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. 发明申请

WO2004040403A3 LOWER COMPLEXITY LAYERED MODULATION SIGNAL PROCESSOR 审中-公开
标题翻译：低复杂度层状调制信号处理器
公开(公告)号：WO2004040403A3
公开(公告)日：2004-07-22
申请号：PCT/US0332264
申请日：2003-10-10
申请人： DIRECTV GROUP INC , CHEN ERNEST C , WANG WEIZHENG , ZHOU GUANGCAI , LIN TUNG-SHENG , SANTORU JOSEPH
发明人： CHEN ERNEST C , WANG WEIZHENG , ZHOU GUANGCAI , LIN TUNG-SHENG , SANTORU JOSEPH
IPC分类号： H03F1/32 , H03F3/58 , H04B1/707 , H04B7/185 , H04B14/04 , H04B17/00 , H04L20060101 , H04L27/34 , H04L27/36 , H04L29/06 , H04N5/21
CPC分类号： H04L27/3488 , H04B7/18515 , H04B17/318 , H04L1/20 , H04L27/183 , H04L27/227 , H04L27/366 , H04L2027/0061
摘要： A method and apparatus for transmitting and receiving a coded signal having an upper layer signal (130) and a lower layer signal (1312) is disclosed. The method comprises the steps of combining the upper layer signal and the lower layer signal, encoding the combined upper layer signal and lower layer signal, delaying the upper layer signal, modulating the delayed upper layer signal, modulating the lower layer signal, transmitting the delayed upper layer signal and transmitting the lower layer signal. The apparatus comprises an encoder (1301), for encoding a combined upper layer signal and lower layer signal, a delay communicatively coupled to the encoder, for delaying the upper layer signal, a first modulator, for modulating the upper layer signal, a second modulator, for modulating the lower layer signal, a transmitter (1314), communicatively coupled to the first modulator, for transmitting the delayed upper layer signal, and a second transmitter (13, 16), communicatively coupled to the second modulator.
摘要翻译：公开了一种用于发送和接收具有上层信号（130）和下层信号（1312）的编码信号的方法和装置。该方法包括以下步骤：组合上层信号和下层信号，编码组合上层信号和下层信号，延迟上层信号，调制延迟的上层信号，调制下层信号，发送延迟的上层信号并传输下层信号。该装置包括编码器（1301），用于对组合的上层信号和下层信号进行编码，通信地耦合到编码器的延迟用于延迟上层信号的第一调制器，用于调制上层信号的第二调制器，用于调制所述下层信号;通信地耦合到所述第一调制器的用于发送所述延迟的上层信号的发射机（1314）以及通信地耦合到所述第二调制器的第二发射机（13,16）。

2. 发明申请

WO2005022758A2 SIMPLIFIED SCRAMBLING SCHEME FOR SATELLITE BROADCASTING SYSTEMS 审中-公开
标题翻译：用于卫星广播系统的简化扫描方案
公开(公告)号：WO2005022758A2
公开(公告)日：2005-03-10
申请号：PCT/US2004027981
申请日：2004-08-27
申请人： DIRECTV GROUP INC , CHEN ERNEST C , LAI DENNIS , LIN TUNG-SHENG , LINDSEY WILLIAM C , MAITRA SHAMIK , SANTORU JOSEPH , ZHOU GUANGCAI
发明人： CHEN ERNEST C , LAI DENNIS , LIN TUNG-SHENG , LINDSEY WILLIAM C , MAITRA SHAMIK , SANTORU JOSEPH , ZHOU GUANGCAI
IPC分类号： H04B20060101 , H04B7/185 , H04L25/03 , H04L27/36 , H04B
CPC分类号： H04L25/03866 , H04B7/18523 , H04L27/36 , H04N21/23895 , H04N21/4382 , H04N21/43853 , H04N21/6143 , H04N21/6193
摘要： A simplified scrambling scheme that unifies all signals of a satellite broadcasting system, including frame header, frame body and pilot symbols with a common reference phase. This results in the simplification and increased flexibility of the receiver front-end design without affecting the overall system performance. In many current communications systems with frame headers and pilot symbols, the phases of frame headers and pilot syrnbols are not designed to be aligned with any constellation points of the modulated data from the frame body. This scrambling scheme takes into account possible impact due to irregular phase changes between frame headers/pilot symbols and modulated data.
摘要翻译：一种简化的加扰方案，其将包括帧头，帧体和导频符号的卫星广播系统的所有信号统一为共同的参考相位。这导致了接收机前端设计的简化和增加的灵活性，而不会影响整个系统的性能。在具有帧头和导频符号的许多当前通信系统中，帧头和导频符号的相位不被设计为与来自帧体的调制数据的任何星座点对准。该加扰方案考虑到由帧头/导频符号和调制数据之间的不规则相位变化引起的可能的影响。

