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21.发明授权
公开(公告)号：US5680395A
公开(公告)日：1997-10-21
申请号：US515501
申请日：1995-08-15
CPC分类号： H04W36/0066 , H04W48/12
摘要： A method and apparatus for providing a reliable means to perform handoff from a code division multiple access (CDMA) system using a pilot signal to an alternative access technique system. Simple pilot box circuitry is added to a set of border base stations. The border base stations are base stations which operate only in the alternative access technique and which have coverage areas which are contiguous with coverage areas of CDMA operation base stations. The mobile unit monitors for the pilot signal from the border base stations in the same manner as it monitors for pilot signals from the CDMA operation base stations. When the mobile unit detects the pilot signal corresponding to a border base station, it notifies a system controller in accordance with standard operation. The system controller is aware that the pilot signal corresponds to a border base station and thus triggers a hard handoff process to the alternative access technique system in response thereto. The border base stations use a time division duplex technique to monitor a pilot and synchronization sequence from a neighboring one of the CDMA operation base stations to obtain an estimate of absolute system time.
摘要翻译： 一种用于提供从使用导频信号到替代接入技术系统的码分多址（CDMA）系统执行切换的可靠装置的方法和装置。 简单的导频箱电路被添加到一组边界基站。 边界基站是仅在替代接入技术中工作的基站，其具有与CDMA操作基站的覆盖区域相邻的覆盖区域。 移动单元以与监视来自CDMA操作基站的导频信号相同的方式监视来自边界基站的导频信号。 当移动单元检测到与边界基站相对应的导频信号时，它根据标准操作通知系统控制器。 系统控制器知道导频信号对应于边界基站，并因此触发对另一种接入技术系统的硬切换过程。 边界基站使用时分双工技术来监视来自相邻的CDMA操作基站的导频和同步序列，以获得绝对系统时间的估计。
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22.发明授权Power-of-two length pseudo-noise sequence generator with fast offset adjustment 失效功率二的长度伪噪声序列发生器，具有快速偏移调整
公开(公告)号：US5228054A
公开(公告)日：1993-07-13
申请号：US862687
申请日：1992-04-03
CPC分类号： H04J13/10 , G06F7/584 , H03K3/84 , H04J13/0022 , H04L9/0662 , G06F2207/581 , G06F2207/583 , H04L2209/046 , H04L2209/12
摘要： A maximal length linear sequence pseudorandom noise (PN) sequence generator for generating an augmented length PN sequence of length 2.sup.N. The PN generator includes circuitry for generating a PN sequence of length 2.sup.N -1 chips. A sequence augmenting circuit is included which inserts at least one additional chip in the PN sequence at a predetermined position within the PN sequence so as to provide an output of an augmented PN sequence of length 2.sup.N chips. The generator may also include sequence shifting circuitry which is responsive to a mask input for providing a predetermined shift in the output augmented PN sequence without incurring a transition period where the shifted output is invalid.
摘要翻译： 用于产生长度为2N的增强长度PN序列的最大长度线性序列伪随机噪声（PN）序列发生器。 PN发生器包括用于产生长度为2N-1个码片的PN序列的电路。 包括序列扩充电路，其在PN序列中的PN序列中的预定位置处插入至少一个附加芯片，以提供长度为2N个码片的增强PN序列的输出。 发生器还可以包括响应于掩模输入的顺序移位电路，用于在输出增强的PN序列中提供预定的移位，而不产生移位的输出无效的转换周期。
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23.发明授权Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communications system 失效用于减少在CDMA蜂窝通信系统中同时访问基站的移动站之间的消息冲突的装置和方法公开(公告)号：US07734260B2
公开(公告)日：2010-06-08
申请号：US11622383
申请日：2007-01-11
IPC分类号： 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.
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。
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24.发明授权Method and apparatus for integration of a wireless communication system with a cable television system 失效用于将无线通信系统与有线电视系统集成的方法和装置
公开(公告)号：US5839052A
公开(公告)日：1998-11-17
申请号：US600103
申请日：1996-02-08
IPC分类号： H04N7/173
CPC分类号： H04L12/2801 , H04B3/54 , H04W52/325 , H04B2203/5441 , H04B2203/5487 , H04N7/10 , H04W36/18 , H04W52/146
摘要： The present invention is a method and apparatus for integrating a personal communication system with a cable television plant. A set of radio antenna devices (RAD) are connected to the cable plant. The RADs provide frequency conversion and power control of signal received from the cable plant for wireless transmission to the remote units. The RADs also provide power control and frequency conversion of wireless signals received from the remote units for transmission by the RADs onto the cable plant. In addition to the functions of standard base stations and centralized controller, the CATV base station must also compensate for gain variations in the cable plant. The downstream power control is regulated by a RAD reference signal which can be hidden within the CDMA signal for maximum efficiency. The upstream power control is regulated by an upstream gain reference signal which is individually transmitted by each RAD on the upstream link.
