专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08446987B2 Downstream transmitter and cable modem receiver for 1024 QAM 有权
公开(公告)号：US08446987B2
公开(公告)日：2013-05-21
申请号：US12286337
申请日：2008-09-29
申请人： Yehuda Azenkot , Selim Shlomo Rakib
发明人： Yehuda Azenkot , Selim Shlomo Rakib
IPC分类号： H04L27/06
CPC分类号： H04L5/12 , H04L5/02 , H04L27/34
摘要： A headend transmitter that transmits 1024 QAM including a 256 QAM modulator which has been modified to have more aggressive forward error correction processing. The 256 QAM modulator outputs 256 QAM points to a summer. Another data modulator receives additional data to be transmitted in a separate, substantially less complex constellation. This modulator processes the additional data to do forward error correction thereon and then maps the encoded data into a less complex constellation such as QPSK, 16 QAM etc. The additional data constellation points are then amplified in a variable gain amplifier and fed to a summer where each additional data point is added by vector summation to one 256 QAM point. The output 1024 QAM point is filtered and shifted to the desired transmission frequency. Legacy cable modem receivers can still receive the 256 QAM point since the addition of the new data just appears to be noise which they can overcome using the parity bits encoded in the transmitted symbols. 1024 QAM cable modem receivers receive both the 256 QAM points and the new data points and output both.

2. 发明授权

US07239650B2 Apparatus and method for receiving upstream data transmissions from multiple remote transmitters 有权
标题翻译：用于从多个远程发射机接收上行数据传输的设备和方法
公开(公告)号：US07239650B2
公开(公告)日：2007-07-03
申请号：US09755339
申请日：2001-01-03
申请人： Selim Shlomo Rakib , Yehuda Azenkot
发明人： Selim Shlomo Rakib , Yehuda Azenkot
IPC分类号： H04J1/00 , H04J3/06
CPC分类号： H04W48/16 , H03M13/256 , H03M13/39 , H03M13/41 , H04B1/1027 , H04B1/707 , H04B1/7087 , H04B7/2668 , H04B2201/709709 , H04H20/77 , H04H20/78 , H04J3/0602 , H04J3/0608 , H04J3/0638 , H04J3/0682 , H04J13/00 , H04J13/004 , H04J14/007 , H04L1/006 , H04L1/16 , H04L5/023 , H04L5/026 , H04L5/06 , H04L7/041 , H04L12/2801 , H04L25/03057 , H04L25/03343 , H04L25/4921 , H04L27/0014 , H04L27/2656 , H04L27/2657 , H04L27/2662 , H04L27/362 , H04L2025/03414 , H04L2027/0083 , H04L2027/0087 , H04N7/10 , H04N7/17309 , H04N7/54 , H04N21/2221 , H04N21/2408 , H04N21/4305 , H04N21/4383 , H04W24/00 , H04W56/00 , H04W74/0866
摘要： A system for bidirectional communication of digital data between a central unit and a remote unit wherein the need for tracking loops in the central unit has been eliminated. The central unit transmitter generates a master carrier and a master clock signal which are used to transmit downstream data to the remote units. The remote units recover the master carrier and master clock and synchronize local oscillators in each remote unit to these master carrier and master clock signals to generate reference carrier and clock signals for use by the remote unit receiver. These reference carrier and clock signals are also used by the remote unit transmitters to transmit upstream data to the central unit. The central unit receiver detects the phase difference between the reference carrier and clock signals from the remote units periodically and adjusts the phase of the master carrier and master clock signals for use by the central unit receiver to receive the upstream data.
摘要翻译：已经消除了用于在中央单元和远程单元之间双向通信数字数据的系统，其中在中央单元中需要跟踪环路。中央单元发射机产生主载波和主时钟信号，用于将下行数据发送到远程单元。远程单元恢复主载波和主时钟，并将每个远程单元中的本地振荡器与这些主载波和主时钟信号同步，以生成参考载波和时钟信号供远程单元接收机使用。这些参考载波和时钟信号也被远程单元发射机用于将上行数据传输到中央单元。中央单元接收机周期性地检测来自远程单元的参考载波和时钟信号之间的相位差，并调整主载波和主时钟信号的相位，供中央单元接收机使用以接收上行数据。

