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1.发明授权Method to dynamically determine interference and carrier-to-interference ration during TDMA calls 有权在TDMA呼叫期间动态确定干扰和载波干扰比的方法公开(公告)号：US06842438B1
公开(公告)日：2005-01-11
申请号：US09604764
申请日：2000-06-26
申请人： Russell Bernard Benedict , Alex Matusevich , Winston Edward Pekrul , Jonathan Michael Tobias , Chris Constantine Tsamutalis
发明人： Russell Bernard Benedict , Alex Matusevich , Winston Edward Pekrul , Jonathan Michael Tobias , Chris Constantine Tsamutalis
CPC分类号： H04B17/309 , H04B17/336 , H04B17/345 , H04W52/44
摘要： In the method for dynamically determining interference and carrier-to-interference ratio, interference is measured during an active TDMA time slot. In one embodiment, a base station determines the interference level in an active time slot using power level measurement taken during a DTX OFF period, when a mobile station is transmitting in discontinuous transmission mode. In another embodiment, a base station orders a mobile station to cease transmission during a SACCH portion of the time slot, and determines an interference level I measurement using power level measurements taken during the inactive SACCH field. Another embodiment provides for the determination of an interference level I using power level measurements taken during the guard and ramp fields.
摘要翻译： 在动态确定干扰和载波干扰比的方法中，在有效TDMA时隙期间测量干扰。 在一个实施例中，当移动站以不连续传输模式发送时，基站使用在DTX关闭周期期间所进行的功率电平测量来确定活动时隙中的干扰电平。 在另一个实施例中，基站订购移动台在该时隙的SACCH部分期间停止传输，并且使用在非活动SACCH字段期间进行的功率电平测量来确定干扰电平I测量。 另一个实施例提供了使用在保护和斜坡场期间进行功率电平测量的干扰电平I的确定。
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2.发明授权Measurement radio system for producing operating information for traffic radios 有权用于生成交通无线电操作信息的测量无线电系统公开(公告)号：US06535733B1
公开(公告)日：2003-03-18
申请号：US09143667
申请日：1998-08-31
申请人： Alex Matusevich , Myles Patrick Murphy , James Paul Seymour , Sheng-Jen Tsai , Chris Constantine Tsamutalis
发明人： Alex Matusevich , Myles Patrick Murphy , James Paul Seymour , Sheng-Jen Tsai , Chris Constantine Tsamutalis
IPC分类号： H04Q720
摘要： A measurement radio system uses a measurement radio to scan active channels of a base station and produce operating information for the traffic radios servicing the active channels. The measurement radio can produce operating information, such as signal strength, bit error rate (BER), frame error rate (FER) and signal to interference ratio (C/I), which is used to determine whether to change the manner in which the traffic radio is servicing the active channel. For example, if the measurement radio can switch between different sets of antennas, the measurement radio can scan an active voice/data channel using a different set of antennas than the traffic radio is using to service the active channel and determine operating information related to the signal received over the active channel using the different set of antennas. The traffic radio can use the operating information to determine whether to hand off the active channel to the different set of antennas. The measurement radio can determine operating information, such as operating coefficients, parameters or settings, to change how the traffic radio services the active channel.
摘要翻译： 测量无线电系统使用测量无线电来扫描基站的有效信道，并产生为活动信道服务的业务无线电的操作信息。 测量无线电可以产生信号强度，误码率（BER），帧错误率（FER）和信干比（C / I）等操作信息，用于确定是否改变 流量无线电正在为活动通道服务。 例如，如果测量无线电可以在不同的天线集合之间切换，则测量无线电装置可以使用与业务无线电正在使用的不同的一组天线来扫描活动的语音/数据信道来服务于活动信道，并且确定与 使用不同的天线组在有源信道上接收的信号。 业务无线电台可以使用操作信息来确定是否将有源信道切换到不同的天线组。 测量无线电可以确定操作信息，例如操作系数，参数或设置，以改变流量无线电对活动信道的服务。
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3.发明授权TDMA communication system and method including discontinuous modulation for reducing adjacent and co-channel interference 失效TDMA通信系统和方法包括用于减少相邻和同信道干扰的不连续调制公开(公告)号：US07082113B1
公开(公告)日：2006-07-25
申请号：US09156761
申请日：1998-09-18
申请人： Alex Matusevich
发明人： Alex Matusevich
CPC分类号： H04B7/2643
摘要： In a time division multiple access communication system, adjacent and co-channel interference are reduced by discontinuing or shutting off modulation of carrier frequency signals during inactive time slots so that transmitted power of carrier frequency signals are reduced. Also, the time slots and carrier frequency signals are organized so that each carrier frequency signal has the least amount of time slots designated as active time slots. The time slots are designated so that the respective same time slots of adjacent carrier frequency signals are not concurrently designated as active time slots.
