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1. 发明申请

WO2007124349A3 ROBUST WIRELESS HIGH-SPEED DATA SERVICES ACROSS AN HFC INFRASTRUCTURE USING WIRED DIVERSITY TECHNIQUES 审中-公开
标题翻译：使用有线多样性技术的HFC基础设施可靠的无线高速数据服务
公开(公告)号：WO2007124349A3
公开(公告)日：2008-11-27
申请号：PCT/US2007066948
申请日：2007-04-19
申请人： GEN INSTRUMENT CORP , HOWALD ROBERT L
发明人： HOWALD ROBERT L
IPC分类号： H04N7/173
CPC分类号： H04B7/082 , H04B7/0842 , H04N17/00
摘要： A system and method are provided for performing wireless diversity processing in a data-over-cable network. A diversity controller is provided which, based on signal-to-noise ratio, chooses an optimal path for receiving and transmitting data to and from a subscriber location. A stand-mounted access point enables wireless communication with subscriber locations. Diversity processing includes selection diversity, maximal rate combining, and equal gain combining.
摘要翻译：提供了一种用于在电缆数据网络中执行无线分集处理的系统和方法。提供一种分集控制器，其基于信噪比，选择用于从用户位置接收和发送数据的最佳路径。一个独立的接入点可以实现与用户位置的无线通信。分集处理包括选择分集，最大速率组合和等增益组合。

2. 发明申请

WO2004114058A2 DIGITAL SIGNAL PROCESSING SCHEME FOR HIGH PERFORMANCE HFC DIGITAL RETURN PATH SYSTEM WITH BANDWIDTH CONSERVATION 审中-公开
标题翻译：具有带宽保护功能的高性能HFC数字返回路径系统的数字信号处理方案
公开(公告)号：WO2004114058A2
公开(公告)日：2004-12-29
申请号：PCT/US2004/018337
申请日：2004-06-08
申请人： GENERAL INSTRUMENT CORPORATION, A CORPORATION OF THE STATE OF DELAWARE , ZHANG, Mao, Zhu , HOWALD, Robert, L.
发明人： ZHANG, Mao, Zhu , HOWALD, Robert, L.
IPC分类号： G06F
CPC分类号： H03M7/50 , H03M7/30 , H04N7/17309 , H04N7/22 , H04N21/6168
摘要： In a cable return path system, a method for performing digital companding adds a predetermined offset to the digital value to be companded, and employs a modified µ-law or a-law companding technique to obtain a reduced bit length digital value. One embodiment of this modified approach adds a predetermined offset (e.g., 129 for a 12-bit implementation) to the digital value before companding and then employs a two-bit chord and a 5-bit step for the 12-bit implementation. The end result is that the performance metrics are not significantly compromised by this bit reduction when compared to current transmission methods without this technique.
摘要翻译：在电缆返回路径系统中，用于执行数字压扩的方法对要压缩的数字值添加预定的偏移量，并采用修正的μ律或法律压扩技术来获得缩减的位长数字值。该修改的方法的一个实施例在压扩之前将预定偏移（例如，用于12位实现的129）添加到数字值，然后对于12位实现采用两位和弦和5位步长。最终的结果是，与没有这种技术的当前传输方法相比，性能度量不会被这个比特减少显着地损害。

3. 发明申请

WO2004114645A2 NARROWBAND INTERFERENCE AND IDENTIFICATION AND DIGITAL PROCESSING FOR CABLE TELEVISION RETURN PATH PERFORMANCE ENHANCEMENT 审中-公开
标题翻译：窄带干扰和识别和数字处理电缆电视返回路径性能提升
公开(公告)号：WO2004114645A2
公开(公告)日：2004-12-29
申请号：PCT/US2004/018309
申请日：2004-06-08
申请人： GENERAL INSTRUMENT CORPORATION , BOOTH, Ted, Nelson , HOWALD, Robert, L.
发明人： BOOTH, Ted, Nelson , HOWALD, Robert, L.
IPC分类号： H04N
CPC分类号： H04N7/102 , H04N7/17309 , H04N21/6118 , H04N21/6168
摘要： An adaptive data stream filter removes narrowband interference from the CATV return path prior to these paths being combined in the network. A method for removing narrowband interference from the CATV return path detects potential narrowband interference in real-time and adapts a filter to remove this potential narrowband interference. An exemplary embodiment of the above method uses previously created filters that are combined based on detected interference in an adaptive manner to continually adapt to new interference sources. Another exemplary embodiment of the above method calculates new filter coefficients for the data stream filter based on detected interference. In another embodiment, two filters are operated in a ping-pong manner for each band of interference identified as above threshold. This enables updating of one filter while another filter is performing the data stream filter operation.
摘要翻译：自适应数据流过滤器在网络中组合这些路径之前，从CATV返回路径中去除窄带干扰。用于从CATV返回路径去除窄带干扰的方法实时检测潜在的窄带干扰，并适配滤波器以去除该潜在的窄带干扰。上述方法的示例性实施例使用先前创建的滤波器，其基于检测到的干扰以自适应方式组合以连续适应新的干扰源。上述方法的另一示例性实施例基于检测到的干扰来计算数据流滤波器的新的滤波器系数。在另一个实施例中，对于被标识为上述阈值的每个干扰频带，以乒乓方式操作两个滤波器。这使得能够更新一个过滤器，而另一个过滤器正在执行数据流过滤器操作。

