公开(公告)号：US08428186B1

公开(公告)日：2013-04-23

申请号：US12345630

申请日：2008-12-29

申请人： Peter Smidth

发明人： Peter Smidth

IPC分类号： H04L25/06

CPC分类号： H04L25/063

摘要： A method and apparatus for decoding a baseband signal of a radio signal removes, from the baseband signal, low-frequency and long-term noise that increases the possibility of decoding errors. The removal of low-frequency and long-term noise is performed by accumulating differences between the actual signal levels of the baseband signal and the expected signal levels for the baseband signal and subtracting the accumulated difference from the baseband signal before decoding. In one scheme, the baseband signal contains a predetermined training sequence of signal levels, where the differences between the actual signal levels of the baseband signal and the expected signal levels for the predetermined training sequence are accumulated. At the end of the training sequence, the accumulated training sequence difference is used as the accumulated difference and subtracted from the baseband signal, thereby providing stable operation for decoding signal levels that follow the training sequence.

摘要翻译： 用于解码无线电信号的基带信号的方法和装置从基带信号中去除了增加解码错误可能性的低频和长期噪声。 通过累积基带信号的实际信号电平和基带信号的预期信号电平之间的差异，并且在解码之前从基带信号中减去累加的差异来执行低频和长期噪声的去除。 在一个方案中，基带信号包含预定的信号电平训练序列，其中累积基带信号的实际信号电平与预定训练序列的预期信号电平之间的差。 在训练序列结束时，将累积的训练序列差用作累积差分，并从基带信号中减去，从而为训练序列后的信号电平提供稳定的操作。

公开(公告)号：US06861900B2

公开(公告)日：2005-03-01

申请号：US10034468

申请日：2001-12-27

申请人： Peter Smidth

发明人： Peter Smidth

IPC分类号： H04B7/26 ,  H03D3/00

CPC分类号： H04L27/0014 ,  H04L7/042 ,  H04L2027/0026

摘要： A method and apparatus are provided that performs timing acquisition for multiple radio terminals. According to one aspect of the present invention the invention includes receiving a sequence of symbols modulated onto a carrier frequency over a channel and demodulating the symbols using a clock frequency. The invention further includes determining a frequency offset of the received symbols with respect to the clock frequency and applying the determined frequency offset to adjust the clock frequency.

摘要翻译： 提供一种执行多个无线电终端的定时获取的方法和装置。 根据本发明的一个方面，本发明包括接收通过信道调制到载波频率上的符号序列，并使用时钟频率解调符号。 本发明还包括确定相对于时钟频率的接收符号的频率偏移，并应用所确定的频率偏移以调整时钟频率。

公开(公告)号：US5146324A

公开(公告)日：1992-09-08

申请号：US560606

申请日：1990-07-31

申请人： Sidney D. Miller ,  Peter Smidth ,  Charles H. Coleman

发明人： Sidney D. Miller ,  Peter Smidth ,  Charles H. Coleman

IPC分类号： H03M7/30 ,  G06T9/00 ,  H04N7/26 ,  H04N7/30

CPC分类号： H04N19/88 ,  H04N19/126 ,  H04N19/149 ,  H04N19/172 ,  H04N19/176 ,  H04N19/186 ,  H04N19/192 ,  H04N19/42 ,  H04N19/46 ,  H04N19/60 ,  H04N19/85 ,  H04N19/124 ,  H04N19/146

摘要： An image data compression technique is described which utilizes calculating means and a selected series of bit calculating stages having delays, to estimate one or more quantization parameters for such data. The estimation process preferably is iterated a number of times, with the values found through each estimation being used as the trial values for subsequent estimations. In addition, an initial trial value is selected by a data look ahead technique, which assures that its value is within range of the final quantization parameter used to quantize the data. The final quantization parameter insures that the compressed data fits within a predetermined number of encoded data bits to be transmitted or recorded, for example, in a recording medium.

公开(公告)号：US08611356B2

公开(公告)日：2013-12-17

申请号：US12618666

申请日：2009-11-13

申请人： Jungji Yu ,  Peter Smidth ,  Yongmin Zhang

发明人： Jungji Yu ,  Peter Smidth ,  Yongmin Zhang

IPC分类号： G01R31/08 ,  H04L12/28

CPC分类号： H04W28/08 ,  H04L12/413 ,  H04L47/10 ,  H04L47/125

摘要： A multi-radio device system includes a set of sending radio devices and a set of receiving radio devices. Among the sending radio devices is a load-balancing radio device that receives data packets from an originating network. The load-balancing radio device labels data packets with sequence numbers and distributes the labeled data packets among the sending radio devices based on the relative capacities and statuses of those sending radio devices. The sending radio devices transmit the labeled data packets to the receiving radio devices. The receiving radio devices send the labeled data packets to an aggregating radio device within the set of receiving radio devices. The aggregating radio device uses the sequence numbers to ensure that the data packets are forwarded to a destination network in the correct order, extracting original data packets from the labeled data packets before forwarding the original data packets on toward the destination network.

