公开(公告)号：US20110044390A1

公开(公告)日：2011-02-24

申请号：US12446076

申请日：2006-11-16

申请人： Junwei Wang ,  Qihong Ge ,  Tao Tao ,  Dong Bai ,  Wen Chen ,  Qinghua Yang ,  Qun Li

发明人： Junwei Wang ,  Qihong Ge ,  Tao Tao ,  Dong Bai ,  Wen Chen ,  Qinghua Yang ,  Qun Li

IPC分类号： H04L27/28

CPC分类号： H04J13/102 ,  H04B1/7075 ,  H04B1/709 ,  H04J13/0025 ,  H04J13/0051

摘要： A system and method for generating and detecting identifier sequence of a bandwidth-limited transmitter are disclosed, comprising an identifier sequence generating portion and a detection portion. The identifier sequence generating portion comprises: generating a frequency-domain random sequence; generating a frequency-domain orthogonal sequence; performing frequency-domain truncation; performing frequency-time transformation; and performing cycle extension. The identifier sequence receiving portion comprises: truncating the time-domain for the received signal; performing time-frequency domain transformation to obtain a frequency-domain signal; generating frequency-domain random sequence; generating a frequency-domain orthogonal sequence; correlating the frequency-domain orthogonal sequence with the frequency-domain signal de-scrambled by the frequency-domain random sequence; and detecting an output from a frequency-domain correlator by a threshold detecting device and determining the transmitter identifier sequence. The random sequence bandwidth generated by the system and the method of the present invention can be configured flexibly according to transmission bandwidth requirement, and the sequence may be arbitrarily allocated at the power of each frequency point inside the bandwidth. The present invention may be widely applied to multimedia broadcasting, terrestrial radio broadcasting, cable broadcasting and the like.

摘要翻译： 公开了一种用于产生和检测带宽限制发射机的标识符序列的系统和方法，包括标识符序列产生部分和检测部分。 标识符序列生成部分包括：产生频域随机序列; 产生频域正交序列; 执行频域截断; 执行频率 - 时间变换; 并执行循环扩展。 标识符序列接收部分包括：截断接收信号的时域; 执行时频域变换以获得频域信号; 产生频域随机序列; 产生频域正交序列; 将频域正交序列与由频域随机序列解扰的频域信号相关; 以及通过阈值检测装置检测来自频域相关器的输出，并确定发射机标识符序列。 系统生成的随机序列带宽和本发明的方法可以根据传输带宽要求灵活配置，并且该序列可以以带宽内的每个频点的功率任意分配。 本发明可以广泛地应用于多媒体广播，地面广播，有线广播等。

公开(公告)号：US08139622B2

公开(公告)日：2012-03-20

申请号：US12446076

申请日：2006-11-16

申请人： Junwei Wang ,  Qihong Ge ,  Tao Tao ,  Dong Bai ,  Wen Chen ,  Qinghua Yang ,  Qun Li

发明人： Junwei Wang ,  Qihong Ge ,  Tao Tao ,  Dong Bai ,  Wen Chen ,  Qinghua Yang ,  Qun Li

IPC分类号： H04B1/00

CPC分类号： H04J13/102 ,  H04B1/7075 ,  H04B1/709 ,  H04J13/0025 ,  H04J13/0051

摘要： A system and method for generating and detecting identifier sequence of a bandwidth-limited transmitter are disclosed, comprising an identifier sequence generating portion and a detection portion. The identifier sequence generating portion comprises: generating a frequency-domain random sequence; generating a frequency-domain orthogonal sequence; performing frequency-domain truncation; performing frequency-time transformation; and performing cycle extension. The identifier sequence receiving portion comprises: truncating the time-domain for the received signal; performing time-frequency domain transformation to obtain a frequency-domain signal; generating frequency-domain random sequence; generating a frequency-domain orthogonal sequence; correlating the frequency-domain orthogonal sequence with the frequency-domain signal de-scrambled by the frequency-domain random sequence; and detecting an output from a frequency-domain correlator by a threshold detecting device and determining the transmitter identifier sequence. The random sequence bandwidth generated by the system and the method of the present invention can be configured flexibly according to transmission bandwidth requirement, and the sequence may be arbitrarily allocated at the power of each frequency point inside the bandwidth. The present invention may be widely applied to multimedia broadcasting, terrestrial radio broadcasting, cable broadcasting and the like.

