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. 发明授权

US08509835B2 Reverse link initial power setting using effective radiated power message to compute path loss 有权
公开(公告)号：US08509835B2
公开(公告)日：2013-08-13
申请号：US10401115
申请日：2003-03-26
申请人： George R. Nelson, Jr. , James A. Proctor, Jr. , John E. Hoffmann , Antoine J. Rouphael
发明人： George R. Nelson, Jr. , James A. Proctor, Jr. , John E. Hoffmann , Antoine J. Rouphael
IPC分类号： H04B7/00
摘要： In an illustrative embodiment of the present invention, a reference signal including pilot information is transmitted from a base station to one or multiple field units over a pilot channel. A message is also sent to the field units over a paging channel to indicate an effective radiated power level at which the reference signal is transmitted on the pilot channel. Based on a received power level of the reference signal at a field unit and the effective radiated power level of the reference signal, a forward path loss is estimated at the field unit for the forward link between the base station and field unit. Assuming the path loss in the reverse link is approximately the same as the estimated forward link path loss, the field unit can transmit, a reply message in the reverse link so that the base station generally receives a message at a desired power level.

2. 发明授权

US06545994B2 Access probe acknowledgment including collision detection to avoid oversetting initial power level 有权
标题翻译：访问探测确认，包括碰撞检测，以避免初始功率级别过大
公开(公告)号：US06545994B2
公开(公告)日：2003-04-08
申请号：US09792410
申请日：2001-02-23
申请人： George R. Nelson, Jr. , James A. Proctor, Jr. , John E. Hoffmann , Antoine J. Rouphael
发明人： George R. Nelson, Jr. , James A. Proctor, Jr. , John E. Hoffmann , Antoine J. Rouphael
IPC分类号： H04B7212
CPC分类号： H04W52/242 , H04L1/1607 , H04L12/5602 , H04L47/14 , H04L47/26 , H04L2001/0093 , H04W24/00 , H04W52/228 , H04W52/48 , H04W52/50 , H04W74/0825 , H04W74/0858
摘要： In an illustrative embodiment of the present invention, a first channel is allocated for transmitting sporadically generated messages from multiple field units to a base station. The first channel is preferably divided into time slots in which a field unit transmits an access request message to the base station for establishing a communication link. In response to an access request message, feedback information is provided from the base station to multiple field units indicating whether a collision was detected on the first channel for a message transmitted in a previous time slot. In an instance when a collision is detected, the field unit will re-transmit an access request message at a previous power level setting based on a random back off time. If no collision is detected and the base station fails to transmit an acknowledgment message from the base station to the access requesting field unit, the power output level of the field unit is increased for successive message transmissions until the message is received.
摘要翻译：在本发明的说明性实施例中，分配第一信道用于将来自多个场单元的偶发生成的消息发送到基站。第一信道优选地被划分为时隙，其中，场单元向基站发送接入请求消息以建立通信链路。响应于访问请求消息，反馈信息从基站提供给多个字段单元，指示在第一信道上是否检测到在先前时隙中发送的消息的冲突。在检测到冲突的情况下，场单元将基于随机退避时间在先前功率电平设置下重新发送接入请求消息。如果没有检测到冲突，并且基站无法从基站向接入请求字段单元发送确认消息，则对于连续的消息传输增加了现场单元的功率输出电平，直到接收到消息。

3. 发明授权

US08830977B2 Reverse link pilot integrated with block codes 有权
标题翻译：反向链路导频与块码集成
公开(公告)号：US08830977B2
公开(公告)日：2014-09-09
申请号：US13311151
申请日：2011-12-05
申请人： John E. Hoffmann , George R. Nelson, Jr. , James A. Proctor, Jr. , Antoine J. Rouphael
发明人： John E. Hoffmann , George R. Nelson, Jr. , James A. Proctor, Jr. , Antoine J. Rouphael
IPC分类号： H04L7/04 , H04J13/00 , H04L1/00 , H04L27/26 , H04B1/707 , H04B7/26 , H04L5/00
CPC分类号： H04L5/005 , H04B1/707 , H04B7/2628 , H04B2201/70701 , H04L1/0041 , H04L1/0063 , H04L1/0065 , H04L1/0066 , H04L1/0071 , H04L5/0048 , H04L27/183 , H04L27/2657 , H04L27/2662
摘要： A technique for encoding digital communication signals. Data symbols are augmented in pilot symbols inserted at predetermined positions. The pilot augmented sequence is then fed to a deterministic error correction block encoder, such as a turbo product coder, to output a coded sequence. The symbols in the error correction encoded sequence are then rearranged to ensure that the output symbols derived from input pilot symbols are located at regular, predetermined positions. As a result, channel encoding schemes can more easily be used which benefits from power of two length block sizes.
摘要翻译：一种用于编码数字通信信号的技术。数据符号在插入预定位置的导频符号中增加。导频增强序列然后被馈送到诸如turbo乘积编码器的确定性纠错块编码器，以输出编码序列。然后重新排列纠错编码序列中的符号，以确保从输入导频符号导出的输出符号位于规则的预定位置。结果，可以更容易地使用信道编码方案，其受益于两个长度块大小的功率。

