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

CN101247204B 全球数字广播系统中的鲁棒性模式检测实现方法失效
公开(公告)号：CN101247204B
公开(公告)日：2011-05-11
申请号：CN200710177999.7
申请日：2007-11-23
申请人：清华大学
发明人：徐淑正 , 曾琳 , 张鹏 , 王鹏军 , 杨华中
IPC分类号： H04L1/00 , H04L27/26 , H04H20/80
摘要：全球数字广播系统中的鲁棒性模式检测方法属于鲁棒性模式检测技术领域，其特征在于，首先用线性加权相关取模的方法对四种模式进行遍历，求出各自对应的相关值序列，再用各种模式所得的相关值乘以不同大小的常数的方法以使得全局最大值出现在其匹配模式的相关值序列中，最后根据相关值序列中的全局最大值来确定当前的鲁棒性模式。本方案具有简单直观、可降低计算复杂度、而且即便在信噪比大幅恶化时只需调节四个常数，其判决正确率仍然非常高，并且其模式检测的判决依据也非常简单。

2. 发明公开

CN101247204A 全球数字广播系统中的鲁棒性模式检测实现方法失效
公开(公告)号：CN101247204A
公开(公告)日：2008-08-20
申请号：CN200710177999.7
申请日：2007-11-23
申请人：清华大学
发明人：徐淑正 , 曾琳 , 张鹏 , 王鹏军 , 杨华中
IPC分类号： H04L1/00 , H04L27/26 , H04H20/80
摘要：全球数字广播系统中的鲁棒性模式检测方法属于鲁棒性模式检测技术领域，其特征在于，首先用线性加权相关取模的方法对四种模式进行遍历，求出各自对应的相关值序列，再用各种模式所得的相关值乘以不同大小的常数的方法以使得全局最大值出现在其匹配模式的相关值序列中，最后根据相关值序列中的全局最大值来确定当前的鲁棒性模式。本方案具有简单直观、可降低计算复杂度、而且即便在信噪比大幅恶化时只需调节四个常数，其判决正确率仍然非常高，并且其模式检测的判决依据也非常简单。

3. 发明公开

CN113841414A 经由电缆传达无线信号的通信系统有权
公开(公告)号：CN113841414A
公开(公告)日：2021-12-24
申请号：CN202080036759.9
申请日：2020-03-19
申请人： PPC宽带股份有限公司
发明人： P·贝利 , Y·李
IPC分类号： H04N21/26 , H04H20/80 , H04W88/14 , H04W92/00
摘要：一种用于经由电缆网络传达无线信号的系统包含经由电缆传达无线信号(WoC)的放大器，所述放大器被配置为与调制解调器传达无线频带信号。所述系统还可包含WoC分离器，所述WoC分离器被配置为直接地或经由一个或多个电缆与所述WoC放大器传达所述无线频带信号；和WoC适配器，所述WoC适配器被配置为经由一个或多个电缆从所述WoC分离器接收所述无线频带信号，并且将所述无线频带信号无线地传输到一个或多个无线通信装置。

4. 发明授权

US5930231A Block spectrum receiver for a broadband communications system 失效
标题翻译：用于宽带通信系统的频谱接收机
公开(公告)号：US5930231A
公开(公告)日：1999-07-27
申请号：US625399
申请日：1996-03-27
申请人： Kevin L. Miller , Ramin Borazjani
发明人： Kevin L. Miller , Ramin Borazjani
IPC分类号： H04N7/10 , H04B1/26 , H04H20/34 , H04H20/42 , H04H20/79 , H04H20/80 , H04H40/27 , H04H60/97 , H04J11/00 , H04L5/02 , H04L5/14 , H04L7/02 , H04L12/28 , H04M3/00 , H04M7/00 , H04M7/12 , H04M9/02 , H04N7/173 , H04J1/00 , H04J3/16
CPC分类号： H04H20/80 , H04H20/34 , H04H20/42 , H04H20/79 , H04H40/27 , H04H60/97 , H04L12/2801 , H04L5/023 , H04L5/143 , H04M7/006 , H04N7/10 , H04N7/17309 , H04L7/0062 , H04M7/12 , H04M9/027
摘要： A communication system for coupling telephony or other signals to a broadband network such as a CATV network. The system transmits a multiplex of telephony signals in the forward band of the broadband network, with individual signals directed to an addressed subscriber. Telephony signals returning from subscribers upstream to a headend unit (HIU) are modulated onto the reverse band of the broadband network in a frequency division multiple access (FDMA) arrangement. The upstream modulated telephony signals are received at a telephony network interface at the HIU coupled to the broadband network. A group of reverse band modulated telephony signals are received at a group receiver or channelizer. The group receiver processes all upstream telephony signals within a selected spectral subband in the reverse band to apply a receiver matched filter with a weighted overlap and add circuit, and are then converted to baseband by an FFT circuit. The group receiver provides a serial data stream representing the baseband telephony signals. The baseband telephony signals are processed to derive demodulated telephony signals. The demodulated telephony signals are coupled to the telephony network.
摘要翻译：用于将电话或其他信号耦合到诸如CATV网络的宽带网络的通信系统。该系统在宽带网络的前向频带中发送电话信号的复用，其中各个信号被定向到寻址的用户。从用户上游返回到前端单元（HIU）的电话信号在频分多址（FDMA）布置中被调制到宽带网络的反向频带上。在耦合到宽带网络的HIU处的电话网络接口处接收上行调制电话信号。一组反向频带调制电话信号在组接收机或信道发送器处被接收。组接收机处理反向频带内所选择的频谱子带内的所有上行电话信号，以将具有加权重叠和相加电路的接收机匹配滤波器应用于FFT电路。组接收器提供表示基带电话信号的串行数据流。处理基带电话信号以导出解调的电话信号。解调的电话信号耦合到电话网络。

