专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2003023897A1 METHOD AND APPARATUS FOR BEAM STEERING IN A WIRELESS COMMUNICATIONS SYSTEMS 审中-公开
标题翻译：无线通信系统中光束转向的方法与装置
公开(公告)号：WO2003023897A1
公开(公告)日：2003-03-20
申请号：PCT/CA2002/001388
申请日：2002-09-12
申请人： REDLINE COMMUNICATIONS INC. , MOLDOVEANU, Calin , SARCA, Octavian, V. , SELEA, Radu
发明人： MOLDOVEANU, Calin , SARCA, Octavian, V. , SELEA, Radu
IPC分类号： H01Q1/24
CPC分类号： H04W16/28 , H01Q1/246 , H01Q3/24 , H01Q3/40 , H01Q25/00
摘要： A method and apparatus is provided that allows M transceivers to transmit/receive using M2 N distinct beams using passive beam steering. This provides for the use of arbitrary narrow beams with a number of transceivers that is a fraction of the number of beams but ensures 360 ° coverage. In other words it permits significant improvements in the link budget with a minimal rise in the cost of the BS. The apparatus includes M distribution switches applied 2 N passive beam forming networks each coupled to M antennas. The method and apparatus are compatible with TDMA in the downlink and in the uplink.
摘要翻译：提供了一种方法和装置，其允许M个收发器使用无源波束转向使用M2 个不同的波束发射/接收。这提供了使用具有多个收发器的任意窄波束，其是波束数量的一部分，但是确保360°覆盖。换句话说，它允许链路预算的显着改进，而BS的成本最小。该装置包括施加2个N个无源波束形成网络的M个分配开关，每个耦合到M个天线。该方法和装置在下行链路和上行链路中与TDMA兼容。

2. 发明申请

WO2003023898A1 METHOD AND APPARATUS FOR BEAM STEERING IN A WIRELESS COMMUNICATIONS SYSTEM 审中-公开
标题翻译：无线通信系统中光束转向的方法与装置
公开(公告)号：WO2003023898A1
公开(公告)日：2003-03-20
申请号：PCT/CA2002/001391
申请日：2002-09-12
申请人： REDLINE COMMUNICATIONS INC. , MOLDOVEANU, Calin , SARCA, Octavian, V. , SELEA, Radu
发明人： MOLDOVEANU, Calin , SARCA, Octavian, V. , SELEA, Radu
IPC分类号： H01Q1/24
CPC分类号： H04W16/28 , H01Q1/246 , H01Q3/24 , H01Q3/40 , H01Q25/00
摘要： A method and apparatus is provided that allows M transceivers to transmit/receive using M2 N distinct beams using passive beam steering. This provides for the use of arbitrary narrow beams with a number of transceivers that is a fraction of the number of beams but ensures 360° coverage. In other words it permits significant improvements in the link budget with a minimal rise in the cost of the BS. The apparatus includes M distribution switches applied to 2 N passive beam forming networks each coupled to M antennas. The method and apparatus are compatible with TDM in the downlink and TDMA in the uplink.
摘要翻译：提供了一种方法和装置，其允许M个收发器使用无源波束转向使用M2 个不同的波束发射/接收。这提供了使用具有多个收发器的任意窄波束，其是波束数目的一部分，但是确保360°覆盖。换句话说，它允许链路预算的显着改进，而BS的成本最小。该装置包括应用于每个耦合到M个天线的2 N个无源波束形成网络的M个分配开关。该方法和装置在下行链路中与TDM兼容，在上行链路中与TDMA兼容。

3. 发明申请

WO2003024048A3 HIERARCHICAL MODULATION 审中-公开
公开(公告)号：WO2003024048A3
公开(公告)日：2003-03-20
申请号：PCT/CA2002/001389
申请日：2002-09-12
申请人： REDLINE COMMUNICATIONS INC. , SARCA, Octavian, V.
发明人： SARCA, Octavian, V.
IPC分类号： H04L27/34
摘要： A method of hierarchically modulating and demodulating data, whereby a number of distinct data streams are encoded in a single symbol stream and subsequently into a single RF signal. At reception, hierarchical demodulation extracts these distinct data streams from the same RF signal. Each data stream provides a different level of protection against noise and interference and the difference between data streams can be controlled using a single parameter.

