公开(公告)号：US20060121897A1

公开(公告)日：2006-06-08

申请号：US11328786

申请日：2006-01-09

申请人： Edward Tiedemann ,  Lindsay Weaver ,  Roberto Padovani

发明人： Edward Tiedemann ,  Lindsay Weaver ,  Roberto Padovani

IPC分类号： H04Q7/20 ,  H04B7/00

CPC分类号： H04W74/0841 ,  H04B1/707 ,  H04B1/7103 ,  H04B7/2628 ,  H04B2201/709709 ,  H04J13/0022 ,  H04J13/10 ,  H04J13/16 ,  H04L1/188 ,  H04L1/1887 ,  H04W52/48 ,  H04W52/50 ,  H04W74/002 ,  H04W74/08 ,  H04W74/0833 ,  H04W74/0866

摘要： Collisions between messages simultaneously transmitted by multiple spread-spectrum transmitters are reduced by distributing the transmissions over the available resources of the receiver. Each mobile station in a CDMA system uses one or more randomization methods to distribute its transmissions. In the first randomization, the mobile station time-delays its transmissions by a number of chips of the PN code with which it spreads the transmitted signal. In a second randomization, the mobile station randomly selects the PN code. In a third randomization, the mobile station inserts a random delay between successive message transmissions or probes if it does not receive an acknowledgement after a predetermined timeout period. A predetermined number of such transmissions is called a probe sequence. In a fourth randomization, the mobile station inserts a relatively long random delay between successive probe sequences if it does not receive an acknowledgement of any probe in the sequence.

公开(公告)号：US20070274267A1

公开(公告)日：2007-11-29

申请号：US11622403

申请日：2007-01-11

申请人： Edward Tiedemann ,  Lindsay Weaver ,  Roberto Padovani

发明人： Edward Tiedemann ,  Lindsay Weaver ,  Roberto Padovani

IPC分类号： H04B7/216

CPC分类号： H04W74/0841 ,  H04B1/707 ,  H04B1/7103 ,  H04B7/2628 ,  H04B2201/709709 ,  H04J13/0022 ,  H04J13/10 ,  H04J13/16 ,  H04L1/188 ,  H04L1/1887 ,  H04W52/48 ,  H04W52/50 ,  H04W74/002 ,  H04W74/08 ,  H04W74/0833 ,  H04W74/0866

摘要： Collisions between messages simultaneously transmitted by multiple spread-spectrum transmitters are reduced by distributing the transmissions over the available resources of the receiver. Each mobile station in a CDMA system uses one or more randomization methods to distribute its transmissions. In the first randomization, the mobile station time-delays its transmissions by a number of chips of the PN code with which it spreads the transmitted signal. In a second randomization, the mobile station randomly selects the PN code. In a third randomization, the mobile station inserts a random delay between successive message transmissions or probes if it does not receive an acknowledgement after a predetermined timeout period. A predetermined number of such transmissions is called a probe sequence. In a fourth randomization, the mobile station inserts a relatively long random delay between successive probe sequences if it does not receive an acknowledgement of any probe in the sequence.

摘要翻译： 通过在接收机的可用资源上分发传输来减少由多个扩频发射机同时发送的消息之间的冲突。 CDMA系统中的每个移动站使用一种或多种随机化方法来分发其传输。 在第一次随机化中，移动台通过PN码的多个码片对其发送进行时间延迟，并通过该芯片扩展发送的信号。 在第二随机化中，移动台随机选择PN码。 在第三次随机化中，如果移动台在预定的超时时段之后没有接收到确认，则在连续的消息传输或探测之间插入随机延迟。 预定数量的这种传输被称为探测序列。 在第四随机化中，如果移动台在序列中没有接收到任何探测器的确认，则在连续探测序列之间插入相对长的随机延迟。

公开(公告)号：US20070111680A1

公开(公告)日：2007-05-17

申请号：US11622383

申请日：2007-01-11

申请人： Edward Tiedemann ,  Lindsay Weaver ,  Roberto Padovani

发明人： Edward Tiedemann ,  Lindsay Weaver ,  Roberto Padovani

IPC分类号： H04B1/00 ,  H04B15/00 ,  H04B1/04

CPC分类号： H04W74/0841 ,  H04B1/707 ,  H04B1/7103 ,  H04B7/2628 ,  H04B2201/709709 ,  H04J13/0022 ,  H04J13/10 ,  H04J13/16 ,  H04L1/188 ,  H04L1/1887 ,  H04W52/48 ,  H04W52/50 ,  H04W74/002 ,  H04W74/08 ,  H04W74/0833 ,  H04W74/0866

摘要： Collisions between messages simultaneously transmitted by multiple spread-spectrum transmitters are reduced by distributing the transmissions over the available resources of the receiver. Each mobile station in a CDMA system uses one or more randomization methods to distribute its transmissions. In the first randomization, the mobile station time-delays its transmissions by a number of chips of the PN code with which it spreads the transmitted signal. In a second randomization, the mobile station randomly selects the PN code. In a third randomization, the mobile station inserts a random delay between successive message transmissions or probes if it does not receive an acknowledgement after a predetermined timeout period. A predetermined number of such transmissions is called a probe sequence. In a fourth randomization, the mobile station inserts a relatively long random delay between successive probe sequences if it does not receive an acknowledgement of any probe in the sequence.

公开(公告)号：US20060088134A1

公开(公告)日：2006-04-27

申请号：US11297264

申请日：2005-12-07

申请人： Klein Gilhousen ,  Irwin Jacobs ,  Roberto Padovani ,  Lindsay Weaver ,  Charles Wheatley ,  Andrew Viterbi

发明人： Klein Gilhousen ,  Irwin Jacobs ,  Roberto Padovani ,  Lindsay Weaver ,  Charles Wheatley ,  Andrew Viterbi

IPC分类号： H04B1/707 ,  H04L27/08

CPC分类号： H04L1/0002 ,  H04B1/707 ,  H04B1/70757 ,  H04B1/7115 ,  H04B7/2618 ,  H04B7/2628 ,  H04B7/2637 ,  H04B2201/70701 ,  H04B2201/70703 ,  H04J3/02 ,  H04J3/1688 ,  H04J3/22 ,  H04J13/0022 ,  H04J13/0048 ,  H04J13/12 ,  H04L1/0071 ,  H04L1/0072 ,  H04L1/06 ,  H04L1/08 ,  H04L5/02 ,  H04L5/12 ,  H04L23/02 ,  H04W52/08 ,  H04W52/10 ,  H04W52/26

摘要： A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link performance. With orthogonal PN codes, the cross-correlation is zero over a predetermined time interval, resulting in no interference between the orthogonal codes, provided only that the code time frames are time aligned with each other. In an exemplary embodiment, signals are communicated between a cell-site and mobile units using direct sequence spread spectrum communication signals. In the exemplary embodiment, transmit power of mobile unit signals is controlled based on signal power received by the mobile unit and power adjustment commands sent to the mobile unit.

摘要翻译： 一种使用扩频通信技术传送信息信号的系统和方法。 构造PN序列，以提供用户之间的正交性，从而减少相互干扰，从而允许更高的容量和更好的链路性能。 对于正交PN码，在相关的时间间隔内，互相关为0，导致正交码之间没有干扰，只要码时间帧彼此时间对准。 在示例性实施例中，使用直接序列扩频通信信号在小区站点和移动单元之间传送信号。 在示例性实施例中，基于由移动单元接收的信号功率和发送到移动单元的功率调整命令来控制移动单元信号的发射功率。