摘要翻译： 在时分多址通信系统中，通过在不活动时隙期间停止或关闭载波频率信号的调制来减少相邻和同频干扰，从而降低载波频率信号的发射功率。 此外，时隙和载波频率信号被组织，使得每个载波频率信号具有指定为有效时隙的最少量的时隙。 指定时隙，使得相邻载波频率信号的各个相同的时隙不被同时指定为活动时隙。
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4.发明授权System for determining wireless coverage using location information for a wireless unit 失效用于使用无线单元的位置信息来确定无线覆盖的系统公开(公告)号：US06522888B1
公开(公告)日：2003-02-18
申请号：US09387604
申请日：1999-08-31
IPC分类号： H04Q720
CPC分类号： H04W16/18
摘要： A system for determining coverage in a wireless communications systems uses location information for a wireless unit and collects information on communications between the wireless unit and the wireless communications system in association with the location information. The wireless communications system determines and/or receives location information for the wireless unit along with other information associated with the location information. The information by location can be used to represent the coverage of a geographic region. For example, during communications between a serving base station and a wireless unit, the serving base station could receive and/or determine signal quality measurements of a forward link and/or of a reverse link at a particular location. Additionally, neighboring base stations can monitor the communications and determine and/or receive location information for the location of the wireless unit along with the information associated with or corresponding to the location of the wireless unit. The associated information can be linked with additional parameters, such as wireless unit type, wireless unit identity, frequency, operating conditions and/or base station identity.
摘要翻译： 用于确定无线通信系统中的覆盖的系统使用无线单元的位置信息，并且与位置信息相关联地收集有关无线单元与无线通信系统之间的通信的信息。 无线通信系统确定和/或接收无线单元的位置信息以及与位置信息相关联的其他信息。 位置信息可用于表示地理区域的覆盖范围。 例如，在服务基站和无线单元之间的通信期间，服务基站可以在特定位置处接收和/或确定前向链路和/或反向链路的信号质量测量。 此外，相邻基站可以监视通信，并且确定和/或接收无线单元的位置的位置信息以及与无线单元的位置相关联或对应的信息。 相关联的信息可以与诸如无线单元类型，无线单元标识，频率，操作条件和/或基站标识等附加参数链接。
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公开(公告)号：US06330458B1
公开(公告)日：2001-12-11
申请号：US09144312
申请日：1998-08-31
申请人： Philip Lamoureux , Alex Matusevich , Myles Patrick Murphy , Max Aaron Solondz , Norman Gerard Ziesse
发明人： Philip Lamoureux , Alex Matusevich , Myles Patrick Murphy , Max Aaron Solondz , Norman Gerard Ziesse
IPC分类号： H04B138
CPC分类号： H04B7/0408 , H01Q1/246 , H01Q3/24 , H04B7/0491
摘要： A time slotted system capable of switching between two or more antennas during the guard times of the time slots. Switching between antennas during the guard time of the time slots eliminates any disturbance to the user, since it eliminates any loud noise, or popping that can occur during the switching between antennas. The beamwidth of each of the antennas is narrower than needed to cover a sector of a cell of the system, increasing the size of the cell due to the larger gain of the narrower beamwidth antenna elements. The system also includes a scanning radio for determining the optimal signal amongst the signals received on the antennas, and a switch for coupling the antenna receiving the optimal signal to a receiver system. In one embodiment of the invention the optimal signal is based on the information content of the signal, such as the signal's bit error rate. In another embodiment of the invention, the optimal antenna is selected, and a plurality of a combined signals is obtained by combining the signal received on the optimal antenna and a signal received on one of the other antennas, until all of the antennas have been paired with the optimal antenna. The optimal combined signal is selected, and the antenna pair that received the signals that produced the optimal combined signal are coupled to the receiver system.
