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21. 发明申请

US20080019427A1 False channel detection for wireless communication 有权
标题翻译：无线通信的虚拟信道检测
公开(公告)号：US20080019427A1
公开(公告)日：2008-01-24
申请号：US11491210
申请日：2006-07-21
申请人： Christopher C. Riddle , Tien Chien Chen
发明人： Christopher C. Riddle , Tien Chien Chen
IPC分类号： H04B1/00 , H04L27/06
CPC分类号： H04B1/7075 , H04B1/70775 , H04B1/7117 , H04B2001/70706 , H04L27/0014
摘要： Techniques for detecting acquisition of a false channel in a wireless communication system are described. For false channel detection, a peak corresponding to a signal from a base station is initially detected. Frequency acquisition and time tracking of the peak are then performed. The frequency acquisition attempts to determine and correct downconversion frequency error. The time tracking attempts to follow the peak as it moves due to sample timing error and/or changes in channel conditions. Whether the signal is from a desired frequency channel or a false frequency channel is determined based on the time tracking. If a false channel is acquired, then the sampling timing will be either too slow or too fast, and the peak will move at a fast rate. A false channel may be detected based on the movement of the peak.
摘要翻译：描述用于检测无线通信系统中的虚信道的获取的技术。对于伪信道检测，初始检测到对应于来自基站的信号的峰值。然后进行峰值的频率采集和时间跟踪。频率采集尝试确定和修正下变频频率误差。由于采样定时误差和/或信道条件的变化，时间跟踪尝试跟随峰值。基于时间跟踪确定信号是来自期望的频道还是假频道。如果获取了虚假通道，则采样时间将太慢或太快，并且峰值将以快速速率移动。可以基于峰值的移动来检测虚信道。

22. 发明授权

US07181244B2 Method and apparatus for using position location to direct narrow beam antennas 有权
标题翻译：使用位置定位来引导窄波束天线的方法和装置
公开(公告)号：US07181244B2
公开(公告)日：2007-02-20
申请号：US09998860
申请日：2001-11-15
申请人： Bruce A. Judson , Christopher C. Riddle
发明人： Bruce A. Judson , Christopher C. Riddle
IPC分类号： H04M1/00
CPC分类号： H04W16/28 , H01Q1/246 , H01Q3/2605 , H01Q21/28 , H01Q21/30
摘要： A novel mobile unit which communicates with a new and advantageous base station. The mobile unit includes a system for generation of position information and a transceiver for transmitting the position information. In the preferred embodiment, the transceiver is a CDMA system and the system for generating position information includes an arrangement for receiving a GPS signal. In the preferred embodiment, a GPS assisted arrangement is employed which is adapted to receive a signal from an airborne platform as well as from a satellite based platform. The inventive base station is adapted to receive position information from a remote unit and provide a received position signal in response thereto. The novel base station is further equipped with a mechanism for directing a beam in response to the received position signal. In the illustrative embodiment, the mechanism for directing the beam is a smart antenna system including an antenna array and a beamforming network for driving the array to output the directed beam.
摘要翻译：与新的和有利的基站进行通信的新型移动单元。移动单元包括用于产生位置信息的系统和用于发送位置信息的收发器。在优选实施例中，收发器是CDMA系统，并且用于产生位置信息的系统包括用于接收GPS信号的装置。在优选实施例中，采用GPS辅助装置，其适于从机载平台以及基于卫星的平台接收信号。本发明的基站适于从远程单元接收位置信息并响应于此提供接收到的位置信号。新型基站还配备有用于响应于接收到的位置信号来引导波束的机构。在说明性实施例中，用于引导光束的机构是包括用于驱动阵列以输出定向光束的天线阵列和波束成形网络的智能天线系统。

23. 发明授权

US06483817B1 Digital combining of forward channels in a base station 有权
标题翻译：基站中前向信道的数字组合
公开(公告)号：US06483817B1
公开(公告)日：2002-11-19
申请号：US09172332
申请日：1998-10-14
申请人： Franklin Antonio , Christopher C. Riddle
发明人： Franklin Antonio , Christopher C. Riddle
IPC分类号： H04J100
CPC分类号： H04W88/08 , H04B1/707 , H04L5/06
摘要： A base station architecture splits modem functionality into modulator and demodulator entities, each configured to handle multiple telephone calls. A high-speed digital bus with associated routing elements connects multiple-channel (i.e., multiuser) modulator and demodulator elements. The modulator and demodulator elements may be physically separated, residing on different cards, and even different shelves, within the base station. On each modulator card, the outputs of multiple modulators may be combined by digitally upconverting the output of each modulator by a different amount and summing the results.
摘要翻译：基站架构将调制解调器功能分解成调制器和解调器实体，每个被配置为处理多个电话呼叫。具有相关联的路由元件的高速数字总线连接多通道（即，多用户）调制器和解调器元件。调制器和解调器元件可以在基站内物理上分离，驻留在不同的卡上，甚至不同的货架上。在每个调制器卡上，多个调制器的输出可以通过以不同的量对每个调制器的输出进行数字上变频转换并将其结果相加来进行组合。

24. 发明授权

US6148317A Method and apparatus for compressing signals in a fixed point format without introducing a bias 有权
标题翻译：用于以固定点格式压缩信号而不引入偏差的方法和装置
公开(公告)号：US6148317A
公开(公告)日：2000-11-14
申请号：US134248
申请日：1998-08-14
申请人： Christopher C. Riddle , Jeffrey A. Levin
发明人： Christopher C. Riddle , Jeffrey A. Levin
IPC分类号： H03M7/24 , G06F7/48 , H03M7/34 , G06F7/38
CPC分类号： G06F7/48 , G06F7/49952 , G06F7/49963
摘要： A method and apparatus for compressing fixed point signals without introducing a bias. Signals are compressed according to a dithered rounding approach wherein signal values are rounded up and rounded down with approximately equal probability, canceling the bias that would otherwise result from the rounding operation. Numerical properties of the input signal are exploited in order to determine whether the signal value should be rounded up or down. Signal compression may, therefore, be introduced at multiple points within a system without accumulating a signal bias and degrading downstream performance. Further, one bit signal compression may be achieved in a particularly efficient fashion with a minimal amount of hardware.
摘要翻译：一种在不引入偏压的情况下压缩固定点信号的方法和装置。根据抖动四舍五入方法对信号进行压缩，其中信号值以大概相等的概率向上舍入并向下取整，消除否则由舍入操作引起的偏差。利用输入信号的数值属性来确定信号值是否应该向上或向下舍入。因此，可以在系统内的多个点引入信号压缩，而不会累积信号偏差并降低下行性能。此外，可以以最小量的硬件以特别有效的方式实现一位信号压缩。

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