5. 发明授权

US5537637A Medium-frequency radio broadcasting retransmission system for confined and electromagnetically shielded areas 失效
标题翻译：用于有限和电磁屏蔽区域的中频无线广播重传系统
公开(公告)号：US5537637A
公开(公告)日：1996-07-16
申请号：US207209
申请日：1994-03-08
申请人： Tadao Sugita , Tatehiko Toyosawa , Kazumi Shoji , Shinichi Watanabe , Atsumi Fujiwara , Masaaki Kitanda
发明人： Tadao Sugita , Tatehiko Toyosawa , Kazumi Shoji , Shinichi Watanabe , Atsumi Fujiwara , Masaaki Kitanda
IPC分类号： H01Q1/00 , H04B5/00 , H04H20/80 , H04B7/14
CPC分类号： H04H20/80 , H01Q1/007 , H04B5/0093
摘要： A medium-frequency radio transmission system is formed by installing a receiving antenna for receiving an amplitude-modulated medium-frequency radio wave at the rooftop of an existing building, receiving the medium-frequency radio wave, coupling the received medium-frequency radio wave to an existing distributing cable or distributing conductive piping with or without a coupler for the radio wave, and transmitting the radio wave to a predetermined floor. At the predetermined floor the basement or tunnel of an existing building such as underground shopping mall, underground parking lot, underground railway, road tunnel or deep space of massive building is provided with a coupling such as an existing loop-like or linear wiring or piping line with or without a coupler.
摘要翻译：通过在现有建筑物的屋顶安装用于接收调幅中频无线电波的接收天线，接收中频无线电波，将接收到的中频无线电波耦合到现有的分配电缆或具有或不具有用于无线电波的耦合器的导电管线，以及将无线电波发射到预定的地板。在预定楼层，现有建筑物的地下室或隧道，如地下商场，地下停车场，地下铁路，公路隧道或大型建筑物的深空，设有诸如现有的环状或线性布线或管道具有或不具有耦合器的线。

6. 发明专利

JPH0795135A MEDIUM WAVE RADIO TRANSMISSION METHOD 失效
公开(公告)号：JPH0795135A
公开(公告)日：1995-04-07
申请号：JP23489293
申请日：1993-09-21
申请人： NHK ITEC KK , JAPAN BROADCASTING CORP
发明人： SUGITA TADAO , TOYOSAWA TATEHIKO , SHOJI KAZUMI , WATANABE SHINICHI
IPC分类号： H01F17/04 , H04B3/54 , H04B5/00 , H04H20/02 , H04H20/63 , H04H20/76 , H04H20/80
摘要： PURPOSE:To attain high economical effect and to allow the user listen to a medium wave radio broadcast in a radio wave choke block by coupling a radio medium wave received by a roof top antenna with an existing wire or pipe of an existing building via a radio wave coupler and sending the radio wave up to a predetermined floor so as to eliminate the need for installation work of a coaxial cable or the like. CONSTITUTION:A antenna 1 receiving an amplitude-modulated medium radio wave is installed to a roof top of an existing building. The radio wave received by the antenna 1 is amplified by a booster 2 to a sufficiently high level. The amplified radio wave is coupled with a common listening coaxial cable 5 via a coupler 3-1 and sent up to a predetermined floor. The propagation line is not limited to the cable 5 but a lighting line, a telephone line or a conductive pipe passing from the prescribed roof top till a ground floor may be used. When the common listening coaxial cable 5 is used for the wiring, the outer conductor is earthed respectively at the positions of the FM common listening booster 4 on the roof top and a front end 6 of the ground floor usually.

