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1. 发明申请

WO2010138199A3 METHOD AND APPARATUS FOR SYMBOL TIMING RECOVERY 审中-公开
标题翻译：符号时序恢复的方法和装置
公开(公告)号：WO2010138199A3
公开(公告)日：2011-03-24
申请号：PCT/US2010001570
申请日：2010-05-28
申请人： THOMSON LICENSING , KNUTSON PAUL GOTHARD , SCHMITT DIRK , GAO WEN
发明人： KNUTSON PAUL GOTHARD , SCHMITT DIRK , GAO WEN
IPC分类号： H04L7/04 , H04L7/10 , H04L27/26
CPC分类号： H04L27/2678 , H04H40/90 , H04L7/0062 , H04L7/042 , H04L7/10 , H04L27/0014 , H04L27/2613 , H04L27/2656 , H04L27/2679 , H04L2027/0053 , H04L2027/0067 , H04W56/005
摘要： Methods and apparatus for symbol timing recovery are provided. Both a coarse symbol timing recovery method and apparatus, and a fine symbol timing recovery method and apparatus are described which can be used jointly for symbol recovery, for example in phase shift keying receivers. The coarse method involves the use of differential correlations and finding the time difference in peak values of the correlation results. The fine method involves interpolation of a received digital signal, followed by filtering and timing error detection. The error detection signal is further filtered and used to control the interpolator. The methods provide for robust symbol timing synchronization.
摘要翻译：提供了符号定时恢复的方法和装置。描述了粗符号定时恢复方法和装置以及可以联合用于符号恢复的精细符号定时恢复方法和装置，例如在相移键控接收机中。粗略方法涉及使用差分相关性，并找出相关结果峰值的时间差。精细的方法包括对接收到的数字信号进行插值，然后进行滤波和定时误差检测。误差检测信号被进一步滤波并用于控制内插器。这些方法提供鲁棒符号定时同步。

2. 发明申请

WO2010138201A3 IMPROVED SYNC DETECTION AND FREQUENCY RECOVERY FOR SATELLITE SYSTEMS 审中-公开
标题翻译：改进的卫星系统的同步检测和频率恢复
公开(公告)号：WO2010138201A3
公开(公告)日：2011-03-24
申请号：PCT/US2010001572
申请日：2010-05-28
申请人： THOMSON LICENSING , KNUTSON PAUL GOTHARD , SCHMITT DIRK , GAO WEN
发明人： KNUTSON PAUL GOTHARD , SCHMITT DIRK , GAO WEN
IPC分类号： H04L7/04 , H04L27/00
CPC分类号： H04L27/2678 , H04H40/90 , H04L7/0062 , H04L7/042 , H04L7/10 , H04L27/0014 , H04L27/2613 , H04L27/2656 , H04L27/2679 , H04L2027/0053 , H04L2027/0067 , H04W56/005
摘要： A method of frame sync detection is described. A first and second differential correlation of a data stream is calculated, at a plurality of delay and conjugate multipliers. The first and second differential correlations are convolved with a previous set of differential correlations. A correlation peak is calculated, at a sync detector, using the convolved differential correlations, to detect a frame sync.
摘要翻译：描述帧同步检测的方法。在多个延迟和共轭乘数下，计算数据流的第一和第二差分相关。第一和第二差分相关性与先前的差分相关集合进行卷积。在同步检测器处，使用卷积差分相关来计算相关峰值，以检测帧同步。

3. 发明申请

WO03081827A2 METHOD AND APPARATUS FOR INDICATING THE PRESENCE OF A WIRELESS LOCAL AREA NETWORK BY DETECTING SIGNATURE SEQUENCES 审中-公开
标题翻译：通过检测标志序列来指示无线局域网的存在的方法和装置
公开(公告)号：WO03081827A2
公开(公告)日：2003-10-02
申请号：PCT/US0306764
申请日：2003-03-05
申请人： THOMSON LICENSING SA , RAMASWAMY KUMAR , LITWIN LOUIS ROBERT , KNUTSON PAUL GOTHARD , GAO WEN , WANG CHARLES CHUANMING
发明人： RAMASWAMY KUMAR , LITWIN LOUIS ROBERT , KNUTSON PAUL GOTHARD , GAO WEN , WANG CHARLES CHUANMING
IPC分类号： H04L12/28 , H04W36/00 , H04W36/14 , H04W48/18 , H04W52/02 , H04L
CPC分类号： H04W48/18 , H04W36/0088 , H04W36/14 , H04W52/0229 , H04W52/0245 , H04W52/0254 , Y02D70/00 , Y02D70/142 , Y02D70/164
摘要： A method and apparatus for detecting the presence of a wireless local area network (WLAN) (104) detects at least one signature sequence in a radio frequency (RF) signal associated with a WLAN (104). The present invention indicates the presence of a WLAN (104) in response to the detection of the at least one signature sequence in the RF signal.
摘要翻译：用于检测无线局域网（WLAN）（104）的存在的方法和装置检测与WLAN（104）相关联的射频（RF）信号中的至少一个签名序列。本发明指示响应于RF信号中的至少一个签名序列的检测而存在WLAN（104）。

