-
公开(公告)号：US20190013892A1
公开(公告)日：2019-01-10
申请号：US15643418
申请日：2017-07-06
发明人： Liping Chen , Lin-Nan Lee , Bassel F. Beidas , Donglei Fan
摘要： A transmitter, including a signal processor programmed to generate, based on input serial data, for each of an integer number of subcarriers mutually orthogonal to each other, a respective first parallel data stream. The signal processor is further programmed to modulate each of the integer number of subcarriers respectively with the respective parallel stream to generate the integer number of data-modulated subcarriers. The signal processor is further programmed to modulate a single carrier occupying a same bandwidth as the integer number of subcarriers with a unique word and one or more pilot symbols to generate a second signal. The signal processor combines the first signal and second signal to generate a third signal. The signal processor generates an output signal by applying a transmit filter to the third signal.
-
12.发明授权Method and apparatus for wireless data transmission subject to periodic signal blockages 有权用于无线数据传输的方法和装置，受到周期性信号阻塞公开(公告)号：US09397704B2
公开(公告)日：2016-07-19
申请号：US14685854
申请日：2015-04-14
发明人： Mustafa Eroz , Lin-Nan Lee
CPC分类号： H03M13/2792 , H03M13/1102 , H03M13/25 , H03M13/27 , H03M13/271 , H03M13/29 , H03M13/2906 , H03M13/2936 , H03M13/2957 , H03M13/2966 , H03M13/373 , H03M13/6561 , H04B7/18506 , H04L1/0009 , H04L1/004 , H04L1/0041 , H04L1/0042 , H04L1/0057 , H04L1/0061 , H04L1/0071
摘要： Approaches for satellite data transmissions are provided, which accommodate for periodic signal blockages without packet loss. A data stream is segmented into packets for wireless transmission, wherein the transmission is subject to a periodic blockage, wherein the periodic blockage comprises two blockages occurring within a time period, and each blockage is of a respective duration and recurs at regular intervals based on the time period. A forward error correction outer code is applied to the packets for recovery of data erasures due to the periodic blockage, wherein the application of the outer code comprises applying an error correction code to each of the packets to generate a respective codeblock. Each codeblock is interleaved to prevent erasure of consecutive parity bits within the codeblock. The encoded and interleaved codeblocks are transmitted over a wireless channel, wherein a number of data erasures occur within each codeblock due to the periodic blockage.
摘要翻译： 提供了用于卫星数据传输的方法，其适应周期性信号阻塞而没有丢包。 数据流被分段成用于无线传输的分组，其中传输遭受周期性阻塞，其中周期性阻塞包括在一段时间内发生的两个阻塞，并且每个阻塞具有相应的持续时间，并且基于 时间段。 前向纠错外码被应用于由于周期性阻塞而恢复数据擦除的分组，其中外码的应用包括对每个分组应用纠错码以生成相应的码块。 每个码块被交织以防止擦除码块内的连续奇偶校验位。 编码和交织的码块通过无线信道发送，其中由于周期性的阻塞，在每个码块内发生多个数据擦除。
-
13.发明授权公开(公告)号：US09118353B2
公开(公告)日：2015-08-25
申请号：US14601182
申请日：2015-01-20
发明人： Mustafa Eroz , Lin-Nan Lee
CPC分类号： H03M13/6393 , H03M13/005 , H03M13/1102 , H03M13/1105 , H03M13/1137 , H03M13/116 , H03M13/1165 , H03M13/255 , H03M13/618 , H03M13/6356 , H03M13/6362 , H03M13/6516 , H04L1/0057 , H04L1/0068
摘要： The present invention provides an approach for FEC encoding based on intermediate code block lengths not associated with any supported mother FEC code. A first string of k2 data bits is received. The first string of data bits is encoded to generate an N2 bit code block for transmission over a channel of a wireless communications network. The first data bit string is encoded based on a supported (N1,k1) forward error correction (FEC) code of a code rate R=k1/N1, configured to encode a string of data bits of a length k1 bits to generate a code block of a length N1 bits. To facilitate the encoding of the first string of data bits based on the (N1,k1) FEC code, the encoding comprises padding, repeating and/or puncturing the first string of data bits and a resulting N1 bit code block to generate the N2 bit code block.
摘要翻译： 本发明提供了一种基于与任何支持的母版FEC码不相关联的中间码块长度的FEC编码方法。 接收第一串k2数据位。 第一串数据位被编码以产生用于在无线通信网络的信道上传输的N2比特码块。 基于码率R = k1 / N1的支持的（N1，k1）前向纠错（FEC）码，编码第一数据比特串，被配置为对长度为k1比特的数据比特串进行编码，以生成码 长度为N1位的块。 为了便于基于（N1，k1）FEC码的第一串数据位的编码，编码包括填充，重复和/或删截第一数据比特串，并产生N1比特码块以产生N2比特 代码块。
-
14.发明授权PLS header coding for efficient signaling of modulation and coding schemes for broadband satellite communications systems 有权用于宽带卫星通信系统的调制和编码方案的有效信令的PLS报头编码公开(公告)号：US08964896B2
公开(公告)日：2015-02-24
申请号：US13896275
申请日：2013-05-16
发明人： Lin-Nan Lee , Mustafa Eroz , Neal Becker
IPC分类号： H03C3/00 , H04L12/741 , H04W72/04
CPC分类号： H04L45/74 , H04L1/0029 , H04W72/04
摘要： An approach is provided for an improved coding approach for efficient header signaling in broadband communications networks, to provide support of expanded modulation and coding scheme sets that facilitate an expansion of the operational ranges of user terminals within such networks and finer granularity within such operational ranges. A mode indicator field of a frame header identifies a modulation/coding mode applied to a data payload of the data frame. The modulation/coding mode is one of either a first or second set of modulation/coding modes. The mode indicator field is encoded and modulated. When the modulation/coding mode is one of the first set, the modulation of the encoded mode indicator field is applied in a first mode, and when the modulation/coding mode is one of the second set, the modulation of the encoded mode indicator field is applied in a second mode.