摘要翻译： 公开了一种用于产生和检测带宽限制发射机的标识符序列的系统和方法，包括标识符序列产生部分和检测部分。 标识符序列生成部分包括：产生频域随机序列; 产生频域正交序列; 执行频域截断; 执行频率 - 时间变换; 并执行循环扩展。 标识符序列接收部分包括：截断接收信号的时域; 执行时频域变换以获得频域信号; 产生频域随机序列; 产生频域正交序列; 将频域正交序列与由频域随机序列解扰的频域信号相关; 以及通过阈值检测装置检测来自频域相关器的输出，并确定发射机标识符序列。 系统生成的随机序列带宽和本发明的方法可以根据传输带宽要求灵活配置，并且该序列可以以带宽内的每个频点的功率任意分配。 本发明可以广泛地应用于多媒体广播，地面广播，有线广播等。

公开(公告)号：US20120173949A1

公开(公告)日：2012-07-05

申请号：US13395478

申请日：2010-08-11

申请人： Binbin Liu ,  Dong Bai ,  Qihong Ge ,  Tao Tao ,  Junwei Wang ,  Wen Chen

发明人： Binbin Liu ,  Dong Bai ,  Qihong Ge ,  Tao Tao ,  Junwei Wang ,  Wen Chen

IPC分类号： H03M13/05 ,  G06F11/10

CPC分类号： H03M13/116 ,  H03M13/036 ,  H03M13/118 ,  H04L1/0057

摘要： The embodiments of the present invention provide a method of constructing parity-check matrix of LDPC code. The method comprises the following steps of: constructing a MB×NB base matrix B for an LDPC code with code rate R and code length N, wherein MB=M/K, NB=N/K, M=N (1−R), K is the expansion factor of the base matrix, Kεφ, and φ is the set of the common factors of M and N; and replacing the elements of the base matrix B with a K×K matrix, and expanding the base matrix B into a parity-check matrix H with size of M×N for the encoding or decoding of the LDPC code. An encoding method and apparatus of LDPC code are also provided by the embodiments of the present invention. The technical solutions provided by the embodiments of the present invention can construct LDPC codes with good performance, solve the storage problem of the parity-check matrix, and effectively reduce the implementation complexity of the encoding apparatus.

摘要翻译： 本发明的实施例提供了一种构造LDPC码奇偶校验矩阵的方法。 该方法包括以下步骤：为码率为R和码长N的LDPC码构建MB×NB基本矩阵B，其中MB = M / K，NB = N / K，M = N（1-R） ，K是基本矩阵的扩展因子，K＆egr＆amp;＆phgr;和＆phgr; 是M和N的共同因素的集合; 并且用K×K矩阵代替基本矩阵B的元素，并且将基本矩阵B扩展成具有M×N大小的奇偶校验矩阵H以进行LDPC码的编码或解码。 本发明的实施例也提供了LDPC码的编码方法和装置。 本发明实施例提供的技术方案可以构建具有良好性能的LDPC码，解决奇偶校验矩阵的存储问题，有效降低编码装置的实现复杂度。

公开(公告)号：US20110268206A1

公开(公告)日：2011-11-03

申请号：US13143664

申请日：2009-12-30

申请人： Qihong Ge ,  Junwei Wang ,  Binbin Liu ,  Dong Bai ,  Tao Tao

发明人： Qihong Ge ,  Junwei Wang ,  Binbin Liu ,  Dong Bai ,  Tao Tao

IPC分类号： H04L27/28

CPC分类号： H04L27/2601 ,  H04L5/00 ,  H04L25/023

摘要： The present invention relates to the field of communication technology. A channel estimation device for an Orthogonal Frequency Division Multiplexing (OFDM) system is provided for performing channel estimation on data based on synchronization signal and pilot, which comprises: a synchronization signal based initial channel estimation module for performing initial channel estimation based on a synchronization signal in the data; a pilot channel tracking module for performing pilot channel tracking on the result of the initial channel estimation; a noise reduction module for performing noise reduction on the result of the pilot channel tracking; and an effective sub-carrier extraction module for extracting channel estimation values of effective sub-carriers from the result of the noise reduction. With the channel estimation method and device for OFDM system according to the present invention, the channel estimation is carried out jointly based on the synchronization signal and the pilot, such that the accuracy of channel estimation can be significantly improved and the performance requirements of the system can be satisfied without increasing the density of pilots and thus reducing the amount of system payload. Moreover, the synchronization signal can still be used for its original purpose of carrier and timing synchronization.