4. 发明授权

US08315294B2 Method for searching pilot signals to synchronize a CDMA receiver with an associated transmitter 有权
标题翻译：用于搜索导频信号以使CDMA接收机与相关联的发射机同步的方法
公开(公告)号：US08315294B2
公开(公告)日：2012-11-20
申请号：US13073594
申请日：2011-03-28
申请人： James A. Proctor, Jr. , Antoine J. Rouphael , John E. Hoffmann , George R. Nelson, Jr.
发明人： James A. Proctor, Jr. , Antoine J. Rouphael , John E. Hoffmann , George R. Nelson, Jr.
IPC分类号： H04B1/38
CPC分类号： H04W56/001 , H04B1/7075 , H04B1/70775 , H04B1/7103 , H04B7/086 , H04B2201/70701 , H04L27/2273 , H04L2027/0057 , H04L2027/0087
摘要： A method for synchronizing a CDMA receiver to a transmitter when an adaptive antenna is utilized to receive transmitted data, wherein a receiving antenna system is adapted between a 360° reception angle pattern (i.e., an omni-directional pattern) and a fixed reception angle (i.e., a directional pattern) by permitting the receiver to identify a pilot signal having the largest magnitude. The receiver minimizes interference from other pilot signals by steering antenna pattern nulls toward other transmitters. As a result, the time required for the receiver to acquire a valid pilot signal is significantly reduced.
摘要翻译：一种当使用自适应天线来接收发射数据时将CDMA接收机同步到发射机的方法，其中接收天线系统适应于360°接收角度模式（即，全向模式）和固定接收角度即，方向图），通过允许接收机识别具有最大幅度的导频信号。接收器通过向其他发射机转向天线图形零点来最小化来自其他导频信号的干扰。结果，接收机获取有效导频信号所需的时间显着减少。

5. 发明授权

US08811367B2 Qualifying available reverse link coding rates from access channel power setting 有权
标题翻译：从接入信道功率设置合格的可用的反向链路编码率
公开(公告)号：US08811367B2
公开(公告)日：2014-08-19
申请号：US11295270
申请日：2005-12-06
申请人： George Rodney Nelson, Jr. , James A. Proctor, Jr. , John E. Hoffmann , Antoine J. Rouphael
发明人： George Rodney Nelson, Jr. , James A. Proctor, Jr. , John E. Hoffmann , Antoine J. Rouphael
IPC分类号： H04B7/216
CPC分类号： H04W72/042 , H04J13/00 , H04J13/0003 , H04L5/22 , H04W24/00 , H04W28/22 , H04W48/08 , H04W52/24 , H04W52/26 , H04W52/365 , H04W72/0406 , H04W72/0446 , H04W72/0466 , H04W72/0473 , H04W72/048 , H04W72/1289 , Y02D70/00
摘要： Data rate allocation decisions are made for a communications channel. A message is sent on a communication channel such as on a paging channel. The message indicates a forward Effective Radiate Power (ERP) of a pilot signal transmitted. The remote station then determines the received signal strength of this pilot signal, taking into account receiver gains. The path loss may be estimated as the difference between the forward ERP data value received and the detected received pilot power. This transmit power level information is encoded as a digital data word together with the forward path loss information. Upon transmission, the forward path loss estimate as calculated and the output power value can then help determine the amount of excess power available. This is indicative of the amount of dynamic range available in the transmit power amplifier. Coding rates which require a higher dynamic range may be acceptable for use.
摘要翻译：对通信信道进行数据速率分配决定。在诸如寻呼信道的通信信道上发送消息。该消息表示发送的导频信号的前向有效辐射功率（ERP）。然后，远程站在考虑到接收机增益的情况下确定该导频信号的接收信号强度。可以将路径损耗估计为所接收的前向ERP数据值与检测到的接收导频功率之间的差。该发送功率电平信息与前向路径损耗信息一起被编码为数字数据字。在传输时，计算出的前向路径损耗估计值和输出功率值可以帮助确定可用的多余功率量。这表示发射功率放大器中可用的动态范围的量。需要更高动态范围的编码速率可能是可以接受的。