4. 发明申请

WO2003023983A1 METHOD AND APPARATUS FOR DIRECT DIGITAL TO RF CONVERSION USING PULSE SHAPING 审中-公开
标题翻译：使用脉冲形状的直接数字到RF转换的方法和装置
公开(公告)号：WO2003023983A1
公开(公告)日：2003-03-20
申请号：PCT/CA2002/001387
申请日：2002-09-12
申请人： REDLINE COMMUNICATIONS INC. , SARCA, Octavian, V.
发明人： SARCA, Octavian, V.
IPC分类号： H04B1/04
CPC分类号： H03D7/00 , H04B1/04 , H04B1/28
摘要： The invention described herein provides a method and apparatus that allows direct digital to IF/RF conversion using pulse-shaping. The method facilitates obtaining a flat or near flat output spectrum after digital to analog conversion with a minimal loss in signal energy. As opposed to pulse-shortening, where the DAC output pulse and consequently the energy per sample are reduced to a fraction a
摘要翻译：本文描述的本发明提供了允许使用脉冲整形直接进行数字到IF / RF转换的方法和装置。该方法有助于在数字到模拟转换之后以最小的信号能量损失获得平坦或接近平坦的输出频谱。与脉冲缩短相反，其中DAC输出脉冲和因此每个采样的能量减少到最大值的分数a <1，脉冲整形不会缩短DAC脉冲。对于每个采样，脉冲整形首先存储DAC传递的能量，然后在短时间内将存储的能量释放到输出。这样一来，即使对于非常小的值也没有信号能量损失。通过脉冲整形，输出脉冲的持续时间aT以类似于脉冲缩短的方式有助于光谱平坦度，但具有输出脉冲的形状对平坦光谱有显着贡献的附加益处。在使用两种类型的DAC的上下文中描述脉冲整形方法的两个实施例：一个具有电流输出，另一个具有电压输出。然后，针对单端电流输出DAC和差分电流输出DAC给出了脉冲整形实现的两个示例。

5. 发明申请

WO2003024042A1 METHOD AND APPARATUS FOR MULTIPLE RESOLUTION CARRIER OFFSET RECOVERY 审中-公开
标题翻译：用于多分辨率载波偏移恢复的方法和装置
公开(公告)号：WO2003024042A1
公开(公告)日：2003-03-20
申请号：PCT/CA2002/001390
申请日：2002-09-12
申请人： REDLINE COMMUNICATIONS INC. , SARCA, Octavian, V.
发明人： SARCA, Octavian, V.
IPC分类号： H04L27/00
CPC分类号： H04L27/0014 , H04L2027/0046 , H04L2027/0095
摘要： A carrier offset recovery method and apparatus are provided that use a dual sequence has a period N=2n that is less than a second sequence having a period M=2m. The apparatus includes an error corrector circuit that combines the range from one offset estimation with the precision of the other. To obtain a very large range for the carrier offset one can employ one or more additional stages. For example, one can use a sequence with a period of P=2p samples where P
摘要翻译：提供了使用双序列具有小于具有周期M = 2m的第二序列的周期N = 2n的载波偏移恢复方法和装置。该装置包括误差校正器电路，其组合来自一个偏移估计的范围与另一个的精度。为了获得载波偏移的非常大的范围，可以采用一个或多个附加级。例如，可以使用P = 2p个样本的序列，其中P

6. 发明申请

WO2003017607A3 ITERATIVE CALCULATION OF COEFFICIENTS FOR A MULTICARRIER EQUALISER 审中-公开
公开(公告)号：WO2003017607A3
公开(公告)日：2003-02-27
申请号：PCT/CA2002/001251
申请日：2002-08-13
申请人： REDLINE COMMUNICATIONS INC. , SARCA, Octavian, V.
发明人： SARCA, Octavian, V.
IPC分类号： H04L25/03
摘要： An multicarrier adaptive channel equalizer is provided, which has a coefficient adaptation branch that updates the filter coefficients based upon a weighted average of previous coefficient values and decisions for the current symbol. An override or nulling of the weighting factor is provided to mitigate the effects of noise on the current symbol. An embodiment of the OFDM adaptive channel equalizer requires only one coefficient memory port, and only two multipliers as in a non-adaptive equalizer thereby allowing a cost effective hardware implementation.

7. 发明申请

WO2003017560A1 RETRANSMISSION METHOD AND APPARATUS FOR WIRELESS COMMUNICATIONS SYSTEMS 审中-公开
标题翻译：无线通信系统的恢复方法和设备
公开(公告)号：WO2003017560A1
公开(公告)日：2003-02-27
申请号：PCT/CA2002/001252
申请日：2002-08-13
申请人： REDLINE COMMUNICATIONS INC. , SARCA, Octavian, V. , CRETU, Serban , PICU, Aurel, V.
发明人： SARCA, Octavian, V. , CRETU, Serban , PICU, Aurel, V.
IPC分类号： H04L1/00
CPC分类号： H04L1/1803 , H04L1/0002 , H04L1/1806 , H04L1/1809 , H04L1/1867
摘要： A wireless communications system method and apparatus transmits packet data at a first rate (R 1 ) selected to provide an acceptable packet error rate (PER) for a given wireless channel. Upon receipt of a request for retransmission of a data packet, the method and apparatus switch to a second rate (R 2 ), lower than the first rate, for retransmitting the data packet. The overall transmission rate becomes R 1 /(1+PER 1 R 1 /R 2 ), which is only slightly lower than that of the single rate retransmission R 1 /(1+ PER 1 ), but the resulting PER=PER 1 PER 2 is much smaller than PER 1 2 for the case of single rate retransmission.
摘要翻译：无线通信系统方法和装置以被选择为提供给定无线信道的可接受分组错误率（PER）的第一速率（R1）发送分组数据。在接收到重发数据分组的请求时，该方法和装置切换到低于第一速率的第二速率（R2），以重新发送数据分组。总传输速率为R1 /（1 + PER1R1 / R2），仅略低于单速率重传R1 /（1+ PER1），但是PER = PER1PER2的PER = PER1PER2比PER1 <2>小得多单速率重传的情况。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式