4. 发明申请

WO2010005470A3 BIT INTERLEAVED LDPC CODED MODULATION AND PHYSICAL LAYER SIGNALING 审中-公开
标题翻译：位交织LDPC码调制和物理层信令
公开(公告)号：WO2010005470A3
公开(公告)日：2010-04-15
申请号：PCT/US2009003578
申请日：2009-06-16
申请人： THOMSON LICENSING , LEI JING , GAO WEN , KNUTSON PAUL GOTHARD , CHEN HOU-SHIN
发明人： LEI JING , GAO WEN , KNUTSON PAUL GOTHARD , CHEN HOU-SHIN
IPC分类号： H04L1/00 , H03M13/25 , H03M13/27 , H03M13/35
CPC分类号： H04L1/0041 , H04L1/0057 , H04L1/007 , H04L1/0071
摘要： A proposal for a DVB-C2 baseline system, mainly focused on the channel coding and bit interleaving modules for spectrally efficient modulation is described. Due to the implementation simplicity of the low density parity check (LDPC) codes standardized in the DVB-S2 specification, it is proposed to extend their application to cable channels and choose the subset with long block length ( L = 64800 ) and medium to high rates ( 2/5 = R = 9/10 ) as the forward error correction (FEC) codes of DVB-C2 systems. Due to the non-uniform bitwise error protection inherent to high-order modulations (e.g. 256-QAM, 1024-QAM) and irregular LDPC codes (e.g. DVB-S2 codes), there exists a mismatch between the modulation and the channel coding in general if the two modules are developed independently but concatenated directly. To match the error resilience of a finite-length channel code and a given constellation, the principles described herein design a bit interleaver and insert it between the channel encoder and the modulator. As a result, a better tradeoff between bandwidth-efficiency and power-efficiency can be achieved with a minor increase of hardware complexity.
摘要翻译：描述了DVB-C2基线系统的建议，主要集中在用于频谱有效调制的信道编码和比特交织模块。由于在DVB-S2规范中标准化的低密度奇偶校验（LDPC）码的实现简单，因此建议将其应用扩展到有线信道并选择具有长块长度（L = 64800）和中等到高的子集作为DVB-C2系统的前向纠错（FEC）码率（2/5 = R = 9/10）。由于高阶调制（例如256-QAM，1024-QAM）和不规则LDPC码（例如DVB-S2码）固有的非均匀位错误保护，通常在调制和信道编码之间存在失配如果这两个模块是独立开发的，但直接连接起来。为了匹配有限长度信道码和给定星座的差错恢复能力，本文描述的原理设计比特交织器并将其插入到信道编码器和调制器之间。因此，只需稍稍增加硬件复杂度就可以实现带宽效率和功效之间的更好折衷。

5. 发明申请

WO03073765A9 SATELLITE TELEVISION SYSTEM GROUND STATION HAVING WIDEBAND MULTI-CHANNEL LNB CONVERTER/TRANSMITTER ARCHITECTURE WITH CONTROLLED UPLINK TRANSMISSION 审中-公开
标题翻译：卫星电视系统接地宽带多通道LNB转换器/发射机结构与控制上行链路传输
公开(公告)号：WO03073765A9
公开(公告)日：2003-12-18
申请号：PCT/US0305557
申请日：2003-02-24
申请人： THOMSON LICENSING SA , KNUTSON PAUL GOTHARD , RAMASWAMY KUMAR , MUTERSPAUGH MAX WARD
发明人： KNUTSON PAUL GOTHARD , RAMASWAMY KUMAR , MUTERSPAUGH MAX WARD
IPC分类号： H04B7/155 , H04B7/185 , H04B7/19 , H04N7/20
CPC分类号： H04B7/18517 , H04N7/20
摘要： A satellite television ground system, particularly for a make or break satellite television signal system, includes an outdoor unit and an indoor unit that are in communication with each other via a single coaxial cable and an optional separate single conductor for power. The satellite television ground system is operative to measure and reverse frequency conversion errors utilizing DSP techniques, allowing for more precise generation and transmission of uplink signals from the satellite television ground system. Control data for the system is sent via a low data rate connection on a power cable thereof, or by a narrowband signaling channel via a coax cable. The system also utilizes a single reference oscillator to drive the various frequency synthesizers and the like. The satellite television ground system utilizes related oscillators for the uplink and downlink sections. Carrier frequency offset in the downlink is measured in a carrier tracking loop part of a television signal demodulator. The carrier frequency offset of the downlink is utilized to synthesize various frequency signals for the uplink and downlink sections to correct frequency errors. For the uplink section, the carrier frequency offset of the downlink is reversed in the uplink. If the uplink is on a different frequency, the measured offset of the system master oscillator can be scaled by different synthesizer ratios.
摘要翻译：特别是卫星电视信号系统的卫星电视地面系统包括通过单个同轴电缆和用于供电的可选单独单独导体彼此通信的室外单元和室内单元。卫星电视地面系统可利用DSP技术来测量和反向频率转换误差，从而可以更精确地生成和传输卫星电视地面系统的上行链路信号。系统的控制数据经由其电力电缆上的低数据速率连接或经由同轴电缆的窄带信令信道发送。该系统还利用单个参考振荡器来驱动各种频率合成器等。卫星电视地面系统利用相关振荡器进行上行链路和下行链路。在电视信号解调器的载波跟踪环路部分中测量下行链路中的载波频率偏移。下行链路的载波频率偏移用于合成上行链路和下行链路各部分的各种频率信号，以纠正频率误差。对于上行链路部分，下行链路的载波频率偏移在上行链路中相反。如果上行链路处于不同的频率，则系统主振荡器的测量偏移量可以通过不同的合成器比率来缩放。