摘要翻译： 本发明涉及通信技术领域。 提供了一种用于正交频分复用（OFDM）系统的信道估计装置，用于基于同步信号和导频对数据执行信道估计，其包括：基于同步信号的初始信道估计模块，用于基于同步信号执行初始信道估计 在数据中; 导频信道跟踪模块，用于对初始信道估计的结果执行导频信道跟踪; 噪声降低模块，用于对导频信道跟踪的结果进行降噪; 以及有效子载波提取模块，用于从降噪的结果中提取有效子载波的信道估计值。 利用根据本发明的OFDM系统的信道估计方法和装置，基于同步信号和导频共同进行信道估计，从​​而可以显着提高信道估计的精度和系统的性能要求 可以在不增加导频密度的情况下得到满足，从而减少系统有效载荷的数量。 此外，同步信号仍然可以用于载波和定时同步的原始目的。

公开(公告)号：US08165052B2

公开(公告)日：2012-04-24

申请号：US12058686

申请日：2008-03-29

申请人： Bingyu Qu ,  Junwei Wang ,  Yingzhe Ding

发明人： Bingyu Qu ,  Junwei Wang ,  Yingzhe Ding

IPC分类号： H04H20/71

CPC分类号： H04L5/023 ,  H04W4/06 ,  H04W28/06 ,  H04W28/26

摘要： A method for multiplexing a broadcast service channel and a non-broadcast service channel includes: reserving TF resources for carrying non-broadcast service data on a sub-frame for carrying broadcast service data, and multiplexing the broadcast service data and the non-broadcast service data to the sub-frame for carrying the broadcast service data. Correspondingly, a device for multiplexing a broadcast service channel and a non-broadcast service channel is disclosed. Hence, the system signaling overhead occupied during a TDM process between broadcast service and Unicast service is reduced, and the transmission delay of Unicast service is reduced.

摘要翻译： 一种广播业务信道和非广播业务信道的复用方法，包括：在用于承载广播业务数据的子帧上预留携带非广播业务数据的TF资源，多路广播业务数据和非广播业务 数据传送到用于承载广播服务数据的子帧。 相应地，公开了一种用于复用广播服务信道和非广播服务信道的设备。 因此，在广播业务与单播业务之间TDM过程中占用的系统信令开销减小，单播业务的传输延迟降低。

公开(公告)号：US08445713B2

公开(公告)日：2013-05-21

申请号：US12738687

申请日：2008-10-17

申请人： Stefan Wershofen ,  Stephan Klein ,  Zhiping Zhou ,  Xinkui Wang ,  Junwei Wang ,  Maoqing Kang

发明人： Stefan Wershofen ,  Stephan Klein ,  Zhiping Zhou ,  Xinkui Wang ,  Junwei Wang ,  Maoqing Kang

IPC分类号： C07C69/96 ,  C07C271/12 ,  C01F17/00

CPC分类号： B01J23/10 ,  B01J37/088 ,  C07C68/00 ,  C07C69/96

摘要： The present invention relates to a catalyst for the synthesis of organic carbonates, the preparation of the catalyst and the application of this catalyst in the synthesis of organic carbonates from reacting urea and hydroxyl group containing compounds. The catalyst provided in this invention is a calcinate of hydrous salt containing rare earth element at a moderate calcining temperature.

摘要翻译： 本发明涉及一种用于合成有机碳酸酯的催化剂，催化剂的制备以及该催化剂在由脲和含羟基的化合物的反应合成有机碳酸酯中的应用。 本发明提供的催化剂是在适度的煅烧温度下煅烧含有含稀土元素的含水盐。

公开(公告)号：US20100312001A1

公开(公告)日：2010-12-09

申请号：US12738687

申请日：2008-10-17

申请人： Stefan Wershofen ,  Stephan Klein ,  Zhiping Zou ,  Xinkui Wang ,  Junwei Wang ,  Maoqing Kang

发明人： Stefan Wershofen ,  Stephan Klein ,  Zhiping Zou ,  Xinkui Wang ,  Junwei Wang ,  Maoqing Kang

IPC分类号： C07C69/96 ,  C01F17/00 ,  C07C271/12

CPC分类号： B01J23/10 ,  B01J37/088 ,  C07C68/00 ,  C07C69/96

摘要： The present invention relates to a catalyst for the synthesis of organic carbonates, the preparation of the catalyst and the application of this catalyst in the synthesis of organic carbonates from reacting urea and hydroxyl group containing compounds. The catalyst provided in this invention is a calcinate of hydrous salt containing rare earth element at a moderate calcining temperature.