摘要翻译： 提供了一种用于在宽带通信网络中有效的报头信令的改进的编码方法的方法，以提供对扩展的调制和编码方案组的支持，这些扩展的调制和编码方案组有助于扩展这些网络内的用户终端的操作范围，并且在这些操作范围内更细的粒度。 帧头的模式指示符字段标识应用于数据帧的数据有效载荷的调制/编码模式。 调制/编码模式是第一组或第二组调制/编码模式之一。 模式指示符字段被编码和调制。 当调制/编码模式是第一组之一时，以第一模式应用编码模式指示符字段的调制，并且当调制/编码模式是第二组中的一个时，编码模式指示符字段的调制 以第二模式应用。
-
公开(公告)号：US11569903B2
公开(公告)日：2023-01-31
申请号：US17135378
申请日：2020-12-28
发明人： Lin-Nan Lee , Udaya Bhaskar
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：US20220209851A1
公开(公告)日：2022-06-30
申请号：US17137269
申请日：2020-12-29
发明人： Liping Chen , Rohit Iyer Seshadri , Mustafa Eroz , Lin-Nan Lee , Stan Kay
摘要： Various arrangements for performing transmodulation of a forward feeder link are presented. A first data stream and a second data stream can be modulated into a higher-order modulation forward feeder link having a higher-order digital modulation scheme. A satellite can receive the higher-order modulation forward feeder link. The satellite can demodulate the higher-order modulator forward feeder link into a bit stream. This bit stream may then be remodulated and retransmitted as multiple forward user links.
-
17.发明授权公开(公告)号：US11251892B2
公开(公告)日：2022-02-15
申请号：US16530974
申请日：2019-08-02
发明人： Lin-Nan Lee , Neal D. Becker , Mustafa Eroz
摘要： Systems and methods are described, and one method includes allocate a continuous duration within a TDMA scheme, for asynchronous NOMA transmissions, and extending from an allocation start time to an allocation termination time, formed of contiguous time slots of the TDMA scheme, and included providing to asynchronous NOMA user terminals an indication of the allocation start time and termination time, indicating allowance to perform asynchronous NOMA transmissions within a start time constraint that starts of the asynchronous NOMA transmissions do not precede the allocation start time, and terminations of the asynchronous NOMA transmissions do not succeed the allocation termination time.
-
公开(公告)号：US10763993B2
公开(公告)日：2020-09-01
申请号：US16010526
申请日：2018-06-18
发明人： Mustafa Eroz , Lin-Nan Lee
摘要： Methods and apparatus for increasing spectral efficiency in non-orthogonal multiple access (NOMA) communication, that implement receiving a signal stream from a user, splitting the signal stream into a plurality of sub-streams, applying a forward error coding (FEC) to each one of the sub-streams, and outputting a corresponding plurality of FEC encoded sub-streams. This can include modulating a corresponding carrier with each of the FEC encoded sub-streams, and combining and transmitting the corresponding plurality of modulated carrier signals. The modulated carrier signals can each carry a respective one of the FEC encoded sub-streams.
-
公开(公告)号：US10727949B2
公开(公告)日：2020-07-28
申请号：US16237358
申请日：2018-12-31
摘要： Techniques for data transmission including receiving, at a geostationary earth orbiting satellite, forward-direction user data via a forward optical link; transmitting, by the geostationary earth orbiting satellite via multiple radio frequency (RF) spot beams, the forward-direction user data received via the forward optical link; receiving, at a stratospheric high-altitude communication device, forward-direction user data via multiple concurrent forward RF feeder links; transmitting, by the stratospheric high-altitude communication device via the forward optical link, the forward-direction user data received via the forward RF feeder links; transmitting, by each of multiple ground-based feeder RF terminals at a same RF feeder site, a respective one of the forward RF feeder links. At least 95% of forward feeder data throughput for all of the forward RF service link transmissions by the satellite is carried via the forward optical link and the forward RF feeder links.
-
公开(公告)号：US10609175B2
公开(公告)日：2020-03-31
申请号：US14986318
申请日：2015-12-31
发明人： Chi-Jiun Su , Lin-Nan Lee
IPC分类号： H04L29/08 , H04B7/185 , H04N21/658 , H04N21/6405 , H04N21/845 , H04N21/433 , H04L29/06 , H04H20/40 , H04H20/42 , H04N21/262 , H04H20/26 , H04H20/08
摘要： An approach for opportunistic caching of streaming media data is provided to facilitate efficient use of forward transmission resources of a broadband communications system. The approach includes receiving, by a second communications terminal, a first content response transmitted by a first content server, via a broadcast/multicast communications medium, in response to a first content request of a first client device associated with a first communications terminal, wherein the first content response includes first data content requested by the first client device via the first communications terminal. The approach further comprises determining, by a cache controller of a cache storage device of the second communications terminal, to store at least the first data content of the first content response in the local cache storage device associated with the second communications terminal, wherein the determination to store is based on one or more criteria associated with the first content response.
-
-
-
-
-
-
-
-
-
搜索结果
58 条记录 (耗时 0.019 秒)