7. 发明专利

JPS62190989A SUPERHIGH-BAND SIGNAL TRANSMISSION SYSTEM 失效
公开(公告)号：JPS62190989A
公开(公告)日：1987-08-21
申请号：JP3258286
申请日：1986-02-17
申请人： MASPRO DENKO KK
发明人： ITO SHIGEKI
IPC分类号： H04B3/00 , H04H20/28 , H04H20/77 , H04H20/79 , H04H20/80 , H04N7/10
摘要： PURPOSE:To reduce the cost of an amplifier and to improve picture quality by sending a superhigh-band signal and other signals for CATV out of a head end, amplifying the signals to a wide band and sending them to a trunk line rear stage, and separating and sending the signals at nearly equal levels at a branching amplification part. CONSTITUTION:The superhigh-band signal passes through a high-pass filter 27 and is amplified by an amplifier 29 and sent out from a branch output terminal 6 at a level almost as high as an FM signal and a television VHF signal. The FM signal, VHF signal, and superhigh-band signal which are sent to a distribution line 9 are branched by a branching device 11 respectively and transmitted to a CAT converter 14 through a lead-in line 10. The superhigh-band signal is attenuated through the branch line 9 and lead-in line 10 more than any other signal. A frequency converting circuit 42, however, has a conversion gain, so respective signal levels are nearly equal in output of the converter 14 and a uniform picture can be viewed on a television receiver 15.

8. 实用新型

JPS6152856U JPS6152856U - 失效
公开(公告)号：JPS6152856U
公开(公告)日：1986-04-09
申请号：JP13743984
申请日：1984-09-11
IPC分类号： H04N7/10 , H04H20/00 , H04H20/08 , H04H20/63 , H04H20/74 , H04H20/80 , H04N5/00 , H04N7/16 , H04N7/20 , H04H1/00

9. 发明授权

US09667270B2 System, medium, and method of encoding/decoding multi-channel audio signals 有权
公开(公告)号：US09667270B2
公开(公告)日：2017-05-30
申请号：US14804939
申请日：2015-07-21
申请人： SAMSUNG ELECTRONICS CO., LTD.
发明人： Junghoe Kim , Miao Lei , Eunmi Oh
IPC分类号： G10L19/008 , G10L19/16 , H04S3/00 , H03M7/30 , H04H20/80
CPC分类号： H03M7/30 , G10L19/008 , G10L19/167 , H04H20/80 , H04S3/002 , H04S3/008 , H04S2420/03
摘要： An system, method, and method of encoding/decoding a multi-channel audio signal, including a decoding level generation unit producing decoding-level information that helps a bitstream including a number of audio channel signals and space information to be decoded into a number of audio channel signals, wherein the space information includes information about magnitude differences and/or similarities between channels, and an audio decoder decoding the bitstream according to the decoding-level information. Accordingly, even a single input bitstream can be decoded into a suitable number of channels depending on the type of a speaker configuration used. Scalable channel decoding can be achieved by partially decoding an input bitstream. In the scalable channel decoding, a decoder may set decoding levels and outputs audio channel signals according to the decoding levels, thereby reducing decoding complexity.

10. 发明授权

US5412415A Distribution of digitized composite AM FDM signals 失效
标题翻译：数字化复合AM FDM信号的分布
公开(公告)号：US5412415A
公开(公告)日：1995-05-02
申请号：US941066
申请日：1992-10-13
申请人： Andrew R. J. Cook , David W. Faulkner
发明人： Andrew R. J. Cook , David W. Faulkner
IPC分类号： H04H20/80 , H04N5/00 , H04N7/10 , H04N7/22 , H04N7/16
CPC分类号： H04N7/22
摘要： Signals, such as television signals, are distributed from a head-end station via a fibre network. The signals are amplitude modulated on carriers at different frequencies, and the different carriers combined to form a composite analogue signal. In the head-end station the composite analogue signal is clipped to reduce the peak-to-mean ratio and the clipped composite signal is digitized. The resulting digital data is transmitted onto the fibre network and is received at an optical receiver. The optical receiver reconstitutes the composite analogue signal for reception by a termination. In one example the composite analogue signal has a bandwidth of one octave or less, and is digitized by sampling at a sampling rate below the Nyquist rate.
摘要翻译： PCT No.PCT / GB91 / 00568 Sec。 371日期：1992年10月13日 102（e）日期1992年10月13日PCT 1991年4月10日PCT PCT。公开号WO91 / 15927 日期：1991年10月17日。信号，如电视信号，通过光纤网络从头端站分发。信号在不同频率的载波上进行幅度调制，并且不同载波组合形成复合模拟信号。在前端站中，复合模拟信号被削波以减小峰值平均比，并且限幅复合信号被数字化。所得到的数字数据被传送到光纤网络上，并在光接收器处被接收。光接收机通过终端重构复合模拟信号以进行接收。在一个示例中，复合模拟信号具有一个八度或更小的带宽，并且通过以低于奈奎斯特速率的采样速率采样进行数字化。

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