摘要翻译： 多无线电设备系统包括一组发送无线电设备和一组接收无线电设备。 发送无线电设备之中的一个负责平衡的无线电设备接收来自始发网络的数据包。 负载分担无线电设备标记具有序列号的数据包，并根据发送无线电设备的相对容量和状态在发送无线电设备之间分配标记的数据包。 发送无线电设备将标记的数据分组发送到接收无线电设备。 接收无线电设备将标记的数据分组发送到该组接收无线电设备内的聚合无线电设备。 汇聚无线电设备使用序列号确保数据分组以正确的顺序转发到目的网络，在将原始数据分组转发到目的网络之前从标记的数据分组中提取原始数据分组。

公开(公告)号：US08094767B1

公开(公告)日：2012-01-10

申请号：US11302102

申请日：2005-12-12

申请人： Peter Smidth

发明人： Peter Smidth

IPC分类号： H04L7/00 ,  H04L7/02 ,  H04L7/04 ,  H04L7/06

CPC分类号： H04L7/042 ,  H04L7/06

摘要： The present invention provides methods and systems for allowing a receiver in a (wireless) communication system to synchronize its timing and frequency subsystems in accordance with a received signal. In accordance with one aspect, a method is provided in which a relative time of arrival of sync values provided in a received signal are determined and used to align the receiver's reference signal(s) accordingly. Other aspects of the invention will become apparent from the detailed description of exemplary embodiments that follows.

摘要翻译： 本发明提供了允许（无线）通信系统中的接收机根据接收到的信号来同步其定时和频率子系统的方法和系统。 根据一个方面，提供了一种方法，其中确定在接收信号中提供的同步值的相对时间到达并且用于相应地对准接收机的参考信号。 从下面的示例性实施例的详细描述中，本发明的其它方面将变得显而易见。

公开(公告)号：US5301018A

公开(公告)日：1994-04-05

申请号：US106968

申请日：1993-08-16

申请人： Peter Smidth ,  Charles H. Coleman ,  Sidney D. Miller

发明人： Peter Smidth ,  Charles H. Coleman ,  Sidney D. Miller

IPC分类号： G06T9/00 ,  H04N5/907 ,  H04N5/92 ,  H04N5/926 ,  H04N7/26 ,  H04N7/30 ,  H04N7/12

CPC分类号： H04N5/9201 ,  H04N19/124 ,  H04N19/14 ,  H04N19/176 ,  H04N19/60 ,  H04N19/85 ,  H04N19/88 ,  H04N19/98 ,  H04N5/907 ,  H04N5/9264 ,  H04N19/146 ,  H04N19/149 ,  H04N19/15

摘要： In a data compression process such as employed to compress video or other data, it is preferable not to compress the image data representative of the video image in a sequential format, or to take the data from the same area of the image. To equalize the information content of the data prior to compression, the present shuffling/deshuffling technique divides the video image into a multitude of image representing blocks, and selects a predetermined number of the image blocks from different spatial locations in the image, to form a succession of data sets representative of the video image information. That is, the selection of the image representing blocks is such that the information content (complexity) in each data set is similar to the information content in each other data set and further similar to the average information content of the entire video image. Thus, the subsequent quantizing factor used in the compression process will tend to be similar for successive data sets, thereby reducing any distortion introduced by the compression process. The image representing blocks may be formed of sequentially scanned blocks of the video image, or of transform coefficients representing similar blocks of the video image. The shuffled data is deshuffled by the inverse process.