3. 发明申请

WO2008048530B1 OPTIMIZED UPLINK EFFICIENCIES FOR TRANSMISSION OF SATELLITE DATA 审中-公开
标题翻译：优化传输卫星数据的上网效率
公开(公告)号：WO2008048530B1
公开(公告)日：2008-10-30
申请号：PCT/US2007021955
申请日：2007-10-15
申请人： DIRECTV GROUP INC , ZHOU GUANGCAI , LIN TUNG-SHENG , LAI DENNIS , SANTORU JOSEPH , CHEN ERNEST C , MAITRA SHAMIK , COMEAUX CECILIA
发明人： ZHOU GUANGCAI , LIN TUNG-SHENG , LAI DENNIS , SANTORU JOSEPH , CHEN ERNEST C , MAITRA SHAMIK , COMEAUX CECILIA
IPC分类号： H04B17/00 , H03F1/32
CPC分类号： H04B17/0085 , H03F1/32 , H04B17/15
摘要： Systems and methods for characterizing amplifiers. A system for characterizing an amplifier in accordance with the present invention comprises a Gaussian signal source for generating a signal in the frequency domain, a notch filter, coupled to the Gaussian Noise source, wherein the notch filter has a notch at a specified frequency and a frequency bandwidth, the frequency bandwidth encompassing the specified frequency, an Inverse Fast Fourier Transform device, coupled to an output of the notch filter, a normalization device, coupled to the Inverse Fast Fourier Transform device, an amplifier under test, coupled to the normalization device, for amplifying the signal generated by the Gaussian signal source, and a measurement device, coupled to an output of the amplifier, for measuring a power output of the amplifier in the frequency bandwidth and a noise output at the specified notch frequency, and for calculating the ratio between the power output and the noise output.
摘要翻译：表征放大器的系统和方法。用于表征根据本发明的放大器的系统包括用于产生频域中的信号的高斯信号源，耦合到高斯噪声源的陷波滤波器，其中陷波滤波器具有指定频率的陷波和频率带宽，包含指定频率的频率带宽，耦合到陷波滤波器的输出的反相快速傅立叶变换装置，耦合到快速傅立叶逆变换装置的归一化装置，被测放大器，耦合到归一化装置，用于放大由高斯信号源产生的信号，以及耦合到放大器的输出的测量装置，用于测量放大器在频率带宽中的功率输出和在指定陷波频率下的噪声输出，并用于计算功率输出与噪声输出之间的比例。

4. 发明申请

WO2006007204A3 METHOD AND APPARATUS FOR MINIMIZING CO-CHANNEL INTERFERENCE BY SCRAMBLING 审中-公开
标题翻译：通过SCRAMBLING最小化通道间干扰的方法和装置
公开(公告)号：WO2006007204A3
公开(公告)日：2006-07-06
申请号：PCT/US2005018564
申请日：2005-05-26
申请人： DIRECTV GROUP INC , SUN FENG-WEN , IYER LAKSHMI , SANTORU JOSEPH , CHEN ERNEST C , MAITRA SHAMIK , LAI DENNIS , ZHOU GUANGCAI , LIN TUNG-SHENG
发明人： SUN FENG-WEN , IYER LAKSHMI , SANTORU JOSEPH , CHEN ERNEST C , MAITRA SHAMIK , LAI DENNIS , ZHOU GUANGCAI , LIN TUNG-SHENG
IPC分类号： H04J11/00 , H04B1/707 , H04B7/185 , H04J13/00
CPC分类号： H04W72/0466 , H04B1/7103 , H04B7/1858 , H04J13/102 , H04J13/16 , H04W72/082
摘要： An approach is provided for minimizing co-channel interference in a communication system is disclosed. Non-header portions of frames, which are transmitted over the communication system, are scrambled according to respective different scrambling sequences. The above arrangement is particularly suited to a digital satellite broadcast and interactive system.
摘要翻译：提供了一种用于最小化通信系统中的同信道干扰的方法。通过通信系统发送的帧的非标题部分根据各自不同的加扰序列被加扰。上述布置特别适用于数字卫星广播和交互式系统。