3. 发明授权

US07580346B2 Method and apparatus to improve SCDMA headroom 有权
标题翻译：改善SCDMA净空的方法和装置
公开(公告)号：US07580346B2
公开(公告)日：2009-08-25
申请号：US11326225
申请日：2006-01-04
申请人： Yehuda Azenkot , Selim Shlomo Rakib
发明人： Yehuda Azenkot , Selim Shlomo Rakib
IPC分类号： H04J11/00
CPC分类号： H04N7/17309 , H04J13/16 , H04L5/0016 , H04L5/0048 , H04L25/0226
摘要： A method of determining when cable modems in a distributed digital data delivery service over cable TV hybrid fiber coaxial cable network have a headroom problem and resolving said problem. The method involves measuring the burst power from each cable modem, and if the burst power is too low, requesting the cable modem whose burst power is too low to increase its transmit power, and keeping track of which modems have been requested to increase their power. If a predetermined number of requests to increase power have not resulted in the cable modem transmitting with sufficient power for reliable reception, the cable modem is listed as having a headroom problem. Subsequent requests for upstream bandwidth from all modems with headroom problems are analyzed to determine if the requested burst size is too large and will result in a headroom problem. If so, a calculation as to the maximum number of spreading codes that each modem with a headroom problem can simultaneously transmit on without a headroom problem. The requested burst is then broken down into smaller burst fragments, and appropriate upstream minislot assignments adequate to transmit the burst fragments are made and sent to the cable modem.
摘要翻译：通过有线电视混合光纤同轴电缆网络确定分布式数字数据传送服务中的电缆调制解调器的方法具有余裕问题并解决所述问题。该方法包括测量每个电缆调制解调器的突发功率，并且如果突发功率太低，则请求其突发功率太低的电缆调制解调器，以增加其发射功率，并跟踪哪个调制解调器已被请求增加其功率。如果预定数量的增加功率的请求没有导致电缆调制解调器以足够的电力进行可靠的接收，则电缆调制解调器被列为具有净空问题。分析来自具有净空问题的所有调制解调器的上行带宽的后续请求，以确定所请求的突发大小是否太大并且将导致净空问题。如果是这样，对于具有净空问题的每个调制解调器的扩展码的最大数量的计算可以在没有余量问题的情况下同时发送。然后将所请求的突发分解成更小的突发片段，并且适当的用于发送突发片段的适当的上游小故障分配被发送并发送到电缆调制解调器。

4. 发明授权

US07095707B2 Apparatus and method for trellis encoding data for transmission in digital data transmission systems 有权
公开(公告)号：US07095707B2
公开(公告)日：2006-08-22
申请号：US09759842
申请日：2001-01-12
申请人： Selim Shlomo Rakib , Yehuda Azenkot
发明人： Selim Shlomo Rakib , Yehuda Azenkot
IPC分类号： H04J9/00
CPC分类号： H04W48/16 , H03M13/256 , H03M13/39 , H03M13/41 , H04B1/1027 , H04B1/707 , H04B1/7087 , H04B7/2668 , H04B2201/709709 , H04H20/77 , H04H20/78 , H04J3/0602 , H04J3/0608 , H04J3/0638 , H04J3/0682 , H04J13/00 , H04J13/004 , H04J14/007 , H04L1/006 , H04L1/16 , H04L5/023 , H04L5/026 , H04L5/06 , H04L7/041 , H04L12/2801 , H04L25/03057 , H04L25/03343 , H04L25/4921 , H04L27/0014 , H04L27/2656 , H04L27/2657 , H04L27/2662 , H04L27/362 , H04L2025/03414 , H04L2027/0083 , H04L2027/0087 , H04N7/10 , H04N7/17309 , H04N7/54 , H04N21/2221 , H04N21/2408 , H04N21/4305 , H04N21/4383 , H04W24/00 , H04W56/00 , H04W74/0866
摘要： A system for bidirectional communication of digital data between a central unit and a remote unit wherein the need for tracking loops in the central unit has been eliminated. The central unit transmitter generates a master carrier and a master clock signal which are used to transmit downstream data to the remote units. The remote units recover the master carrier and master clock and synchronize local oscillators in each remote unit to these master carrier and master clock signals to generate reference carrier and clock signals for use by the remote unit receiver. These reference carrier and clock signals are also used by the remote unit transmitters to transmit upstream data to the central unit. The central unit receiver detects the phase difference between the reference carrier and clock signals from the remote units periodically and adjusts the phase of the master carrier and master clock signals for use by the central unit receiver to receive the upstream data.