摘要翻译： 在诸如用于压缩视频或其他数据的数据压缩处理中，优选不以顺序格式压缩表示视频图像的图像数据，或者从图像的相同区域获取数据。 为了在压缩之前均衡数据的信息内容，本发明的混洗/去混洗技术将视频图像分割为表示块的多个图像，并且从图像中的不同空间位置中选择预定数量的图像块，以形成 连续的代表视频图像信息的数据集。 也就是说，图像表示块的选择使得每个数据集中的信息内容（复杂度）与彼此数据集中的信息内容相似，并且进一步类似于整个视频图像的平均信息内容。 因此，在压缩过程中使用的后续量化因子对于连续的数据集将倾向于相似，从而减少由压缩过程引入的任何失真。 图像表示块可以由视频图像的顺序扫描的块或表示视频图像的相似块的变换系数形成。 混洗数据通过逆过程进行混洗。

公开(公告)号：US08040870B1

公开(公告)日：2011-10-18

申请号：US12138239

申请日：2008-06-12

申请人： Peter Smidth ,  Yongmin Zhang ,  Jean-Laurent Plateau

发明人： Peter Smidth ,  Yongmin Zhang ,  Jean-Laurent Plateau

IPC分类号： H04J3/06

CPC分类号： H04J3/0638 ,  H04L7/0008

摘要： Radios synchronize their timing mechanisms using a timing signal that those radios propagate from one radio to another. Radios that are close to each other transmit only during times that none of the other nearby radios is trying to receive. In one scheme, a “master” radio initiates communication while another “slave” radio responds in a pre-determined manner. The master generates and propagates an inverted timing signal to the slave, which propagates approximately the same inverted timing signal to other radios in the slave's cluster. Each radio can be in one of three different modes: “source,” “auto,” and “recipient” modes. A “source” radio generates a timing signal independently. A “recipient” radio uses a received timing signal and forwards it to other radios. An “auto” radio behaves as a “recipient” radio while a timing signal is detectable, but behaves as a “source” radio if the timing signal is lost.

摘要翻译： 无线电使用这些无线电从一个无线电传播到另一个无线电的定时信号来同步其定时机制。 靠近彼此的无线电仅在其他附近无线电设备无法接收的时间内发送。 在一个方案中，“主”无线电发起通信，而另一个“从”）无线电以预定的方式进行响应。 主器件产生并传播反相定时信号到从器件，它将大致相同的反相定时信号传播到从器件的其他无线电器件中。 每个收音机可以是三种不同的模式：“源”，“自动”和“收信人”模式。 “源”无线电单独产生定时信号。 “收件人”无线电使用接收到的定时信号并将其转发到其他无线电。 如果定时信号丢失，则“自动”无线电作为“接收者”无线电，同时定时信号可被检测到，但表现为“源”无线电。

公开(公告)号：US5339108A

公开(公告)日：1994-08-16

申请号：US896511

申请日：1992-06-09

申请人： Charles H. Coleman ,  Sidney D. Miller ,  Peter Smidth

发明人： Charles H. Coleman ,  Sidney D. Miller ,  Peter Smidth

IPC分类号： H03M7/30 ,  G06T9/00 ,  H04N5/783 ,  H04N5/92 ,  H04N7/30 ,  H04N9/804 ,  H04N9/808 ,  H04N7/133

CPC分类号： H04N9/8047 ,  H04N19/30 ,  H04N19/60 ,  H04N5/783

摘要： Editing of information recovered from a relatively high speed communications medium such as a communications channel or magnetic tape often times allows only a portion of the information to be recovered. Storing information in complete segments from which portions of an image, called "snatches," may be recovered helps. An image signal is compressed in such a way that a snatch can be used during decompression to reconstruct a recognizable image from less than all the information that defines the image-thereby giving rise to the notion of a partially reconstructed image. The image information comprises several pixel data blocks with each block including sufficient pixel image data to reconstruct a portion of the image. The pixel data blocks are discrete cosine transformed ("dct") to generate a set of dct coefficient blocks. The dct coefficients for a group of dct coefficient blocks are rank ordered from highest visibility coefficient (corresponding to lowest dct frequency coefficient) to lowest visibility coefficient (corresponding to highest dct frequency coefficient), and then are quantized, entropy encoded, and formatted together with synchronization information and parity checks from the error correction encoding before being transmitted on a channel or recorded on magnetic tape. A decompression and reconstruction arrangement functions essentially as the inverse of the compression arrangement. It is during the decompression that snatches are retrieved and used to reconstruct a partial (video) image by using some but not necessarily all the dct coefficients that define the image.