摘要翻译： 本发明涉及一种用于合成有机碳酸酯的催化剂，催化剂的制备以及该催化剂在由脲和含羟基的化合物的反应合成有机碳酸酯中的应用。 本发明提供的催化剂是在适度的煅烧温度下煅烧含有含稀土元素的含水盐。

公开(公告)号：US20120155369A1

公开(公告)日：2012-06-21

申请号：US13404956

申请日：2012-02-24

申请人： Junwei Wang ,  Xiaoan Fan ,  Jianghua Liu

发明人： Junwei Wang ,  Xiaoan Fan ,  Jianghua Liu

IPC分类号： H04W72/04 ,  H04W4/06

CPC分类号： H04L5/14 ,  H04J11/00 ,  H04L5/0007 ,  H04L5/003 ,  H04L5/0091 ,  H04L5/22 ,  H04L49/201 ,  H04W4/06 ,  H04W72/005 ,  H04W72/02 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/0493

摘要： A method and device for service time division multiplexing as well as a method and a device for transmitting service are disclosed. The method for service time division multiplexing includes: selecting a part or all of radio frames in one time unit as specific radio frames; and selecting a part or all of subframes in the specific radio frames as specific subframes for sending a specific service. The specific service is a multimedia broadcast multicast service, or a unicast service, or one or more than one kind of services transmitted in broadcast or multicast mode.

公开(公告)号：US20120155368A1

公开(公告)日：2012-06-21

申请号：US13404590

申请日：2012-02-24

申请人： Junwei Wang ,  Xiaoan Fan ,  Jianghua Liu

发明人： Junwei Wang ,  Xiaoan Fan ,  Jianghua Liu

IPC分类号： H04W72/04 ,  H04W4/06

CPC分类号： H04L5/14 ,  H04J11/00 ,  H04L5/0007 ,  H04L5/003 ,  H04L5/0091 ,  H04L5/22 ,  H04L49/201 ,  H04W4/06 ,  H04W72/005 ,  H04W72/02 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/0493

摘要： A method and device for service time division multiplexing as well as a method and a device for transmitting service are disclosed. The method for service time division multiplexing includes: selecting a part or all of radio frames in one time unit as specific radio frames; and selecting a part or all of subframes in the specific radio frames as specific subframes for sending a specific service. The specific service is a multimedia broadcast multicast service, or a unicast service, or one or more than one kind of services transmitted in broadcast or multicast mode.

摘要翻译： 公开了一种用于业务时分复用的方法和设备以及用于发送业务的方法和设备。 所述服务时分复用方法包括：以一个时间单位选择一部分或全部无线帧作为特定无线电帧; 以及在所述特定无线帧中选择一部分或全部子帧作为用于发送特定服务的特定子帧。 该特定服务是多媒体广播多播服务或单播服务，或以广播或组播模式发送的一种或多种服务。

公开(公告)号：US20110019659A1

公开(公告)日：2011-01-27

申请号：US12903792

申请日：2010-10-13

申请人： Junwei Wang ,  Xiaoan Fan ,  Jianghua Liu

发明人： Junwei Wang ,  Xiaoan Fan ,  Jianghua Liu

IPC分类号： H04B7/212

CPC分类号： H04L5/14 ,  H04J11/00 ,  H04L5/0007 ,  H04L5/003 ,  H04L5/0091 ,  H04L5/22 ,  H04L49/201 ,  H04W4/06 ,  H04W72/005 ,  H04W72/02 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/0493

摘要： A method and device for service time division multiplexing as well as a method and a device for transmitting service are disclosed. The method for service time division multiplexing includes: selecting a part or all of radio frames in one time unit as specific radio frames; and selecting a part or all of subframes in the specific radio frames as specific subframes for sending a specific service. The specific service is a multimedia broadcast multicast service, or a unicast service, or one or more than one kind of service transmitted in broadcast or multicast mode.

摘要翻译： 公开了一种用于业务时分复用的方法和设备以及用于发送业务的方法和设备。 所述服务时分复用方法包括：以一个时间单位选择一部分或全部无线帧作为特定无线电帧; 以及在所述特定无线帧中选择一部分或全部子帧作为用于发送特定服务的特定子帧。 该特定服务是多媒体广播多播服务或单播服务，或以广播或组播模式发送的一种或多种服务。