5. 发明授权

US07002899B2 Method and apparatus to improve SCDMA headroom 有权
公开(公告)号：US07002899B2
公开(公告)日：2006-02-21
申请号：US09974202
申请日：2001-10-09
申请人： Yehuda Azenkot , Selim Shlomo Rakib
发明人： Yehuda Azenkot , Selim Shlomo Rakib
IPC分类号： H04J11/00
CPC分类号： H04N7/17309 , H04J13/16 , H04L5/0016 , H04L5/0048 , H04L25/0226
摘要： A method of determining when cable modems in a distributed digital data delivery service over cable TV hybrid fiber coaxial cable network have a headroom problem and resolving said problem. The method involves measuring the burst power from each cable modem, and if the burst power is too low, requesting the cable modem whose burst power is too low to increase its transmit power, and keeping track of which modems have been requested to increase their power. If a predetermined number of requests to increase power have not resulted in the cable modem transmitting with sufficient power for reliable reception, the cable modem is listed as having a headroom problem. Subsequent requests for upstream bandwidth from all modems with headroom problems are analyzed to determine if the requested burst size is too large and will result in a headroom problem. If so, a calculation as to the maximum number of spreading codes that each modem with a headroom problem can simultaneously transmit on without a headroom problem. The requested burst is then broken down into smaller burst fragments, and appropriate upstream minislot assignments adequate to transmit the burst fragments are made and sent to the cable modem.

6. 发明授权

US06356555B1 Apparatus and method for digital data transmission using orthogonal codes 失效
标题翻译：使用正交码的数字数据传输的装置和方法
公开(公告)号：US06356555B1
公开(公告)日：2002-03-12
申请号：US08684243
申请日：1996-07-19
申请人： Selim Shlomo Rakib , Yehuda Azenkot
发明人： Selim Shlomo Rakib , Yehuda Azenkot
IPC分类号： H04B169
CPC分类号： H04H20/46 , H03M13/256 , H03M13/41 , H03M13/4169 , H03M13/6343 , H04B1/707 , H04B7/2668 , H04B2201/709709 , H04H20/78 , H04H60/97 , H04J13/00 , H04J13/0022 , H04J13/004 , H04J13/18 , H04J14/007 , H04L5/0016 , H04L5/06 , H04L12/2801 , H04L25/03343 , H04L27/362 , H04L2025/03414 , H04N7/10 , H04N7/17309 , H04N21/2383 , H04N21/2385 , H04N21/242 , H04N21/47202 , H04W4/18 , H04W28/24 , H04W28/26 , H04W48/16 , H04W52/0216 , H04W56/00 , H04W74/0866 , Y02D70/122 , Y02D70/124 , Y02D70/126 , Y02D70/144 , Y02D70/164 , Y02D70/166 , Y02D70/168 , Y02D70/26 , Y02D70/40 , Y02D70/449
摘要： A method and apparatus for carrying out synchronous co-division multiple access (SCDMA) communication of multiple channels of digital data over a shared transmission media such as a cable television system coaxial cable, a fiber optic or copper conductor telephone link, terrestial microwave, satellite link, local or wide area network, wireless including cellur network or some combination of these media using suitable interface circuitry. The system includes modems at remote units and a central unit to receive time division multiplexed digital data arranged into timeslots or channels and uses orthogonal codes to encode each channel of multiple data and spread the energy of each channel data over a frame of data transmitted in the code domain. Spreading the data this way makes the system less susceptible to impulse noise. Frames are synchronized as between remote and central units using a ranging scheme which is also useful in any other system transmitting data by frames in a distributed system where synchronizing the frames as between all units regardless of differences in propagation delays is necessary. Each frame in the SCDMA modulation scheme includes a gap or guardband containing no other data. The ranging process involves training each remote unit to impose enough delay prior to re-transmission of a barker code received from the CU such that a barker code sent by the RU arrives at the CU during the gap. The process of setting the delay in each RU is a trial and error process, and each RU starts the ranging process asynchronously. Contention resolution protocols such that only one RU is aligning to the gap at any particular time are taught.
摘要翻译：一种用于通过诸如有线电视系统同轴电缆，光纤或铜导体电话链路，陆地微波，卫星的共享传输介质进行多信道数字数据的同步并行多址（SCDMA）通信的方法和装置链路，本地或广域网，包括蜂窝网络的无线网络或使用合适的接口电路的这些媒体的某些组合。该系统包括远程单元的调制解调器和中央单元，用于接收布置在时隙或信道中的时分复用数字数据，并使用正交码来对多个数据的每个信道进行编码，并将每个信道数据的能量扩展到代码域。以这种方式传播数据使得系统不易受到脉冲噪声的影响。帧在远程和中央单元之间使用测距方案同步，该测距方案对于在分布式系统中以帧的方式传输数据的任何其他系统也是有用的，其中在不考虑传播延迟之间的差异的情况下，在所有单元之间同步帧。 SCDMA调制方案中的每个帧包括不包含其他数据的间隙或保护带。测距过程涉及训练每个远程单元以在重新发送从CU接收到的巴克码之前施加足够的延迟，使得由RU发送的巴克码在间隙期间到达CU。在每个RU中设置延迟的过程是一个试错过程，每个RU异步启动测距过程。教导了在任何特定时间只有一个RU与间隙对齐的竞争解决协议。