摘要翻译： 本发明是用于将个人通信系统与有线电视设备集成的方法和装置。 一组无线电天线设备（RAD）连接到电缆设备。 RAD提供从电缆设备接收的信号的频率转换和功率控制，用于无线传输到远程单元。 RAD还提供从远程单元接收的无线信号的功率控制和频率转换，以将RAD传输到电缆设备上。 除了标准基站和集中控制器的功能外，CATV基站还必须补偿电缆厂的增益变化。 下行功率控制由可以隐藏在CDMA信号内的RAD参考信号来调节，以获得最大的效率。 上游功率控制由上游链路上的每个RAD单独发送的上游增益参考信号来调节。
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公开(公告)号：US5802105A
公开(公告)日：1998-09-01
申请号：US347526
申请日：1994-11-30
IPC分类号： H04L1/00 , H04B3/46 , H04B7/26 , H04B17/00 , H04L1/20 , H04L1/24 , H04L27/00 , H04L29/08 , H04L29/14
CPC分类号： H04L1/20 , H04L1/241 , H04L1/242 , H04L2027/0034
摘要： A system and method for testing signal transmission quality within a digital communication system is disclosed herein. The system may be incorporated within a digital cellular communication system in which information is exchanged over spread spectrum communication channels, among a plurality of mobile users, via at least one cell-site. The system contemplates testing a digital communication channel by transmitting a test sequence of digital data over the communication channel. The test sequence of digital data transmitted over the communication channel is received at a receiving station, within which is also generated a replica of the test sequence of digital data. The accuracy of transmission over the communication channel is then determined by comparing the replica of the test sequence of digital data to the test sequence of data received over the communication channel. The system allows the test sequence of digital data to be transmitted at one of a set of known data rates, with the receive station being disposed to identify the data rate associated with each test sequence of digital data. In a preferred implementation transmission of the test sequence involves generating a first plurality of data packets, which collectively comprise the test sequence of digital data. Each data packet is assigned one of a multiplicity of data rates in accordance with a first pseudorandom process, and is then transmitted at the data rate assigned thereto.
摘要翻译： 本文公开了一种用于测试数字通信系统内的信号传输质量的系统和方法。 该系统可以并入到数字蜂窝通信系统中，其中通过至少一个小区站点在多个移动用户之间通过扩频通信信道交换信息。 该系统考虑通过在通信信道上发送数字数据的测试序列来测试数字通信信道。 通过通信信道发送的数字数据的测试序列在接收站处被接收，在接收站中也产生数字数据的测试序列的副本。 然后通过将数字数据的测试序列的副本与通过通信信道接收的数据的测试序列进行比较来确定通信信道上的传输的准确性。 该系统允许数字数据的测试序列以一组已知数据速率中的一种传输，其中接收站被设置为识别与数字数据的每个测试序列相关联的数据速率。 在优选实施例中，测试序列的传输涉及生成第一多个数据分组，其共同地包括数字数据的测试序列。 每个数据分组根据第一伪随机过程分配多个数据速率中的一个，然后以分配给它的数据速率发送。
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公开(公告)号：US5504773A
公开(公告)日：1996-04-02
申请号：US171146
申请日：1993-12-21
IPC分类号： H04B1/707 , H04B1/7075 , H04B1/7115 , H04B7/005 , H04B7/26 , H04J3/16 , H04J3/22 , H04J3/24 , H04J11/00 , H04J13/00 , H04J13/18 , H04L1/00 , H04L1/08 , H04L5/02 , H04L5/12 , H04L7/04 , H04L23/02 , H04B1/69 , G06F11/00
CPC分类号： H04L1/0057 , H04B1/707 , H04B1/70757 , H04B7/2618 , H04B7/2628 , H04B7/2637 , H04J13/00 , H04J3/16 , H04J3/1688 , H04J3/22 , H04J3/24 , H04L1/0059 , H04L1/0065 , H04L1/0068 , H04L1/0071 , H04L1/08 , H04L23/02 , H04L5/02 , H04L5/12 , H04L7/048 , H04B1/7115 , H04B2201/70701 , H04B2201/70703 , H04J13/0048 , H04J13/18 , H04W52/26
摘要： In a digital communication system in which digital data is transmitted in data frames of a preselected time duration, a method and apparatus for formatting digital data in each data frame. A set of data bits of a first data type having a bit count corresponding to one of a plurality of predetermined bit counts are provided. A set of parity check bits for the set of data bits of said first data type are generated when the bit count is a highest bit count or a next to highest bit count. A set of tail bits is generated in accordance with a predetermined frame termination format. In respective order the set of data bits of the first data type, the parity check bits, and the tail bits are porovided in a data frame if the bit count is of the highest bit count or of the next to highest bit count. Otherwise, the set of data bits of the first data type and the tail bits are provided in respective order in the data frame.
