in a scalable approach that exhibits improved efficiency and compression performance. The first stage comprises a long-range block-level compressor that determines redundancies on a block-level basis (based on entire data blocks, as opposed to partial segments within data blocks). The second stage comprises a long-range byte-level compressor that compresses an uncompressed block based on byte segments within the block that match previously transmitted segments. The duplicate segments are replaced with pointers to matching segments within a decompressor cache. Nonmatching segments of the data block are left uncompressed and passed to a third stage short-range compressor (e.g., a grammar-based compressor). The staged progression in granularity provides advantages of maximizing the compression gain while minimizing processing and storage requirements of the compressor and decompressor.
-
公开(公告)号：US11711140B2
公开(公告)日：2023-07-25
申请号：US17136821
申请日：2020-12-29
发明人： Stan Kay , Udaya Bhaskar
CPC分类号： H04B7/18541 , H04W36/0058 , H04W36/22
摘要： An apparatus and method are disclosed for mitigating pointing errors resulting from satellite antennas. Reports are received from terminals in a beam hopping satellite communication system, and a pointing error associated with a satellite antenna is determined. The best beam for communicating with each terminal is selected based on the pointing error. A beam list containing the instantaneous traffic demand of terminals for each beam in the system is generated. An active beam set is then selected from the beam list for transmitting data during the next hop in the satellite communication system.
-
10.发明授权Data compression for priority based data traffic, on an aggregate traffic level, in a multi stream communications system 有权在多流通信系统中，在聚合流量级别上的基于优先级的数据业务的数据压缩公开(公告)号：US09479383B2
公开(公告)日：2016-10-25
申请号：US14215043
申请日：2014-03-16
发明人： Udaya Bhaskar , Douglas Dillon
CPC分类号： H04L69/04 , H03M7/3084 , H03M7/3088 , H03M7/4006 , H04L29/0604 , H04L65/608 , H04L69/22 , H04L69/324 , H04L69/326
摘要： An approach for multi-stream data compression comprises receiving packets of a data stream, wherein the packets comprise respective packets of source data streams compressed on an aggregate basis and in a successive order. A one of the packets is decompressed, and a determination is made whether the packet has been received in a proper order of succession compared to the successive order of compression. When it is determined that the packet has been received in the proper order, the packet is stored at a next location in a decompressor cache. When it is determined that the packet has not been received in the proper order, the packet is stored at a location in the decompressor cache, allowing for subsequent storage of one or more further packets in the proper order of succession, wherein the further packets were processed via the compression process before, but were received after, the one packet.
摘要翻译： 用于多流数据压缩的方法包括接收数据流的分组，其中所述分组包括基于聚合和依次顺序压缩的源数据流的相应分组。 解压缩一个分组，并且确定与连续的压缩顺序相比，分组是否以适当的连续顺序被接收。 当确定分组已经以适当的顺序被接收时，分组被存储在解压缩器高速缓存中的下一个位置处。 当确定分组没有以适当的顺序被接收时，分组被存储在解压缩器高速缓存中的位置处，允许以适当的继续顺序后续存储一个或多个另外的分组，其中进一步的分组是 经过压缩处理之前被处理，但之后被接收到一个数据包。
-
-
-
-
-
-
-
-
-
搜索结果
18 条记录 (耗时 0.019 秒)