7. 发明授权

US5768269A Apparatus and method for establishing frame synchronization in distributed digital data communication systems 失效
标题翻译：在分布式数字数据通信系统中建立帧同步的装置和方法
公开(公告)号：US5768269A
公开(公告)日：1998-06-16
申请号：US519630
申请日：1995-08-25
申请人： Selim Shlomo Rakib , Yehuda Azenkot
发明人： Selim Shlomo Rakib , Yehuda Azenkot
IPC分类号： H03M13/25 , H03M13/41 , H04B1/707 , H04B7/26 , H04H60/97 , H04J3/06 , H04J11/00 , H04J13/00 , H04J14/00 , H04L5/02 , H04L5/06 , H04L7/04 , H04L12/28 , H04L25/03 , H04L27/36 , H04N7/173
CPC分类号： H04W48/16 , H04B1/707 , H04J13/00 , H04J13/004 , H04L12/2801 , H04L25/03343 , H04L27/362 , H04L5/023 , H04L5/026 , H04L5/06 , H04N7/17309 , H04B2201/709709 , H04H60/97 , H04J14/007 , H04L2025/03414 , H04L7/041 , H04W74/0866
摘要： A method and apparatus for carrying out synchronous codivision multiple access (SCDMA) communication of multiple channels of digital data over a shared transmission media such as a cable television system coaxial cable, a fiber optic or copper conductor telephone link, terrestial microwave, satellite link, local or wide area network, wireless including cellur network or some combination of these media using suitable interface circuitry. The system includes modems at remote units and a central unit to receive time division multiplexed digital data arranged into timeslots or channels and uses orthogonal codes to encode each channel of multiple data and spread the energy of each channel data over a frame of data transmitted in the code domain. Spreading the data this way makes the system less susceptible to impulse noise. Frames are synchronized as between remote and central units using a ranging scheme which is also useful in any other system transmitting data by frames in a distributed system where synchronizing the frames as between all units regardless of differences in propagation delays is necessary. Each frame in the SCDMA modulation scheme includes a gap or guardband containing no other data. The ranging process involves training each remote unit to impose enough delay prior to re-transmission of a barker code received from the CU such that a barker code sent by the RU arrives at the CU during the gap. The process of setting the delay in each RU is a trial and error process, and each RU starts the ranging process asynchronously. Contention resolution protocols such that only one RU is aligning to the gap at any particular time are taught.
摘要翻译：一种用于通过诸如有线电视系统同轴电缆，光纤或铜导体电话链路，陆地微波，卫星链路等共享传输介质进行多信道数字数据的同步多路复用（SCDMA）通信的方法和装置，本地或广域网，包括蜂窝网络的无线网络或使用合适的接口电路的这些媒体的某些组合。该系统包括远程单元的调制解调器和中央单元，用于接收布置在时隙或信道中的时分复用数字数据，并使用正交码来对多个数据的每个信道进行编码，并将每个信道数据的能量扩展到代码域。以这种方式传播数据使得系统不易受到脉冲噪声的影响。帧在远程和中央单元之间使用测距方案同步，该测距方案对于在分布式系统中以帧的方式传输数据的任何其他系统也是有用的，其中在不考虑传播延迟之间的差异的情况下，在所有单元之间同步帧。 SCDMA调制方案中的每个帧包括不包含其他数据的间隙或保护带。测距过程涉及训练每个远程单元以在重新发送从CU接收到的巴克码之前施加足够的延迟，使得由RU发送的巴克码在间隙期间到达CU。在每个RU中设置延迟的过程是一个试错过程，每个RU异步启动测距过程。教导了在任何特定时间只有一个RU与间隙对齐的竞争解决协议。

