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：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：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。