6. 发明授权

US07145964B2 Maximizing data rate by adjusting codes and code rates in CDMA system 有权
公开(公告)号：US07145964B2
公开(公告)日：2006-12-05
申请号：US11264847
申请日：2005-11-02
申请人： John E. Hoffmann , George Rodney Nelson, Jr. , Daniel I. Riley , Antoine J. Rouphael , James A. Proctor, Jr.
发明人： John E. Hoffmann , George Rodney Nelson, Jr. , Daniel I. Riley , Antoine J. Rouphael , James A. Proctor, Jr.
IPC分类号： H04L27/36
CPC分类号： H04L1/0048 , G11B20/1833 , H03M13/35 , H04B1/707 , H04J13/00 , H04L1/0003 , H04L1/0007 , H04L1/0009 , H04L1/0025 , H04L1/1809 , H04L1/1816 , H04L25/14 , H04L27/22 , H04L27/38 , H04L2001/0093 , H04L2001/0096
摘要： The present invention provides for making code rate adjustments and modulation type adjustments in a pseudonoise (PN) encoded CDMA system. Coding rate adjustments may be made by changing the number of information bits per symbol, or Forward Error Code (FEC) coding rate. A forward error correction (FEC) block size is maintained at a constant amount. Therefore, as the number of information bits per symbol are increased, an integer multiple of bits per epoch is always maintained. The scheme permits for a greater flexibility and selection of effective data rates providing information bit rates ranging from, for example, approximately 50 kilobits per second to over 5 mega bits per second (Mbps) in one preferred embodiment.

7. 发明授权

US07502424B2 Maximizing data rate by adjusting codes and code rates 有权
标题翻译：通过调整代码和代码率来最大化数据速率
公开(公告)号：US07502424B2
公开(公告)日：2009-03-10
申请号：US11633970
申请日：2006-12-05
申请人： John E. Hoffmann , George Rodney Nelson, Jr. , Daniel I. Riley , Antoine J. Rouphael , James A. Proctor, Jr.
发明人： John E. Hoffmann , George Rodney Nelson, Jr. , Daniel I. Riley , Antoine J. Rouphael , James A. Proctor, Jr.
IPC分类号： H04L27/06
CPC分类号： H04L1/0048 , G11B20/1833 , H03M13/35 , H04B1/707 , H04J13/00 , H04L1/0003 , H04L1/0007 , H04L1/0009 , H04L1/0025 , H04L1/1809 , H04L1/1816 , H04L25/14 , H04L27/22 , H04L27/38 , H04L2001/0093 , H04L2001/0096
摘要： The present invention provides for making code rate adjustments and modulation type adjustments in a pseudonoise (PN) encoded CDMA system. Coding rate adjustments may be made by changing the number of information bits per symbol, or Forward Error Code (FEC) coding rate. A forward error correction (FEC) block size is maintained at a constant amount. Therefore, as the number of information bits per symbol are increased, an integer multiple of bits per epoch is always maintained. The scheme permits for a greater flexibility and selection of effective data rates providing information bit rates ranging from, for example, approximately 50 kilobits per second to over 5 mega bits per second (Mbps) in one preferred embodiment.
摘要翻译：本发明提供了在伪噪声（PN）编码的CDMA系统中进行码率调整和调制类型调整。可以通过改变每个符号的信息比特数或转发错误码（FEC）编码率来进行编码速率调整。前向纠错（FEC）块大小保持恒定的量。因此，随着每个符号的信息位的数量增加，始终保持每个时期的位的整数倍。在一个优选实施例中，该方案允许更大的灵活性和有效数据速率的选择，从而提供从例如大约50千比特每秒到超过5兆比特每秒（Mbps）的信息比特率。