5. 发明申请

WO2004004193A3 IMPROVING HIERARCHICAL 8PSK PERFORMANCE 审中-公开
标题翻译：改进分层8PSK性能
公开(公告)号：WO2004004193A3
公开(公告)日：2005-01-20
申请号：PCT/US0320862
申请日：2003-07-01
申请人： DIRECTV GROUP INC , CHEN ERNEST C , SANTORU JOSEPH
发明人： CHEN ERNEST C , SANTORU JOSEPH
IPC分类号： H04L27/18 , H04L23/02 , H03M13/03 , H04L27/10 , H04L27/22
CPC分类号： H04L1/20 , H04L1/208 , H04L27/183 , H04L2001/0098
摘要： A method and receiver systems for demodulating and decoding a hierarchically modulated signal, e.g. an 8PSK signal, are disclosed. An exemplary method includes demodulating and processing (502) the hierarchically modulated signal (202) to produce symbols (212) from the first modulation at the first hierarchical level, applying information (504) from a plurality of the symbols from the first modulation at the first hierarchical level in subtracting (214) from the demodulated hierarchically modulated signal to obtain the second modulation at the second hierarchical level and processing (506) the second modulation at the second hierarchical level to produce second symbols (222) from the demodulated second signal. The hierarchically modulated signal comprises a non-uniform 8PSK signal. Applying the information from the plurality of the symbols from the first modulation can be achieved by applying the symbols after error correction. A decision-directed demodulation of the first modulation can also be used to further improve performance.
摘要翻译：用于解调和解码分层调制信号的方法和接收机系统，例如， 8PSK信号。一种示例性方法包括解调和处理（502）分层调制信号（202）以从第一层级的第一调制产生符号（212），从来自第一调制的多个符号应用信息（504）从解调的分层调制信号中减去（214）第一层级，以获得第二层级的第二调制，并处理（506）第二层级的第二调制，以从解调的第二信号产生第二符号（222）。分级调制信号包括不均匀的8PSK信号。可以通过在纠错后应用符号来实现来自第一调制的多个符号的信息。也可以使用第一调制的决策导向解调来进一步提高性能。

6. 发明申请

WO2004040820A3 FEEDER LINK CONFIGURATIONS TO SUPPORT LAYERED MODULATION 审中-公开
标题翻译：供应商链接配置支持层次调制
公开(公告)号：WO2004040820A3
公开(公告)日：2004-07-15
申请号：PCT/US0333255
申请日：2003-10-20
申请人： DIRECTV GROUP INC , ANDERSON PAUL R , SANTORU JOSEPH , CHEN ERNEST C
发明人： ANDERSON PAUL R , SANTORU JOSEPH , CHEN ERNEST C
IPC分类号： H04B7/185 , H04B7/204 , H04B7/208 , H04L20060101
CPC分类号： H04B7/18515
摘要： Systems and methods are disclosed for feeder link configurations to layered modulation. One feeder link system (13A) employs feeder link spot beam to antennas in distinct coverage areas to enable frequency reuse. In this system 1300, the uplink signals (116) comprise two distinct feeder link signals (1302A, 1302B). Feeder link spot beam antennas (1304A, 1304B) can be employed on the satellite (108) to reuse feeder link spectrum in order to not exceed bandwidth of the layered modulation on the downlink. The feeder link system (1300) includes a first feeder link antenna (1306A) and a second feeder link antenna (1306B) transmitting the first link signal at first frequency and the second link signal at second frequency respectively. Although the two feeder link frequencies are in substantially the same frequency band, the use of spot beam antennas (1304, 1304B) with distinct coverage areas (1308A, 1308B) prevents the first and second feeder link signals (1304A, 1304B) from interfering.
摘要翻译：公开了用于馈线链路配置到分层调制的系统和方法。一个馈线链路系统（13A）使用馈线链路点波束到不同覆盖区域中的天线，以实现频率重用。在该系统1300中，上行链路信号（116）包括两个不同的馈线链路信号（1302A，1302B）。馈送链路点波束天线（1304A，1304B）可以用于卫星（108）上以重新使用馈线链路频谱，以便不超过下行链路上的分层调制的带宽。馈线链路系统（1300）包括分别以第一频率发送第一链路信号和第二频率的第二链路信号的第一馈线链路天线（1306A）和第二馈线链路天线（1306B）。虽然两个馈线链路频率基本上是相同的频带，但是具有不同覆盖区域（1308A，1308B）的点波束天线（1304,1304B）的使用防止了第一和第二馈线链路信号（1304A，1304B）的干扰。

