-
公开(公告)号：US07313196B1
公开(公告)日：2007-12-25
申请号：US10608489
申请日：2003-06-26
IPC分类号： H04K1/02
CPC分类号： G06F7/4818 , H04L27/3809 , H04L27/389
摘要： A system for baseband amplitude limiting is provided. The system includes a CORDIC vector mode rotator device having an angle accumulator in addition to a gain device and limiter. The system also includes a second CORDIC rotator operating in rotation mode, and is coupled to the limiter.
摘要翻译： 提供了一种用于基带幅度限制的系统。 该系统包括除了增益装置和限制器之外还具有角度累加器的CORDIC矢量模式旋转器装置。 该系统还包括以旋转模式操作的第二个CORDIC旋转器，并连接到限制器。
-
22.发明授权公开(公告)号：US08073084B1
公开(公告)日：2011-12-06
申请号：US12691578
申请日：2010-01-21
IPC分类号： H03D1/00
CPC分类号： H04B1/7093 , H04B1/7075
摘要： An apparatus and method for correlating a signal over a correlation interval while accommodating spreading code frequency offset is described. In one embodiment, the apparatus includes a plurality of correlators, where each correlator forms a correlation result corresponding to a unique code frequency offset hypothesis. Each correlator selects samples from a tapped delay line at a tap position moved along the delay line at a rate corresponding to the correlator unique code frequency offset hypothesis.
摘要翻译： 描述了一种用于在适应扩展码频率偏移的同时在相关间隔上相关信号的装置和方法。 在一个实施例中，该装置包括多个相关器，其中每个相关器形成对应于唯一代码频率偏移假设的相关结果。 每个相关器以对应于相关器唯一代码频率偏移假设的速率沿着延迟线移动的抽头位置处的抽头延迟线选择样本。
-
公开(公告)号：US07944351B1
公开(公告)日：2011-05-17
申请号：US12350096
申请日：2009-01-07
IPC分类号： G08B1/08
CPC分类号： G08B25/016 , G08B25/014 , G08B29/28
摘要： An emergency locating system can include emergency transceivers and rescue transceivers. The emergency transceivers can be capable of repeat transmission of a distress message using a variable power level and variable spreading factor. A receive transceiver can be capable of receiving the distress messages and sending a confirmation message to the emergency transceiver. The emergency transceiver can be capable of receiving the confirmation message and terminating transmission of the distress message.
摘要翻译： 紧急定位系统可以包括应急收发器和救援收发器。 应急收发器能够使用可变功率电平和可变扩频因子重复发送遇险消息。 接收收发器能够接收遇险消息并向紧急收发机发送确认消息。 应急收发器能够接收确认消息并终止遇险消息的传输。
-
24.发明授权Correlation apparatus and method for accomodating spreading code frequency offset 有权用于适应扩频码频偏的相关装置和方法公开(公告)号：US07664164B1
公开(公告)日：2010-02-16
申请号：US11351465
申请日：2006-02-10
IPC分类号： H04B1/00
CPC分类号： H04B1/7093 , H04B1/7075
摘要： An apparatus and method for correlating a signal over a correlation interval while accommodating spreading code frequency offset is described. In one embodiment, the apparatus includes a plurality of correlators, where each correlator forms a correlation result corresponding to a unique code frequency offset hypothesis. Each correlator selects samples from a tapped delay line at a tap position moved along the delay line at a rate corresponding to the correlator unique code frequency offset hypothesis.