4. 发明申请

WO2004114058A3 DIGITAL SIGNAL PROCESSING SCHEME FOR HIGH PERFORMANCE HFC DIGITAL RETURN PATH SYSTEM WITH BANDWIDTH CONSERVATION 审中-公开
公开(公告)号：WO2004114058A3
公开(公告)日：2004-12-29
申请号：PCT/US2004/018337
申请日：2004-06-08
申请人： GENERAL INSTRUMENT CORPORATION, A CORPORATION OF THE STATE OF DELAWARE , ZHANG, Mao, Zhu , HOWALD, Robert, L.
发明人： ZHANG, Mao, Zhu , HOWALD, Robert, L.
IPC分类号： H03M7/38
摘要： In a cable return path system (70) a method for performing digital companding (72) add a predetermined offset (73) to digital value to be companded and employs a modified m-law or a-law companding technique to obtain reduced bit length digital value. One embodiment of this modified approach adds a predetermined offset (e.g., 129 for a 12-bit implementation) to the digital value before companding and then employs a two-bit chord and a 5-bit step for the 12-bit implementation. The end result is that the performance metrics are not significantly compromised by this reduction when compared to current transmission methods without this technique.

5. 发明申请

WO2007124349A2 ROBUST WIRELESS HIGH-SPEED DATA SERVICES ACROSS AN HFC INFRASTRUCTURE USING WIRED DIVERSITY TECHNIQUES 审中-公开
标题翻译：使用有线多样性技术的HFC基础设施可靠的无线高速数据服务
公开(公告)号：WO2007124349A2
公开(公告)日：2007-11-01
申请号：PCT/US2007/066948
申请日：2007-04-19
申请人： GENERAL INSTRUMENT CORPORATION , HOWALD, Robert L.
发明人： HOWALD, Robert L.
IPC分类号： H04N17/00
CPC分类号： H04B7/082 , H04B7/0842 , H04N17/00
摘要： A system and method are provided for performing wireless diversity processing in a data-over-cable network. A diversity controller is provided which, based on signal-to-noise ratio, chooses an optimal path for receiving and transmitting data to and from a subscriber location. A stand-mounted access point enables wireless communication with subscriber locations. Diversity processing includes selection diversity, maximal rate combining, and equal gain combining.
摘要翻译：提供了一种用于在电缆数据网络中执行无线分集处理的系统和方法。提供一种分集控制器，其基于信噪比，选择用于从用户位置接收和发送数据的最佳路径。一个独立的接入点可以实现与用户位置的无线通信。分集处理包括选择分集，最大速率组合和等增益组合。

6. 发明申请

WO2004114645A3 NARROWBAND INTERFERENCE AND IDENTIFICATION AND DIGITAL PROCESSING FOR CABLE TELEVISION RETURN PATH PERFORMANCE ENHANCEMENT 审中-公开
公开(公告)号：WO2004114645A3
公开(公告)日：2004-12-29
申请号：PCT/US2004/018309
申请日：2004-06-08
申请人： GENERAL INSTRUMENT CORPORATION , BOOTH, Ted, Nelson , HOWALD, Robert, L.
发明人： BOOTH, Ted, Nelson , HOWALD, Robert, L.
IPC分类号： H04N7/173
摘要： An adaptive data stream filter removes narrowband interference from the CATV return path prior to these paths being combined in the network. A method for removing narrowband interference from the CATV return path detects potential narrowband interference in real-time and adapts a filter to remove this potential narrowband interference. An exemplary embodiment of the above method uses previously created filters that are combined based on detected interference in an adaptive manner to continually adapt to new interference sources. Another exemplary embodiment of the above method calculates new filter coefficients for the data stream filter based on detected interference. In another embodiment, two filters are operated in a ping-pong manner for each band of interference identified as above threshold. This enables updating of one filter while another filter is performing the data stream filter operation.

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