摘要翻译： 在数字数据在预选持续时间的数据帧中发送的数字通信系统中，在每个数据帧中格式化数字数据的方法和装置。 提供具有对应于多个预定位计数之一的位计数的第一数据类型的一组数据位。 当比特计数是最高比特数或下一个最高比特数时，产生用于所述第一数据类型的数据比特组的一组奇偶校验位。 根据预定的帧终止格式生成一组尾比特。 如果比特数是最高比特数或下一个到最高比特数，则在相应的顺序中，如果第一数据类型，奇偶校验位和尾比特的数据比特的数据比特被排列在数据帧中。 否则，在数据帧中以相应的顺序提供第一数据类型和尾比特的数据比特组。
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公开(公告)号：US5142278A
公开(公告)日：1992-08-25
申请号：US620133
申请日：1990-11-30
CPC分类号： B61L15/0036 , B61L15/0072 , G08G1/127
摘要： An apparatus and method for providing communication of information between a truck tractor and trailer via existing truck wiring. At least one transmitter is located in each trailer for generating a unique identification signal representative of trailer identification information corresponding to the trailer in which the transmitter is located, modulating the identification signal, and providing the modulated identification on an existing truck power bus coupling the tractor and trailer. A receiver is located in the tractor for receiving each modulated identification signal on the power bus, demodulating each modulated identification signal and providing each demodulated identification signal to a mobile communications terminal located in the tractor for transmission to a central facility. The system may further include the transmission of trailer status or load status information by the transmitter to the receiver in a similar manner as the identification information.
摘要翻译： 一种用于通过现有卡车配线提供卡车拖拉机和拖车之间的信息通信的装置和方法。 至少一个发射器位于每个拖车中，用于产生代表对应于发射机所在的预告片的拖车识别信息的唯一标识信号，调制识别信号，以及将耦合拖拉机的现有卡车电力总线上的调制标识提供 和拖车。 接收机位于拖拉机中，用于接收电力总线上的每个调制的识别信号，解调每个调制的识别信号，并将每个解调的识别信号提供给位于拖拉机中的移动通信终端，以便传输到中央设施。 该系统可以进一步包括发射机以与识别信息相似的方式向接收机发送拖车状态或负载状态信息。
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28.发明授权Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a CDMA cellular communications system 失效用于减少在CDMA蜂窝通信系统中同时访问基站的移动站之间的消息冲突的装置和方法公开(公告)号：US07426391B2
公开(公告)日：2008-09-16
申请号：US11622403
申请日：2007-01-11
IPC分类号： H04Q7/20
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。
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公开(公告)号：US06985728B2
公开(公告)日：2006-01-10
申请号：US10457962
申请日：2003-06-10
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.
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公开(公告)号：US06687238B1
公开(公告)日：2004-02-03
申请号：US09265204
申请日：1999-03-10
申请人： Anthony C. K. Soong , Lindsay A. Weaver, Jr. , Brian K. Harms , Thomas J. Funk , Larry D. Flowers , Bruce S. Schwartz , Todd A. Pressley , Robin Night
发明人： Anthony C. K. Soong , Lindsay A. Weaver, Jr. , Brian K. Harms , Thomas J. Funk , Larry D. Flowers , Bruce S. Schwartz , Todd A. Pressley , Robin Night
IPC分类号： H04B7216
CPC分类号： H04W52/246 , H04B1/707 , H04B2201/70706 , H04W52/34 , H04W52/52
摘要： The invention is a CDMA transmission control technology that includes various combinations of the following functionality: decresting, in-band to out-of-band ratio (RIO), power control, and spectral shaping. Decresting reduces peaks in the CDMA signal. RIO generates a ratio based on the signal strength of in-band versus out-of-band portions of the CDMA signal. Power control adjusts the gain of the CDMA signal based on quadrature signal calculations. Spectral shaping attenuates in-band portions of the CDMA signal adjacent to the corner frequencies. The CDMA transmission control technology can be implemented in a CDMA base station to extend range and capacity.
摘要翻译： 本发明是一种CDMA传输控制技术，其包括以下功能的各种组合：衰减，带内到带外比（RIO），功率控制和频谱整形。 降频降低了CDMA信号的峰值。 RIO基于CDMA信号的带内与带外部分的信号强度产生比率。 功率控制基于正交信号计算来调整CDMA信号的增益。 频谱整形衰减与角频率相邻的CDMA信号的带内部分。 CDMA传输控制技术可以在CDMA基站中实现，以扩展范围和容量。
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