8. 发明授权

US08144800B2 Downstream transmitter and cable modem receiver for 1024 QAM 有权
标题翻译：下行发射机和电缆调制解调器接收机，用于1024 QAM
公开(公告)号：US08144800B2
公开(公告)日：2012-03-27
申请号：US10944962
申请日：2004-09-18
申请人： Yehuda Azenkot , Selim Shlomo Rakib
发明人： Yehuda Azenkot , Selim Shlomo Rakib
IPC分类号： H03C5/00 , H04B1/38
CPC分类号： H04L5/12 , H04L5/02 , H04L27/34
摘要： A headend transmitter that transmits 1024 QAM including a 256 QAM modulator which has been modified to have more aggressive forward error correction processing. The 256 QAM modulator outputs 256 QAM points to a summer. Another data modulator receives additional data to be transmitted in a separate, substantially less complex constellation. This modulator processes the additional data to do forward error correction thereon and then maps the encoded data into a less complex constellation such as QPSK, 16 QAM etc. The additional data constellation points are then amplified in a variable gain amplifier and fed to a summer where each additional data point is added by vector summation to one 256 QAM point. The output 1024 QAM point is filtered and shifted to the desired transmission frequency. Legacy cable modem receivers can still receive the 256 QAM point since the addition of the new data just appears to be noise which they can overcome using the parity bits encoded in the transmitted symbols. 1024 QAM cable modem receivers receive both the 256 QAM points and the new data points and output both.
摘要翻译：发送1024 QAM的前端发射机，包括已经被修改为具有更积极的前向纠错处理的256QAM调制器。 256个QAM调制器向夏季输出256个QAM点。另一数据调制器接收要在单独的，基本上较不复杂的星座中传送的附加数据。该调制器处理附加数据以在其上进行前向纠错，然后将编码的数据映射到诸如QPSK，16QAM等的较不复杂的星座图中。然后在可变增益放大器中对附加数据星座点进行放大并馈送到夏季，每个附加数据点通过向量求和相加到一个256个QAM点。输出1024 QAM点被滤波并移位到所需的传输频率。传统的电缆调制解调器接收机仍然可以接收256QAM点，因为新数据的添加似乎是可以使用在发送符号中编码的奇偶校验位来克服的噪声。 1024个QAM电缆调制解调器接收器接收256个QAM点和新的数据点，同时输出两个。