7. 发明申请

WO2004040406A3 ESTIMATING THE OPERATING POINT ON A NONLINEAR TRAVELING WAVE TUBE AMPLIFIER 审中-公开
标题翻译：估计非线性行波管放大器的运行点
公开(公告)号：WO2004040406A3
公开(公告)日：2004-07-22
申请号：PCT/US0333130
申请日：2003-10-17
申请人： DIRECTV GROUP INC , CHEN ERNEST C , MAITRA SHAMIK
发明人： CHEN ERNEST C , MAITRA SHAMIK
IPC分类号： H04B7/185 , H03F3/58
CPC分类号： H04B7/18515
摘要： A method, apparatus, article of manufacture, and a memory structure provide the ability to determine an input operating point and an output operating point on a non-linear traveling wave tube amplifier (TWTA). The non-linearity of the TWTA is measured (1302). An input roots mean-square (RMS) value of an input signal used to measure the non-linearity of the TWTA is computed (1304). The RMS value identifies an input operating point of the measured non-linearity of the TWTA. Lastly, an output operating point is obtained (1306).
摘要翻译：一种方法，装置，制品和存储结构提供了确定非线性行波管放大器（TWTA）上的输入工作点和输出工作点的能力。测量TWTA的非线性（1302）。计算用于测量TWTA的非线性度的输入信号的输入均方根（RMS）值（1304）。 RMS值标识TWTA的测量非线性的输入工作点。最后，获得输出工作点（1306）。

8. 发明申请

WO2004040897A3 MAXIMIZING POWER AND SPECTRAL EFFICIENCIES FOR LAYERED AND CONVENTIONAL MODULATIONS 审中-公开
标题翻译：最大化层次和常规调制的功率和光谱效率
公开(公告)号：WO2004040897A3
公开(公告)日：2004-07-01
申请号：PCT/US0332800
申请日：2003-10-16
申请人： DIRECTV GROUP INC , CHEN ERNEST C
发明人： CHEN ERNEST C
IPC分类号： H04B7/185 , H04L20060101 , H04L27/20 , H04L27/34
CPC分类号： H04L27/3488 , H04B7/18515 , H04H20/42 , H04H20/74 , Y02D70/00 , Y02D70/168 , Y02D70/446
摘要： Methods (1300) and apparatuses for maximizing power and spectral efficiencies in a wireless communication system are disclosed. The invention is particularly useful for layered modulation applications because power levels for such applications are relatively high. A layered modulation signal comprises an upper and a lower layer signal that interference with each other within the same frequency band such that the upper layer signal can be demodulated directly from the layered modulation signal, and the lower layer signal can be demodulated after subtracting the first layer signal from the layered modulation signal (1306). The invention applies one or more of the following four signal schemes in a communication signal including varying the symbol rate (rather than the code rate), reducing or eliminating the guard band, reducing excess signal bandwidth and employing layered modulation within the guard band of the legacy signal.
摘要翻译：公开了用于使无线通信系统中的功率和频谱效率最大化的方法（1300）和装置。本发明对于分层调制应用特别有用，因为这种应用的功率水平相对较高。分层调制信号包括在相同频带内彼此干扰的上层信号和下层信号，使得可以从分层调制信号直接解调上层信号，并且可以在减去第一来自分层调制信号（1306）的层信号。本发明将以下四种信号方案中的一种或多种应用于包括改变符号率（而不是码率）的通信信号中，减少或消除了保护频带，减少了多余的信号带宽并且在遗留信号。