6. 发明申请

WO2007046877A3 CABLE REMODULATOR 审中-公开
标题翻译：电缆调节器
公开(公告)号：WO2007046877A3
公开(公告)日：2007-08-23
申请号：PCT/US2006021096
申请日：2006-05-31
申请人： THOMSON LICENSING , KNUTSON PAUL GOTHARD , MUTERSPAUGH MAX WARD , RAMASWAMY KUMAR
发明人： KNUTSON PAUL GOTHARD , MUTERSPAUGH MAX WARD , RAMASWAMY KUMAR
IPC分类号： H04N7/10
CPC分类号： H04N7/17309 , H04H20/78 , H04N21/6168
摘要： An apparatus for use in a cable system comprises a first port for use in coupling to a portion of a cable network for receiving an upstream signal having a frequency spectrum including a first frequency band; and a remodulator for translating the first frequency band of the received upstream signal to a second frequency band for transmission back downstream via the first port; wherein the first frequency band and the second frequency band are different from those frequency bands used by a head-end of the cable network for Internet communications.
摘要翻译：一种用于电缆系统的装置，包括：第一端口，用于耦合到电缆网络的一部分，用于接收具有包括第一频带的频谱的上行信号; 以及用于将所接收的上游信号的第一频带转换成第二频带以用于经由第一端口向下游传输的再调制器; 其中第一频带和第二频带不同于用于互联网通信的有线网络的前端使用的频带。

7. 发明申请

WO0150631A3 CARRIER TRACKING LOOP FOR DIRECT SEQUENCE SPREAD SPECTRUM SYSTEMS 审中-公开
标题翻译：用于直接序列扩频系统的载波跟踪环路
公开(公告)号：WO0150631A3
公开(公告)日：2002-01-17
申请号：PCT/US0035224
申请日：2000-12-22
申请人： THOMSON LICENSING SA , BELOTSERKOVSKY MAXIM BORISOVIC , SHIUE DONG CHANG , KNUTSON PAUL GOTHARD , RAMASWAMY KUMAR
发明人： BELOTSERKOVSKY MAXIM BORISOVIC , SHIUE DONG-CHANG , KNUTSON PAUL GOTHARD , RAMASWAMY KUMAR
IPC分类号： H04J13/04 , H04L27/00 , H04L27/233
CPC分类号： H04L27/2332 , H04L2027/003 , H04L2027/0053 , H04L2027/0069
摘要： A wireless telephone system comprises a base transceiver having a base receiver and a plurality of wireless handsets. Each handset comprises a handset transceiver for establishing a DSSS link over a shared channel with the base unit via the base transceiver. Each receiver the base transceiver and the handset transceivers receives a spread-spectrum signal representing symbol data from a transmitter of the system, where each such receiver comprises a derotator that derotates the spread-spectrum signal in accordance with a counter-rotating signal to provide a derotated signal; a correlator for receiving the derotated signal and for providing output symbol data based on the derotated signal; a carrier tracking loop (CTL) phase error estimator for receiving the output symbol data and for generating a CTL phase error signal based upon the rotation of the spread-spectrum signal; and a CTL for generating the counter-rotating signal based on the CTL phase error signal.
摘要翻译：无线电话系统包括具有基站接收机和多个无线手机的基站收发器。每个手机包括手持机收发器，用于通过基本收发器与基本单元在共享信道上建立DSSS链路。基站收发机和手持收发机的每个接收机从系统的发射机接收表示符号数据的扩频信号，其中每个这样的接收机包括一个反转器，该解旋转器根据反向旋转信号来消除扩展频谱信号，消旋信号; 相关器，用于接收解旋信号，并用于基于解旋信号提供输出符号数据; 载波跟踪环路（CTL）相位误差估计器，用于接收输出符号数据并根据扩频信号的旋转产生CTL相位误差信号; 以及用于基于CTL相位误差信号产生反向旋转信号的CTL。

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