摘要翻译： 经常从诸如通信信道或磁带的相对高速的通信介质中恢复的信息的编辑允许仅恢复一部分信息。 将信息存储在完整的段中，从而可以恢复称为“抓取”的图像的哪些部分。 图像信号被压缩，使得在解压缩期间可以使用抓取从小于定义图像的所有信息重建可识别的图像，从而产生部分重建的图像的概念。 图像信息包括若干像素数据块，每个块包括足够的像素图像数据以重构图像的一部分。 像素数据块是离散余弦变换（“dct”）以产生一组dct系数块。 一组dct系数块的dct系数是从最高可见度系数（对应于最低dct频率系数）到最低可见度系数（对应于最高dct频率系数）排列的顺序，然后被量化，熵编码和格式化以及 在频道上传输或记录在磁带上之前，进行纠错编码的同步信息和奇偶校验。 减压和重建装置基本上作为压缩装置的倒数起作用。 在解压缩期间，通过使用定义图像的一些但不一定全部dct系数来检索并用于重构部分（视频）图像。

公开(公告)号：US08295304B1

公开(公告)日：2012-10-23

申请号：US12345290

申请日：2008-12-29

申请人： Peter Smidth

发明人： Peter Smidth

IPC分类号： H04J3/16 ,  H04J3/24 ,  H04J3/06

CPC分类号： H04L47/24 ,  H04L1/0003 ,  H04L1/0017 ,  H04L12/54 ,  H04L47/50 ,  H04L47/6225 ,  H04W28/04 ,  H04W28/22 ,  H04W72/0446

摘要： When a signal-to-noise ratio affecting radio communication becomes sufficiently low, then the data transmission rate is responsively decreased in compensation. The signal-to-noise ratio of the communication link is thereby increased. Data for multiple different services is transmitted in data packets between two radios. By allocating one part, or time slot, of the data packet's payload to one service, and allocating another part, or time slot, of the data packet's payload to another service, communications sessions for multiple services can be maintained concurrently. Services are prioritized relative to each other. In case the signal-to-noise ratio becomes too low, data packet portions that are related to lower-priority services can be omitted from some data packets before those data packets are transmitted. Data remaining in the packet can be sent at a reduced data transmission rate without causing the quality of service for the remaining packets to fall below the minimum required level.

摘要翻译： 当影响无线电通信的信噪比变得足够低时，数据传输速率在补偿中被响应地减少。 因此，通信链路的信噪比增加。 用于多个不同服务的数据在两个无线电之间的数据分组中传输。 通过将数据分组的有效载荷的一个部分或时隙分配给一个服务，并且将数据分组的有效载荷的另一部分或时隙分配给另一个服务，可以同时维持多个服务的通信会话。 服务优先于彼此。 在信噪比变得过低的情况下，在发送这些数据分组之前，可以从一些数据分组中省略与低优先级业务相关的数据分组部分。 分组中剩余的数据可以以降低的数据传输速率发送，而不会导致剩余分组的服务质量低于最低要求级别。

公开(公告)号：US20110116443A1

公开(公告)日：2011-05-19

申请号：US12618666

申请日：2009-11-13

申请人： Jungji Yu ,  Peter Smidth ,  Yongmin Zhang

发明人： Jungji Yu ,  Peter Smidth ,  Yongmin Zhang

IPC分类号： H04W40/00 ,  H04L12/56

CPC分类号： H04W28/08 ,  H04L12/413 ,  H04L47/10 ,  H04L47/125

摘要： A multi-radio device system includes a set of sending radio devices and a set of receiving radio devices. Among the sending radio devices is a load-balancing radio device that receives data packets from an originating network. The load-balancing radio device labels data packets with sequence numbers and distributes the labeled data packets among the sending radio devices based on the relative capacities and statuses of those sending radio devices. The sending radio devices transmit the labeled data packets to the receiving radio devices. The receiving radio devices send the labeled data packets to an aggregating radio device within the set of receiving radio devices. The aggregating radio device uses the sequence numbers to ensure that the data packets are forwarded to a destination network in the correct order, extracting original data packets from the labeled data packets before forwarding the original data packets on toward the destination network.

摘要翻译： 多无线电设备系统包括一组发送无线电设备和一组接收无线电设备。 发送无线电设备之中的一个负责平衡的无线电设备接收来自始发网络的数据包。 负载分担无线电设备标记具有序列号的数据包，并根据发送无线电设备的相对容量和状态在发送无线电设备之间分配标记的数据包。 发送无线电设备将标记的数据分组发送到接收无线电设备。 接收无线电设备将标记的数据分组发送到该组接收无线电设备内的聚合无线电设备。 汇聚无线电设备使用序列号确保数据分组以正确的顺序转发到目的网络，在将原始数据分组转发到目的网络之前从标记的数据分组中提取原始数据分组。