摘要翻译： 描述了一种用于在适应扩展码频率偏移的同时在相关间隔上相关信号的装置和方法。 在一个实施例中，该装置包括多个相关器，其中每个相关器形成对应于唯一代码频率偏移假设的相关结果。 每个相关器以对应于相关器唯一代码频率偏移假设的速率沿着延迟线移动的抽头位置处的抽头延迟线选择样本。
-
25.发明授权Digital communications method and system for communicating over channels with block fading and burst jamming 有权数字通信方法和系统，用于通过信道通过块衰落和突发干扰公开(公告)号：US07912156B1
公开(公告)日：2011-03-22
申请号：US10820347
申请日：2004-04-07
IPC分类号： H04L27/06
CPC分类号： H04L27/20 , H03M13/152 , H03M13/2906 , H03M13/2936 , H03M13/2957 , H03M13/373 , H03M13/63 , H04B7/18506 , H04L1/0045 , H04L1/0065 , H04L1/0066
摘要： Method and apparatus are disclosed for obtaining improved performance when using Forward Error Correction (FEC) with channels experiencing block fading or burst jamming over some number of contiguous symbols. One suitable application is when the channel is periodically obstructed due to the rotation of a propeller blade, resulting in a periodic block fading channel. During operation zero symbols are inserted into the received signal stream, prior to the FEC decoder at times that are estimated or otherwise determined to correspond to periods of jamming or severe fading. The zero symbols effectively “erase” the severely degraded symbols. The zero symbols are less detrimental to the FEC decoder than the severely degraded symbols, especially when the channel interleaving/de-interleaving operations result in the zero symbols being temporarily distributed over a large block of received symbols.
摘要翻译： 公开了用于在使用经过块衰落的信道的前向纠错（FEC）或在某些数量的连续符号上的突发干扰时获得改进的性能的方法和装置。 一个合适的应用是当通道由于螺旋桨叶片的旋转而周期性地阻塞时，导致周期性的块衰落通道。 在操作期间，在被估计或以其他方式确定为对应于干扰或严重衰落的周期的时间，在FEC解码器之前，零符号被插入到接收信号流中。 零符号有效地“抹除”严重退化的符号。 特别是当信道交织/解交织操作导致零符号临时分布在大块接收到的符号上时，零符号对FEC解码器的影响比严重降级的符号更不利。
-
公开(公告)号：US07634033B1
公开(公告)日：2009-12-15
申请号：US11351464
申请日：2006-02-10
IPC分类号： H04B1/10
CPC分类号： H04B1/7075
摘要： A system and method for detecting a spread spectrum encoded message within a received signal is described. The spread spectrum encoded message has an unknown code phase, unknown code frequency offset, and unknown carrier frequency offset. A plurality of code phase hypotheses, code frequency offset hypotheses, and carrier frequency offset hypotheses are searched in parallel. The unknown code phase, unknown code frequency offset, and unknown carrier frequency offset may also be estimated.
摘要翻译： 描述了用于在接收信号内检测扩频编码消息的系统和方法。 扩频编码消息具有未知码相位，未知码频率偏移和未知载波频率偏移。 并行搜索多个码相位假设，码频偏置假设和载波频偏估计。 还可以估计未知码相位，未知码频率偏移和未知载波频率偏移。
-
公开(公告)号：US07783936B1
公开(公告)日：2010-08-24
申请号：US11540134
申请日：2006-09-28
申请人： Eric K. Hall , Ayyoob Abbaszadeh , Richard Ertel
发明人： Eric K. Hall , Ayyoob Abbaszadeh , Richard Ertel
CPC分类号： G06F11/1008 , H03M13/2957 , H03M13/3972 , H03M13/6566
摘要： A technique for resolving access contention in a parallel turbo decoder is described. The technique includes associating a plurality of buffer memories with the subdecoders so that accesses to banks of a shared interleaver memory can be rescheduled. Accesses can be rescheduled to prevent simultaneous accesses to a single bank of the shared interleaver memory based on an interleaver pattern.
摘要翻译： 描述了用于解决并行turbo解码器中的访问争用的技术。 该技术包括将多个缓冲存储器与子解码器相关联，使得可以重新调度对共享交织器存储器的存储体的访问。 可以重新调度访问以防止基于交织器模式同时访问共享交织器存储器的单个存储体。
-
-
-
-
-
-
搜索结果
27 条记录 (耗时 0.021 秒)