9. 发明申请

WO2005101845A3 METHODS AND APPARATUSES FOR MINIMIZING CO-CHANNEL INTERFERENCE 审中-公开
标题翻译：用于最小化共通道干扰的方法和装置
公开(公告)号：WO2005101845A3
公开(公告)日：2007-11-01
申请号：PCT/US2005012280
申请日：2005-04-11
申请人： DIRECTV GROUP INC
发明人： LEE LIN-NAN , SUN FENG-WEN , VON ANCKEN ADAM , SANTORU JOSEPH , CHEN ERNEST C , MAITRA SHAMIK , LAI DENNIS , ZHOU GUANGCAI , LIN TUNG-SHENG
IPC分类号： H04L9/00 , H04B7/185 , H04L5/02 , H04N5/21 , H04N7/16 , H04N7/167 , H04N7/173
CPC分类号： H04N5/211 , H04B7/18513 , H04B7/1858 , H04N7/16 , H04N7/163 , H04N7/1675 , H04N7/17318 , H04N21/2347 , H04N21/4405 , H04N21/6143
摘要： Methods and apparatuses for minimizing co-channel interference in communications systems are disclosed. A method in accordance with the present invention comprises scrambling a first frame using a first scrambling code (1300), attaching a first header to the first frame to create the first signal (1302), scrambling a second frame using a second scrambling code (1304), attaching a second header to the second frame to create the second signal (1306), and transmitting the first signal and the second signal over different channels of th communication system (1308).
摘要翻译：公开了用于最小化通信系统中的同信道干扰的方法和装置。根据本发明的方法包括使用第一扰码（1300）对第一帧进行加扰，将第一报头附加到第一帧以产生第一信号（1302），使用第二加扰码对第二帧进行加扰（1304）），将第二报头附加到所述第二帧以产生所述第二信号（1306），以及通过所述通信系统（1308）的不同信道发送所述第一信号和所述第二信号。

10. 发明申请

WO2005101844A3 PHYSICAL LAYER HEADER SCRAMBLING IN SATELLITE BROADCAST SYSTEMS 审中-公开
标题翻译：卫星广播系统中的物理层头部扫描
公开(公告)号：WO2005101844A3
公开(公告)日：2007-02-01
申请号：PCT/US2005012278
申请日：2005-04-11
申请人： DIRECTV GROUP INC
发明人： LEE LIN-NAN , SUN FENG-WEN , VON ANCKEN ADAM , SANTORU JOSEPH , CHEN ERNEST C , MAITRA SHAMIK , LAI DENNIS , ZHOU GUANGCAI , LIN TUNG-SHENG
IPC分类号： G06F17/00 , H04B7/185 , H04L9/00 , H04N5/21 , H04N7/16 , H04N7/167 , H04N7/173
CPC分类号： H04N5/211 , H04B7/18513 , H04B7/1858 , H04N7/16 , H04N7/163 , H04N7/1675 , H04N7/17318 , H04N21/2347 , H04N21/4405 , H04N21/6143
摘要： Methods and apparatuses for minimizing co-channel interference in communications systems (400) are disclosed. A method in accordance with the present invention comprises scrambling a first header (401) of the first signal using a first scrambling code, and transmitting the first signal and the second signal with the scrambled first header and the scrambled second header (401) over different channels of the communication system.
摘要翻译：公开了用于最小化通信系统中的同信道干扰的方法和装置（400）。根据本发明的方法包括使用第一扰码对第一信号的第一报头（401）进行加扰，并且通过不同的第一报头和加扰的第二报头（401）发送第一信号和第二信号通信系统的通道。

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