公开(公告)号：US5583853A

公开(公告)日：1996-12-10

申请号：US563876

申请日：1995-11-28

申请人： Thomas R. Giallorenzi ,  Mark T. Rafter ,  Kenneth C. Greenwood ,  Harry B. Press ,  Samuel C. Kingston

发明人： Thomas R. Giallorenzi ,  Mark T. Rafter ,  Kenneth C. Greenwood ,  Harry B. Press ,  Samuel C. Kingston

IPC分类号： H04B1/7085 ,  H04B1/7103 ,  H04J3/06 ,  H04J13/00 ,  H04J14/00 ,  H04J13/02 ,  H04L7/00

CPC分类号： H04J13/00 ,  H04B1/7085 ,  H04B1/7103 ,  H04J3/0682 ,  H04B2201/709709 ,  H04J14/005

摘要： A multipoint-to-point CDMA communication system comprises a plurality of CDMA transmitting stations and a single CDMA receiving station, all of which are intercoupled to each other over one CDMA channel and one feedback channel. On the one CDMA channel, the plurality of CDMA transmitting stations simultaneously send respective CDMA signals to the receiving station. In the receiving station, respective time differences are measured between a reference clock signal and the spreading codes in the CDMA signals from each of the CDMA transmitting stations; and these time differences are indicated in respective error signals which the CDMA receiving station sends on the feedback channel to each of the CDMA transmitting stations. Each CDMA station responds to its error signals by time shifting its spreading code such that it arrives in the receiving station in synchronization with the reference clock signal. This synchronization enables interference between the spreading codes at the receiving station to be reduced by using codes which have minimal cross-correlation when their time difference is zero; and consequently, the maximum number of stations that can simultaneously transmit is increased.

摘要翻译： 多点对点CDMA通信系统包括多个CDMA发射站和单个CDMA接收站，它们都通过一个CDMA信道和一个反馈信道相互耦合。 在一个CDMA信道上，多个CDMA发送站同时向接收站发送各自的CDMA信号。 在接收站中，在来自每个CDMA发射站的CDMA信号中的参考时钟信号和扩展码之间测量各自的时间差; 并且这些时间差在CDMA接收站在反馈信道上向每个CDMA发射站发送的各个误差信号中指示。 每个CDMA站通过对其扩展码进行时移来响应其误差信号，使得它们与参考时钟信号同步地到达接收站。 该同步使得当它们的时间差为零时，通过使用具有最小互相关的代码来减少接收站处的扩展码之间的干扰; 因此，可以同时发送的站的最大数量增加。

公开(公告)号：US5619492A

公开(公告)日：1997-04-08

申请号：US491033

申请日：1995-06-16

申请人： Harry B. Press ,  Thomas R. Giallorenzi ,  Mark T. Rafter

发明人： Harry B. Press ,  Thomas R. Giallorenzi ,  Mark T. Rafter

IPC分类号： H04B7/26 ,  H04J3/16 ,  H04J13/16 ,  H04J14/00 ,  H04L29/08 ,  H04J13/04

CPC分类号： H04J13/16 ,  H04B7/264 ,  H04J3/1694 ,  H04J14/005

摘要： A CDMA communication system is provided in which bit rates are dynamically allocated by a single CDMA receiving station to a plurality of CDMA transmitting stations, all of which are intercoupled to each other over a CDMA channel and a feedback channel. Each CDMA transmitting station includes a control circuit which sends control signals on the CDMA channel in spaced apart time intervals which request respective bit rates on the CDMA channel; and, the CDMA receiving station includes a bit rate allocating circuit which receives and responds to the control signals by sending feedback messages over the feedback channel that address individual CDMA transmitting stations and grant respective bit rates to the addressed station. In one preferred embodiment, each transmitting station includes a data buffer which stores a time varying number of data bytes that are to be sent, and each transmitting station requests respective bit rates on the CDMA channel by including that number in the control signals.

摘要翻译： 提供了一种CDMA通信系统，其中单个CDMA接收站动态地将比特率分配给多个CDMA发射台，所有CDMA发射台都通过CDMA信道和反馈信道相互耦合。 每个CDMA发射台包括一个控制电路，该控制电路在CDMA信道上以间隔的时间间隔发送控制信号，这些时间间隔请求CDMA信道上的各个比特率; 并且，CDMA接收站包括比特率分配电路，其通过在寻址各个CDMA发射台的反馈信道上发送反馈消息来接收并响应控制信号，并向所寻址的站授予相应的比特率。 在一个优选实施例中，每个发送站包括一个数据缓冲器，存储要发送的数据字节的时变数，并且每个发送站通过在控制信号中包括该数目来在CDMA信道上请求相应的比特率。

公开(公告)号：US5499236A

公开(公告)日：1996-03-12

申请号：US291648

申请日：1994-08-16

申请人： Thomas R. Giallorenzi ,  Mark T. Rafter ,  Kenneth C. Greenwood ,  Harry B. Press ,  Samuel C. Kingston

发明人： Thomas R. Giallorenzi ,  Mark T. Rafter ,  Kenneth C. Greenwood ,  Harry B. Press ,  Samuel C. Kingston