摘要翻译： 在时隙的保护时间期间能够在两个或多个天线之间切换的时隙系统。 在时隙的保护时间之间切换天线消除了对用户的任何干扰，因为它消除了在天线之间切换期间可能发生的任何大的噪声或爆发。 每个天线的波束宽度比覆盖系统的小区的扇区所需的窄，由于较窄波束宽度天线元件的较大增益而增加了小区的大小。 该系统还包括用于确定在天线上接收的信号中的最佳信号的扫描无线电装置和用于将接收最佳信号的天线耦合到接收机系统的开关。 在本发明的一个实施例中，最佳信号基于信号的信息内容，例如信号的误码率。 在本发明的另一实施例中，选择最佳天线，并且通过组合在最佳天线上接收的信号和在其它天线中的一个天线上接收的信号来获得多个组合信号，直到所有天线已经被配对 与最佳天线。 选择最佳组合信号，并且接收产生最佳组合信号的信号的天线对耦合到接收机系统。
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公开(公告)号：US06665356B1
公开(公告)日：2003-12-16
申请号：US09329399
申请日：1999-06-10
IPC分类号： H04L2722
CPC分类号： H04L7/0334
摘要： A phase-modulated signal such as a quadrature phase-shift-keyed (QPSK) signal in a wireless communication system is demodulated using sample timing based at least in part on frequency information generated by frequency demodulating the phase-modulated signal. The phase-modulated signal is separated into first and second portions, the first portion is phase demodulated to generate demodulated symbols, and the second portion is frequency demodulated to generate, e.g., a measure of the instantaneous frequency of the phase-modulated signal. The instantaneous frequency measure is processed to identify one or more symbol transitions, and the identified transitions are used to establish the sample timing such that proper sampling of the symbols is ensured.
摘要翻译： 至少部分地基于通过频率解调相位调制信号生成的频率信息，使用采样定时解调无线通信系统中的相位调制信号，例如正交相移键控（QPSK）信号。 相位调制信号被分离为第一和第二部分，第一部分被相位解调以产生解调符号，并且第二部分被频率解调以产生例如相位调制信号的瞬时频率的测量。 处理瞬时频率测量以识别一个或多个符号转换，并且使用所识别的转换来建立采样定时，从而确保符号的适当采样。
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7.发明授权Providing an accurate timing source for locating the geographical position of a mobile 有权为移动设备的地理位置提供准确的定时源公开(公告)号：US06493539B1
公开(公告)日：2002-12-10
申请号：US09362548
申请日：1999-07-28
IPC分类号： H04Q720
CPC分类号： H04W56/00 , G01S5/021 , G01S5/0226 , H04B7/2687 , H04L7/033 , H04W64/00
摘要： The synchronization system uses a TDMA or AMPS air interface to provide timing synchronization between previously unsynchronized base stations. The synchronization of base stations is critical between when determining the geographical position of a mobile because the geographical position is determined using a time difference of arrival method. In order to synchronize a remote base station with a serving base station, the remote base station receives a signal from the serving base station and measuring the receiving time of the signal at the remote base station in relation to the clock of the remote base station. The synchronization system determines the transmission time of the signal based on the reception time of the signal and the distance between the base stations, in relation to the clock signal of the second station, and synchronizes the clock of the remote base station to the clock of the serving base station based on the offset in the clock cycles at the time the signal was transmitted.
摘要翻译： 同步系统使用TDMA或AMPS空中接口来提供先前不同步的基站之间的定时同步。 在确定移动站的地理位置时，基站的同步至关重要，因为使用到达时间方法确定地理位置。 为了使远程基站与服务基站同步，远程基站从服务基站接收信号，并相对于远程基站的时钟测量远程基站处的信号的接收时间。 同步系统基于信号的接收时间和基站之间的距离相对于第二站的时钟信号确定信号的传输时间，并将远程基站的时钟同步到 基于在发送信号时的时钟周期的偏移的服务基站。
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公开(公告)号：US6119016A
公开(公告)日：2000-09-12
申请号：US95173
申请日：1998-06-10
申请人： Alex Matusevich
发明人： Alex Matusevich
CPC分类号： H04W88/08 , H04B7/2662 , H04B7/2687 , H04J3/0676 , H04J3/0685
摘要： A technique for synchronizing the timing signals in the base stations of a wireless telecommunications system is disclosed. In accordance with the illustrative embodiment of the present invention, each base station derives the frequency of its timing signal from one periodic signal, but the phase of its timing signal from a second periodic signal. In general, the base station derives its timing signal based on: (1) the frequency of a reference timing signal, and (2) the phase of a feedback signal. The reference timing signal can be obtained from a common timing source or from different timing sources which are designed to have the same frequency. The feedback signal is advantageously the confluence of two feedback loops. In accordance with the first feedback loop, the feedback signal is based on the phase of the base station's own timing signal. In accordance with the second feedback loop, the feedback signal is based on the phase of the timing signals from one or more nearby base stations. Advantageously, the feedback signal is based on the Boolean AND or NAND function of the base station's own timing signal and the timing signals of the nearby base stations.