8. 发明授权

US07483473B2 Access channel structure for wireless communication system 有权
标题翻译：无线通信系统的接入信道结构
公开(公告)号：US07483473B2
公开(公告)日：2009-01-27
申请号：US11103202
申请日：2005-04-11
申请人： John E. Hoffmann , George Rodney Nelson, Jr. , James A. Proctor, Jr. , Antoine J. Rouphael
发明人： John E. Hoffmann , George Rodney Nelson, Jr. , James A. Proctor, Jr. , Antoine J. Rouphael
IPC分类号： H04L27/30
CPC分类号： H04L5/0046 , H04B1/707 , H04B2201/70701 , H04L7/041
摘要： A technique for efficient implementation of pilot signals on a reverse link in a wireless communication system. An access channel is defined for the reverse link such that within each frame, or epoch, a portion is dedicated to sending only pilot symbols. Another portion of the frame is reserved for sending mostly data symbols; however, within this second portion of the frame, additional pilot symbols are interleaved among the data symbols. The pilot symbol or preamble portion of the access channel frame allows for efficient acquisition of the access signal at the base station, while providing a timing reference for determining the effects of multipath fading. In particular, a pilot correlation filter provides a phase estimate from the pilot symbols in the preamble portion, which is then used to decode the data symbols in the payload portion. An access acquisition portion of the receiver uses the phase estimates provided by the pilot correlation filter to process the output of a data symbol correlation filter. The additional pilot symbols embedded in the payload portion are used in a cross product operation to further resolve the effects of multipath fading.
摘要翻译：一种在无线通信系统中在反向链路上有效实现导频信号的技术。为反向链路定义了一个接入信道，使得在每个帧或时期内，一部分专用于仅发送导频符号。帧的另一部分保留用于主要发送数据符号; 然而，在帧的该第二部分内，在数据符号之间交织附加的导频符号。访问信道帧的导频符号或前导码部分允许在基站处有效地获取接入信号，同时提供用于确定多径衰落的影响的定时参考。具体地，导频相关滤波器从前导码部分中的导频符号提供相位估计，然后该导频符号用于解码有效载荷部分中的数据符号。接收机的访问获取部分使用由导频相关滤波器提供的相位估计来处理数据符号相关滤波器的输出。嵌入在有效载荷部分中的附加导频符号用于交叉乘积运算，以进一步解决多路径衰落的影响。

9. 发明授权

US07079523B2 Maintenance link using active/standby request channels 失效
公开(公告)号：US07079523B2
公开(公告)日：2006-07-18
申请号：US09775305
申请日：2001-02-01
申请人： G. Rodney Nelson, Jr. , John E. Hoffmann , Antoine J. Rouphael , James A. Proctor, Jr.
发明人： G. Rodney Nelson, Jr. , John E. Hoffmann , Antoine J. Rouphael , James A. Proctor, Jr.
IPC分类号： H04B7/216 , G08C17/00
CPC分类号： H04W56/0085 , H04B7/2637
摘要： Multiple field units in a CDMA system are synchronized for communication with a base station using shared forward and reverse link channels. In an illustrative embodiment, each field unit is assigned a time slot in a forward link channel to receive messages from the base station. Likewise, each field unit is assigned a time slot on a common reverse link channel for transmitting messages to the base station. Timing alignment and power level control among each of many field units and the base station is achieved by analyzing messages received at the base station in a corresponding time slot as transmitted by each field unit. Thereafter, a message is transmitted from the base station in a corresponding time slot to a particular field unit for adjusting its timing or power level so that future messages transmitted from the field unit are received in the appropriate time slot at the base station at a desired power level. In this way, minimal resources are deployed to maintain communication and precise synchronization between a base station and each of multiple users, minimizing collisions between field units transmitting in adjacent time slots on the reverse link. This method reduces the frequency a field unit must rely on the use of a slotted aloha random access channel according to IS-95.

10. 发明授权

US07006483B2 Qualifying available reverse link coding rates from access channel power setting 有权
公开(公告)号：US07006483B2
公开(公告)日：2006-02-28
申请号：US09792637
申请日：2001-02-23
申请人： George Rodney Nelson, Jr. , James A. Proctor, Jr. , John E. Hoffmann , Antoine J. Rouphael
发明人： George Rodney Nelson, Jr. , James A. Proctor, Jr. , John E. Hoffmann , Antoine J. Rouphael
IPC分类号： H04B7/212
CPC分类号： H04W72/042 , H04J13/00 , H04J13/0003 , H04L5/22 , H04W24/00 , H04W28/22 , H04W48/08 , H04W52/24 , H04W52/26 , H04W52/365 , H04W72/0406 , H04W72/0446 , H04W72/0466 , H04W72/0473 , H04W72/048 , H04W72/1289 , Y02D70/00
摘要： Data rate allocation decisions are made for a communications channel, such as a wireless reverse link connection. A first parameter used in this determination is a path loss, which is determined by the following process. First, a message is sent from a first station to a second station, such as on a paging channel. The message indicates a forward Effective Radiated Power (ERP) of a pilot signal transmitted by the first station. The second station then determines the received signal strength of this pilot signal, taking into account receiver gains. The path loss can then be estimated by the second station as the difference between the forward ERP data value that it received and the detected received pilot power. The second station also then preferably determines a transmit power level when transmitting a message back to the first station. This transmit power level information is encoded as a digital data word together with the forward path loss information as calculated by the first station. Upon receipt of these two pieces of information by the first station, the forward path loss estimate as calculated by the second station, and the output power value of the second station, the first station can then determine the amount of excess power available at the field unit. This excess power difference is indicative of the amount of dynamic range available in the transmit power amplifier in the particular second station. With this information, the first station can then make a determination as to whether coding rates which require a higher dynamic range will be acceptable for use by the particular second station.

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