IPC分类号： H04B1/7085 ,  H04B1/7103 ,  H04J3/06 ,  H04J13/00 ,  H04J14/00 ,  H04J13/02 ,  H04L7/00

CPC分类号： H04J13/00 ,  H04B1/7085 ,  H04B1/7103 ,  H04J3/0682 ,  H04B2201/709709 ,  H04J14/005

摘要： A multipoint-to-point CDMA communication system comprises a plurality of CDMA transmitting stations and a single CDMA receiving station, all of which are intercoupled to each other over one CDMA channel and one feedback channel. On the one CDMA channel, the plurality of CDMA transmitting stations simultaneously send respective CDMA signals to the receiving station. In the receiving station, respective time differences are measured between a reference clock signal and the spreading codes in the CDMA signals from each of the CDMA transmitting stations; and these time differences are indicated in respective error signals which the CDMA receiving station sends on the feedback channel to each of the CDMA transmitting stations. Each CDMA station responds to its error signals by time shifting its spreading code such that it arrives in the receiving station in synchronization with the reference clock signal. This synchronization enables interference between the spreading codes at the receiving station to be reduced by using codes which have minimal cross-correlation when their time difference is zero; and consequently, the maximum number of stations that can simultaneously transmit is increased.

摘要翻译： 多点对点CDMA通信系统包括多个CDMA发射站和单个CDMA接收站，它们都通过一个CDMA信道和一个反馈信道相互耦合。 在一个CDMA信道上，多个CDMA发送站同时向接收站发送各自的CDMA信号。 在接收站中，在来自每个CDMA发射站的CDMA信号中的参考时钟信号和扩展码之间测量各自的时间差; 并且这些时间差在CDMA接收站在反馈信道上向每个CDMA发射站发送的各个误差信号中指示。 每个CDMA站通过对其扩展码进行时移来响应其误差信号，使得它们与参考时钟信号同步地到达接收站。 该同步使得当它们的时间差为零时，通过使用具有最小互相关的代码来减少接收站处的扩展码之间的干扰; 因此，可以同时发送的站的最大数量增加。

公开(公告)号：US06307833B1

公开(公告)日：2001-10-23

申请号：US09249895

申请日：1999-02-16

申请人： Keith R. Barker ,  Mark T. Rafter

发明人： Keith R. Barker ,  Mark T. Rafter

IPC分类号： H04L100

CPC分类号： H04B7/022 ,  H04B7/18523

摘要： Rain fade mitigation methods and data broadcast systems that provide improved performance in a rain fade environment. The systems distribute data derived from a transmitting processor by way of a data distribution system to one or more receivers located at remote locations. The transmitting processor may include forward error correction processing software that is used to add forward error correction bits to data packets to be transmitted. When error correction bits are added to the data prior to transmission, the receivers include forward error correction software that processes the received data packets to reconstruct the original data. Data packets with or without error correcting bits may be transmitted two times to the remote locations, which times are separated by a time delay having a duration that is related to a rain fade event, which time delay is sufficient to allow data reconstruction in the presence of the rain fade event. The data packets may also be transmitted to the remote locations at a relatively slow transmission rate such that the time required to transmit the data to the one or more remote locations is greater than or equal to the time necessary to transmit the data plus the amount of time equal to an average rain fade event. The data packets are received at the remote locations and appropriately processed to reconstruct the original data.

摘要翻译： 雨褪色缓解方法和数据广播系统，在降雨环境中提供改进的性能。 系统通过数据分配系统将从发送处理器得到的数据分配给位于远程位置的一个或多个接收器。 发送处理器可以包括前向纠错处理软件，其用于将前向纠错比特添加到要发送的数据分组。 当在传输之前将错误校正位添加到数据时，接收器包括处理接收的数据分组以重建原始数据的前向纠错软件。 具有或不具有纠错位的数据分组可以被发送到远程位置两次，这些时间被具有与雨褪色事件相关的持续时间的时间延迟分开，该时间延迟足以允许在存在时进行数据重建 的雨褪色事件。 数据分组也可以以相对较慢的传输速率发送到远程位置，使得将数据发送到一个或多个远程位置所需的时间大于或等于发送数据所需的时间加上 时间等于平均降雨事件。 数据包在远程位置被接收并被适当地处理以重建原始数据。

公开(公告)号：US06233252B1

公开(公告)日：2001-05-15

申请号：US09249889

申请日：1999-02-16

申请人： Keith R. Barker ,  Mark T. Rafter ,  Andrew D. Routley ,  Matthew B. Ashe

发明人： Keith R. Barker ,  Mark T. Rafter ,  Andrew D. Routley ,  Matthew B. Ashe

IPC分类号： H04J324

CPC分类号： H04L67/06 ,  H04L69/329 ,  H04N21/00

摘要： Systems and methods for transferring very large data files to a remote location. The systems and methods fragment the very large data file into smaller ordered blocks using file conversion software loaded onto a computer processor. The ordered fragmented files or blocks transmitted to the remote location using a data distribution system. For example, the data distribution system may include a transmitter, a satellite transmission link, and a receiver at each remote location. At each remote location, received ordered fragmented files or blocks are reassembled in accordance with the original ordering scheme using file conversion software loaded on a computer. This produces the original very large data file. Once the very large data file is reassembled, it may be processed or archived.

摘要翻译： 将非常大的数据文件传输到远程位置的系统和方法。 系统和方法使用加载到计算机处理器上的文件转换软件将大型数据文件分解成较小的有序块。 使用数据分发系统发送到远程位置的有序碎片文件或块。 例如，数据分配系统可以包括在每个远程位置的发射机，卫星传输链路和接收机。 在每个远程位置，使用加载在计算机上的文件转换软件，根据原始订购方案重新组装接收到的有序分段文件或块。 这产生了原始的非常大的数据文件。 一旦重新组合了非常大的数据文件，它可能被处理或归档。