公开(公告)号：US5319735A

公开(公告)日：1994-06-07

申请号：US808913

申请日：1991-12-17

申请人： Robert D. Preuss ,  Salim E. Roukos ,  A. W. F. Huggins ,  Herbert Gish ,  Marcos A. Bergamo ,  Patrick M. Peterson ,  Alan G. Derr

发明人： Robert D. Preuss ,  Salim E. Roukos ,  A. W. F. Huggins ,  Herbert Gish ,  Marcos A. Bergamo ,  Patrick M. Peterson ,  Alan G. Derr

IPC分类号： G10L19/00 ,  G11B20/00 ,  G11B20/10 ,  G11B20/18 ,  H03M5/04 ,  H04B1/66 ,  H04B1/707 ,  H04L5/00 ,  H04N5/92 ,  G10L3/00

CPC分类号： G11B20/00913 ,  G10L19/018 ,  G11B20/00086 ,  G11B20/10009 ,  G11B20/10527 ,  G11B20/1813 ,  H03M5/04 ,  H04B1/665 ,  H04B1/707

摘要： A code signal representing a sequence of code symbols carrying digital information is generated with the frequency components of the code signal being essentially confined to a preselected signalling band lying within the bandwidth of an audio signal within which the code signal is to be embedded. The audio signal is continuously frequency analyzed over a frequency band encompassing the signalling band and the code signal is dynamically filtered as a function of the analysis thereby to provide a modified code signal with frequency components which are, at each time instant, essentially a preselected small proportion of the levels of the corresponding audio signal frequency components. Accordingly, the modified code signal can be combined with the audio signal to obtain a composite audio signal which is not readily distinguishable from the original audio signal by listening. Furthermore, the digital information can be recovered from the composite audio signal by a procedure which is essentially the compliment of that used to obtain the composite audio signal.

摘要翻译： 产生代表携带数字信息的码元序列的代码信号，其中代码信号的频率分量基本上被限制在位于要嵌入代码信号的音频信号的带宽内的预选信令频带。 音频信号在包围信令频带的频带上被连续频率分析，并且代码信号作为分析的函数被动态滤波，从而提供具有频率分量的修改的码信号，频率分量基本上是预选小的 相应音频信号频率分量的比例。 因此，可以将修改的代码信号与音频信号组合以获得不容易通过收听与原始音频信号区分的复合音频信号。 此外，可以通过本质上是用于获得复合音频信号的补充的过程从复合音频信号中恢复数字信息。

公开(公告)号：US07155263B1

公开(公告)日：2006-12-26

申请号：US10787215

申请日：2004-02-27

申请人： Marcos A. Bergamo

发明人： Marcos A. Bergamo

IPC分类号： H04M1/00 ,  H04B1/38

CPC分类号： H04W52/0229 ,  Y02D70/164 ,  Y02D70/22

摘要： A burst of data in a wireless network includes a preamble [502], a postamble [504] and one or more blocks of data [506]. A low or no power receiving device [102] receives the preamble [502]. When the preamble [502] includes an ID of the receiving device, structural information of the burst is derived from the preamble [502], indicating when at least one component of the device is to be powered on to receive the at least one block of data [506] included in the burst. The at least one component [306, 308, 310] is powered on at a first time period in order to receive the data in the one or more blocks of data. The at least one component [306, 308, 310] is powered off at a specific time period from a beginning of the first time period. The powering on and off are repeated for each of the one or more blocks of data [506] in the burst.

摘要翻译： 无线网络中的数据突发包括前导码[502]，后同步码[504]和一个或多个数据块[506]。 低功率或无功率接收设备[102]接收前导码[502]。 当前导码[502]包括接收设备的ID时，从前导码[502]导出突发的结构信息，指示何时将设备的至少一个组件接通电源以接收至少一个 包含在突发中的数据[506]。 至少一个组件[306,308,310]在第一时间段通电，以便接收一个或多个数据块中的数据。 至少一个组件[306,308,310]在从第一时间段开始的特定时间段被断电。 在突发中的一个或多个数据块[506]中的每一个重复上电和断电。

公开(公告)号：US08027289B2

公开(公告)日：2011-09-27

申请号：US11115637

申请日：2005-04-27

申请人： Subramanian Ramanathan ,  Marcos A. Bergamo ,  Brig B. Elliott

发明人： Subramanian Ramanathan ,  Marcos A. Bergamo ,  Brig B. Elliott

IPC分类号： H04W4/00 ,  H04B7/216 ,  H04L12/66 ,  H04L12/28

CPC分类号： H04W40/00 ,  H04L45/34 ,  H04L45/566

摘要： The systems and methods described herein include, among other things, processes for providing low latency packet transport in ad hoc networks. To this end, the systems, in certain embodiments, employ an architecture for communication nodes in MANETs, in which the delay introduced in “routing” or “relaying” the packet is reduced. In these systems invention, the data plane of the OSI stack at relay nodes is collapsed so that bits entering the node are re-energized “on-the-fly”, with only a brief pause. A transit key in each packet, inserted by the originator of the packet, is used to index into a transit table to determine one of three actions to perform—drop, keep, or retransmit the packet. A control plane determines, for each packet, whether it should be re-energized or not. The control algorithm ensures that only nodes along the path from the source to the destination re-energize (relay) the packet.

摘要翻译： 除了别的以外，本文描述的系统和方法还包括用于在自组织网络中提供低延迟分组传输的过程。 为此，在某些实施例中，系统采用MANET中的通信节点的架构，其中在“路由”或“中继”分组中引入的延迟被减少。 在这些系统的发明中，中继节点处的OSI堆栈的数据平面被折叠，使得进入该节点的比特被“动态”重新通电，只有短暂的暂停。 由分组的发起者插入的每个分组中的传输密钥用于索引到传输表中，以确定执行丢弃，保留或重传数据包的三个动作之一。 对于每个分组，控制平面确定是否应该被重新通电。 控制算法确保沿着从源到目的地的路径只有节点重新启动（中继）数据包。