摘要翻译： 公开了一种用于使无线电信系统的基站中的定时信号同步的技术。 根据本发明的说明性实施例，每个基站从一个周期信号导出其定时信号的频率，但是从第二周期信号得到其定时信号的相位。 一般来说，基站根据以下原因得出其定时信号：（1）参考定时信号的频率，以及（2）反馈信号的相位。 参考定时信号可以从公共定时信号源或被设计为具有相同频率的不同定时源获得。 反馈信号有利地是两个反馈回路的汇合。 根据第一反馈回路，反馈信号基于基站自身的定时信号的相位。 根据第二反馈回路，反馈信号基于来自一个或多个附近基站的定时信号的相位。 有利地，反馈信号基于基站自己的定时信号和附近基站的定时信号的布尔AND或NAND功能。
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公开(公告)号：US06567486B1
公开(公告)日：2003-05-20
申请号：US09360574
申请日：1999-07-26
IPC分类号： H04L702
摘要： A phase-modulated signal such as a quadrature phase-shift-keyed (QPSK) signal in a wireless communication system is demodulated by frequency demodulating the phase-modulated signal. The phase-modulated signal is separated into first and second copies, the first copy is phase demodulated to generate demodulated symbols, and the second copy is frequency demodulated to generate, e.g., a measure of the instantaneous frequency of the phase-modulated signal. The instantaneous frequency measure is processed to identify one or more symbol transitions, and the identified transitions are used to generate event signals having signature properties (signature events). These signature events are used in traditional Time Difference of Arrival tdoa algorithms to accurately determine position of a mobile unit in the wireless communication system.
摘要翻译： 通过频率解调相位调制信号来解调无线通信系统中的相位调制信号，例如正交相移键控（QPSK）信号。 相位调制信号被分离为第一和第二副本，第一副本被相位解调以产生解调符号，并且第二副本被频率解调以产生例如相位调制信号的瞬时频率的测量。 处理瞬时频率测量以识别一个或多个符号转换，并且所识别的转换用于生成具有签名属性（签名事件）的事件信号。 这些签名事件用于传统的到达时差算法，以准确地确定移动单元在无线通信系统中的位置。
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10.发明授权Method and apparatus for sampling timing adjustment and frequency offset compensation 有权用于采样定时调整和频偏补偿的方法和装置公开(公告)号：US06567480B1
公开(公告)日：2003-05-20
申请号：US09371529
申请日：1999-08-10
IPC分类号： H04L2722
CPC分类号： H04L7/0054 , H04L7/0066 , H04L27/2275 , H04L2027/003 , H04L2027/0036 , H04L2027/0046 , H04L2027/0065
摘要： A simplified method for sampling timing adjustment and frequency offset estimation in a TDMA cellular PCS environment using &pgr;/4 - shifted DQPSK comprises the steps of oversampling a received signal resulting from transmission of sequences of complex-valued symbols at a rate N times the symbol rate thereof so as to produce N sets of samples, comparing for each set of samples the differential phase angle between successively received complex-valued symbols, and determining which set of the N sets of samples has differential phase angles closest to ideal values to thereby obtain an optimal sampling timing. The differential phase angles are measured by multiplying a complex conjugate of a received complex-valued symbol and a succeeding symbol to produce a comparison vector having an angle equal to the differential phase angle between the received complex-valued symbol and the succeeding symbol. The differential phase angles are optionally rotated so that the angle thereof is between 0° and 90°. Frequency offset is estimated by determining a constant deviation of the differential phase angles from an ideal differential phase angle value for a plurality of successive comparison vectors by correlating the rotated comparison vectors against a bank of unit vectors to determine a maximum correlation.
摘要翻译： 使用π/ 4位移DQPSK的TDMA蜂窝PCS环境中的采样定时调整和频率偏移估计的简化方法包括以N倍于符号速率的速率传输复值符号序列而产生的接收信号过采样的步骤 以产生N组样本，将连续接收的复值符号之间的差分相位角的每组样本进行比较，并且确定N组样本中的哪一组具有最接近理想值的差分相位角，从而获得 最佳采样时间。 通过将接收的复值符号和后续符号的复共轭相乘来产生差分相位角，以产生具有等于接收的复值符号和后续符号之间的差分相位角的角度的比较矢量。 可选择地使差分相角旋转使其角度在0°和90°之间。 通过将旋转的比较矢量与一组单位向量相关联来确定差分相位角与多个连续比较矢量的理想差分相位角值的恒定偏差来估计频率偏移，以确定最大相关性。
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