9. 发明授权

US07050419B2 Head end receiver for digital data delivery systems using mixed mode SCDMA and TDMA multiplexing 有权
公开(公告)号：US07050419B2
公开(公告)日：2006-05-23
申请号：US09792815
申请日：2001-02-23
申请人： Yehuda Azenkot , Paul Alan Lind , Michael Grimwood , Selim Shlomo Rakib
发明人： Yehuda Azenkot , Paul Alan Lind , Michael Grimwood , Selim Shlomo Rakib
IPC分类号： H04B7/212
CPC分类号： H04L27/0008 , H04L5/026 , H04L25/03006
摘要： A pipelined digital data receiver for a cable TV headend which is capable of receiving DOCSIS 1.0 or 1.1 or advanced PHY TDMA or SCDMA bursts having programmable symbol rates and programmable modulation types as well as a host of other burst parameters such at Trellis code modulation on or off, scrambling on or off, various values for Reed-Solomon T number and codeword length. The receiver has an RF section to filter and digitize incoming RF signals. It also has an input section to detect impulse noise and do match filtering and despread SCDMA bursts. A timing recovery section recovers the symbol clock and detects the start of bursts and collisions. A rotational amplifier and equalizer calculate and track gain, phase and frequency offsets and correct symbols and calculates equalization coefficients. A decoder section decodes TCM and non TCM bursts, and a Reed-Solomon decoder section reconstructs RS codewords and uses them to error correct the payload data.

10. 发明授权

US06937617B2 Apparatus and method for trellis encoding data for transmission in digital data transmission systems 失效
标题翻译：网格编码用于数字数据传输系统传输的数据的装置和方法
公开(公告)号：US06937617B2
公开(公告)日：2005-08-30
申请号：US09764739
申请日：2001-01-16
申请人： Selim Shlomo Rakib , Yehuda Azenkot
发明人： Selim Shlomo Rakib , Yehuda Azenkot
IPC分类号： H03M13/25 , H03M13/41 , H04B1/707 , H04B1/7087 , H04B7/26 , H04H20/77 , H04H20/78 , H04J3/06 , H04J11/00 , H04J13/00 , H04J14/00 , H04L1/00 , H04L1/16 , H04L5/02 , H04L5/06 , H04L7/04 , H04L12/28 , H04L12/56 , H04L25/03 , H04L25/49 , H04L27/00 , H04L27/26 , H04L27/36 , H04N7/173 , H04N21/222 , H04N21/24 , H04N21/43 , H04N21/438 , H04J1/00
CPC分类号： H04W48/16 , H03M13/256 , H03M13/39 , H03M13/41 , H04B1/1027 , H04B1/707 , H04B1/7087 , H04B7/2668 , H04B2201/709709 , H04H20/77 , H04H20/78 , H04J3/0602 , H04J3/0608 , H04J3/0638 , H04J3/0682 , H04J13/00 , H04J13/004 , H04J14/007 , H04L1/006 , H04L1/16 , H04L5/023 , H04L5/026 , H04L5/06 , H04L7/041 , H04L12/2801 , H04L25/03057 , H04L25/03343 , H04L25/4921 , H04L27/0014 , H04L27/2656 , H04L27/2657 , H04L27/2662 , H04L27/362 , H04L2025/03414 , H04L2027/0083 , H04L2027/0087 , H04N7/10 , H04N7/17309 , H04N7/54 , H04N21/2221 , H04N21/2408 , H04N21/4305 , H04N21/4383 , H04W24/00 , H04W56/00 , H04W74/0866
摘要： A system for bidirectional communication of digital data between a central unit and a remote unit wherein the need for tracking loops in the central unit has been eliminated. The central unit transmitter generates a master carrier and a master clock signal which are used to transmit downstream data to the remote units. The remote units recover the master carrier and master clock and synchronize local oscillators in each remote unit to these master carrier and master clock signals to generate reference carrier and clock signals for use by the remote unit receiver. These reference carrier and clock signals are also used by the remote unit transmitters to transmit upstream data to the central unit. The central unit receiver detects the phase difference between the reference carrier and clock signals from the remote units periodically and adjusts the phase of the master carrier and master clock signals for use by the central unit receiver to receive the upstream data.
摘要翻译：已经消除了用于在中央单元和远程单元之间双向通信数字数据的系统，其中在中央单元中需要跟踪环路。中央单元发射机产生主载波和主时钟信号，用于将下行数据发送到远程单元。远程单元恢复主载波和主时钟，并将每个远程单元中的本地振荡器与这些主载波和主时钟信号同步，以生成参考载波和时钟信号供远程单元接收机使用。这些参考载波和时钟信号也被远程单元发射机用于将上行数据传输到中央单元。中央单元接收机周期性地检测来自远程单元的参考载波和时钟信号之间的相位差，并调整主载波和主时钟信号的相位，供中央单元接收机使用以接收上行数据。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式